\(OCl^-_{(aq)} + H_2O_{(l)} \rightleftharpoons HOCl_{(aq)} + OH^-_{(aq)}\). For Ca(OH)2 solution [OH] is roughly twice molar concentration of calcium hydroxide, which is roughly 0.025 for saturated solution. Figure1. What I reason: This relation holds for any base and its conjugate acid or for any acid and its conjugate base. Explain your answer in, A:Concept used here: This is similar to the simplification of the formula of the hydronium ion, [latex]{\text{H}}_{3}{\text{O}}^{\text{+}}[/latex] to H+. D) SCN. Kb NH3 = 1.8 x 10^-5 Determine if the following salt is neutral, acidic or basic. Question: Is B2 2-a Paramagnetic or Diamagnetic ? TLDR: It's still just a salt. In terms of the wave's period TTT, what are the earliest times after t=0t=0t=0 that points B, C, and D reach the positions shown? We will not find a value of Ka for the ammonium ion in Ionization Constants of Weak Acids. Calculate the pH of a 0.275M solution of aniline, CHNH. Determine whether aqueous solutions of the following salts are acidic, basic, or neutral: Consider each of the ions separately in terms of its effect on the pH of the solution, as shown here: If we measure the pH of the solutions of a variety of metal ions we will find that these ions act as weak acids when in solution. It would be a basic salt. HO A. Start typing to see posts you are looking for. Why would you expect hydrazine to be basic? Is it possible to create a concave light? If salt is formed from a, Q:Nitric acid reacts with ammonia to yield ammonium nitrate. [latex]{K}_{\text{a}}\left(\text{for}{\text{C}}_{6}{\text{H}}_{5}{\text{NH}}_{3}{}^{\text{+}}\right)=\frac{{K}_{\text{w}}}{{K}_{\text{b}}\left(\text{ for }{\text{C}}_{6}{\text{H}}_{5}{\text{NH}}_{2}\right)}=\frac{1.0\times {10}^{-14}}{4.6\times {10}^{-10}}=2.2\times {10}^{-5}[/latex]. "Al"("NO"_3)_3 is strongly acidic because "Al"^(3+) is a Lewis acid. If we can find the equilibrium constant for the reaction, the process is straightforward. If Ka > Kb, the solution is acidic, and if Kb > Ka, the solution is basic. [latex]=\frac{\left[{\text{CH}}_{3}{\text{CO}}_{2}\text{H}\right]\left(2.5\times {10}^{-6}\right)}{\left(0.050\right)}=5.6\times {10}^{-10}[/latex]. How does its basic character compare with that of NH3 and N2H4? Doesn't analytically integrate sensibly let alone correctly. How can i get Factor of 1.666 for multipling to Mn. Explain and justify your answer clearly. Which substance, NH3 or N2H4, would you expect to be more basic? because there were, A:Arrhenius acid/base concept :- Q:Calculate the concentration of OH and the pH of a solution that is 0.20 M in aqueous NH3 and For example, sodium acetate, NaCH3CO2, is a salt formed by the reaction of the weak acid acetic acid with the strong base sodium hydroxide: [latex]{\text{CH}}_{3}{\text{CO}}_{2}\text{H}\left(aq\right)+\text{NaOH}\left(aq\right)\longrightarrow {\text{NaCH}}_{3}{\text{CO}}_{2}\left(aq\right)+{\text{H}}_{2}\text{O}\left(aq\right)[/latex]. (aq) HA (aq) H+(aq) +, Q:Which of the following is a Lewis acid? A solution is neutral when it contains equal concentrations of hydronium and hydroxide ions. Be sure to include the proper phases for all species within the reaction. You mean : $\ce{Ca(OH)2_\mathrm{(aq)} <=>Ca(OH)^+_\mathrm{(aq)} + OH^-_\mathrm{(aq)}}$ , so: $$[\ce{OH-}]=[\ce{Ca(OH)2}] = \frac{1.9}{74}=\pu{0.025M}$$. Explain why? Required fields are marked *. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. A 0.015-M solution of cyanic acid has a pH of 2.67. If we want to determine a Kb value using one of these handbooks, we must look up the value of Ka for the conjugate acid and convert it to a Kb value. Strong acid + weak base= acidic salt Strong base+ weak acid= basic salt Strong . NaCl + HOH ==> NaOH + HCl Several antacids have aluminum hydroxide, Al(OH)3, as an active ingredient. forms acidic solutions. strongest to weakest, at 25 C. ammonium sulfite ((NH4)2SO3) sodium citrate (Na3C6H5O7) sodium hydrogen. Why? The way to tell if salt is acidic or not is by using the pH scale. If neutral, simply write only NR. When we neutralize a weak base with a strong acid, the product is a salt containing the conjugate acid of the weak base. New Questions About Fantasy Football Symbols Answered and Why You Must Read Every Word of This Report. Identify the following salts as neutral acidic or basic: LiNO3, SrBr2, LiF, KCN, NH4ClO4, NH4Br, NH4CN, LiNO3,- neutral (salt of a strong acid and a strong base) We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. A:The reaction of acid with base results in the formation of salt and water. When the conjugate acid and the conjugate base are of unequal strengths, the solution can be either acidic or basic, depending on the relative strengths of the two conjugates. Looking at all the chemical properties of Methanol and its pKa value, many biochemists consider this molecule amphoteric in nature as it has both basic and acidic properties. Acid strength of alcohols in decreasing order: alkyl->primary alcohols>secondary alcohols>>tertiary alcohols. NO3- ions will not affect the pH. forms basic solutions. A solution of this salt contains sodium ions and acetate ions. When a salt such as NaCl dissolves in water, it produces Na + ( aq) and Cl ( aq) ions. The best answers are voted up and rise to the top, Not the answer you're looking for? The new step in this example is to determine Ka for the [latex]{\text{C}}_{6}{\text{H}}_{5}{\text{NH}}_{3}{}^{\text{+}}[/latex] ion. \[\ce{H2CO3(aq) + H2O(l) <=> H3O^{+}(aq) + HCO^{-}3(aq)} \nonumber\], \[\ce{HCO^{-}3(aq) + H2O(l) <=> H3O^{+}(aq) + CO^{2-}3(aq)} \nonumber \]. Classify the following salts as acidic, basic or neutral: (a) NaF (b) BaBr2 (c) CH3NH3NO3. Find answers to questions asked by students like you. Acid = CH3COOH These lone pairs of electrons are used by Lewis acids to complete their orbitals. Based on how strong the ion acts as an acid or base, it will produce varying pH levels. Wiki User 2013-03-22 21:22:03 Study now See answer (1) Best Answer Copy It is an Acid! pH are measured to have lower pH values than basic or alkaline solutions. A solution of this salt contains ammonium ions and chloride ions. It only takes a minute to sign up. The concentration of C6H5CH2COOH [C6H5CH2COOH] =. $\ce{HCl}$ is a strong acid, and so the salt should be slightly acidic. RbOC1, KI, Ba(ClO4),, and NH4NO3. Aniline is an amine that is used to manufacture dyes. Negligible Basicity. Petrucci, Ralph H., William S. Harwood, F G. Herring, and Jeffry D. Madura. If neutral, simply write only NR. What is the pH of a 0.233 M solution of aniline hydrochloride? Write the equation for this reaction. This is known as a hydrolysis reaction. Will NO3 ions affect the pH of a solution? Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. The same way that polyprotic acids lose H. Predict whether the pH of each of the following salts placed into water is acidic, basic, or neutral. That is Lewis acid is any substance which can accept a pair. In other, Q:Calculate the pH and pOH of the following solutions (see However, the conjugate base of the weak acid is a weak base and ionizes slightly in water. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. The ionization, Q:What will be the character following salts are acidic, basic, or neutral at 25C: (a) Cu(CH3COO)2;, A:Given, [latex]\text{Al}{\left({\text{H}}_{2}\text{O}\right)}_{4}{\left(\text{OH}\right)}_{2}{}^{\text{+}}\left(aq\right)+{\text{H}}_{2}\text{O}\left(l\right)\rightleftharpoons {\text{H}}_{3}{\text{O}}^{\text{+}}\left(aq\right)+\text{Al}{\left({\text{H}}_{2}\text{O}\right)}_{3}{\left(\text{OH}\right)}_{3}\left(aq\right)[/latex]. Solving this equation we get [CH3CO2H] = 1.1 [latex]\times [/latex] 105M. And hence, as it is an electron-rich compound that can donate the electrons to other molecules, it exhibits a property of Lewis Base. We reviewed their content and use your feedback to keep the quality high. In 0.200 M CH3NH2, only 8.4 % of the base has LiOH Christopher Wu (UCD), Christian Dowell (UCD), Nicole Hooper (UCD). One might argue how an OH group can be considered as a base. b. that contain F- and are, A:Since you have posted a question with multiple sub-parts, we will solve the first three subparts for, Q:Define an acid according to the Lewis theory. Here are examples of the four types. \(NaOCl _{(s)} \rightarrow Na^+_{(aq)} + OCl^-_{(aq)}\). NH4NO2 + HOH ==> HNO2 + NH4OH View all posts by Priyanka , Your email address will not be published. 2003-2023 Chegg Inc. All rights reserved. from which acid and which base. NaOH is a strong base, HAc a weak acid, solution is basic. A:Acidic strength measures the tendency of acid. Consider the positive ion of this salt. c. HF, NaF. In spite of the unusual appearance of the acid, this is a typical acid ionization problem. Draw the Lewis electron-dot formula for the hydrazine molecule. Some salts formed in neutralization reactions may make the product solutions slightly acidic or slightly basic. Ionic equilibri. The structure of ethylene diamine is illustrated in study question 76. NH4ClO4,-acidic (salt of a strong acid and a weak base) CI A 0.015 M solution of hydrogen cyanate, HOCN, has a pH of 2.67. This reduces the odor of the fish, and also adds a sour taste that we seem to enjoy. a. HC3H3O3 b. HCN c. H2SO4 d. H2SO3. Calculate Ka for the acid. What I've experienced: An aqueous solution of CH 3 NH 3 NO 3 will be Group of answer choices A. basic, because of the hydrolysis of NO 3- ions. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Is calcium chloride an acidic or basic salt? MathJax reference. Chose if that solution is acidic,, Q:Methylamine, CH3NH2, is a weak base. Because, of course, all these salts come from an acid + a base. The reaction is: We are given two of three equilibrium concentrations and asked to find the missing concentration. Let us use an acetic acid-sodium acetate buffer to demonstrate how buffers work. Basic. It is the weak conjugate base of Strong Acid HNO3. Q:Calculate the [OH-] of a solution with 10.0 M H3O+ and classify as acidic, basic, or neutral. Legal. When heated to hight enough temperature, moist calcium chloride hydrolyzes https://link.springer.com/article/10.1007/BF02654424. Na+ is excluded from this reaction since it is a spectator ion. Arrhenius acid act as a good electrolyte as it dissociates to its respective ions in the aqueous solutions. To learn more, see our tips on writing great answers. What about CO3{2-} ions? Salt is a substance that is made up of both an acid and a base. It has an empty 3p_z orbital that accepts electron density, making it an electron pair acceptor, a Lewis acid. A salt in which the cation is the counterion of a strong base and in which the anion is the conjugate base of weak acid form basic solutions. Another potential reason for contamination is hot drying. a AlCl3+Cl b I+I2. $pOH = -log [OH]$; $log_{10} 0.025 = 1.6$; $14-1.6 > 12$. (NH4)2CO3is, Q:Write the net ionic equation for the hydrolysis reaction that occurs when sodium acetate, NaCH3CO2,, Q:Will the following oxides give acidic, basic, or neutral solutions when dissolved in water? One of the most common antacids is calcium carbonate, CaCO3. Are there tables of wastage rates for different fruit and veg? Your question is solved by a Subject Matter Expert. Now, NO3- won't attract an H+ because it is usually from a strong acid. Check out a . Co32- Then write the Lewis formulas of the reactants and products and identify each reactant as a Lewis acid or a Lewis base. Classify the following salts as acidic, basic or neutral: (a) NaF (b) BaBr2 (c) CH3NH3NO3. A:Acids and bases are defined in different terms by various theories. It is only applicable for, Q:In HO, HF is weak and the other hydrohalic acids areequally strong. HF How can we prove that the supernatural or paranormal doesn't exist? Calcium hydroxide has solubility about 1.9 g/L. \[ \mathrm{C}_{5} \mathrm{H}_{5} \mathrm{NHI}. Answer = SiCl2F2 is Polar What is polarand non-polar? (b) BaBr2 Q:NH3 contains no OH- ions, and yet its aqueous solutions are basic. A strong monoprotic acid, with the molecular structure , is dissolved in a beaker of water. NH4Br = acid When NaOH is added to HA, Q:In most solutions containing a strong or weak acid, the autoionization of water can be neglected, A:Acid is a compound that donates proton and base is a compound that accepts proton. undergone, Q:Say whether the following salt solutions would be acidic, basic or neutral. I suggest you write them even though you think neither anion nor cation is hydrolyzed. Since both the acid and base are strong, the salt produced would be neutral. not only neutralizes stomach acid, it also produces CO2(g), which may result in a satisfying belch. formula of Conjugate base = ? HO Q:Write the formula of the conjugate base of CHCOH. Because Perchloric Acid is a strong acid, it's Conjugate Base, ClO4- is Weak, and is negligible because it's not that basic. Question = Is IF4-polar or nonpolar ? Your question is solved by a Subject Matter Expert. The aluminum hydroxide tends to cause constipation, and some antacids use aluminum hydroxide in concert with magnesium hydroxide to balance the side effects of the two substances. b. EtH Making statements based on opinion; back them up with references or personal experience. But its not the hydroxyl group; it is the OH- hydroxide ion that makes the compound a Lewis base. In a particular solution, acetic acid is 11% ionized at 25 C. Calculate the pH of the solution and the mass of acetic acid dissolved to yield 1.00L of solution. Weak acid Can chemical composition be determined from elemental composition? SrBr2, -neutral (salt of a strong acid and a strong base) (c) contain ClO4- and are neutral. But we don't need to do that here) so 1.9 x 10 -11 x 2 /0.80 and you obtain x = 3.9 x 10 -6 = [H +] Take the -log of [H +] and you will have the pH of the solution. I suggest you write them even though you think neither anion nor cation is hydrolyzed. Acid. Assume that you can ignore air resistance for this problem. Ionic equilibrium deals with the equilibrium involved in an ionization process while chemical equilibrium deals with the equilibrium during a chemical change. Strong acid + weak base= acidic salt Yes, they're bigger and "badder" then most other salts. The value of Ka for this acid is not listed inIonization Constants of Weak Acids, but we can determine it from the value of Kb for aniline, C6H5NH2, which is given as 4.6 [latex]\times [/latex] 1010 (Relative Strengths of Acids and Basesand Ionization Constants of Weak Bases): [latex]{K}_{\text{a}}\left(\text{ for }{\text{C}}_{6}{\text{H}}_{5}{\text{NH}}_{3}{}^{\text{+}}\right)\times {K}_{\text{b}}\left(\text{ for }{\text{C}}_{6}{\text{H}}_{5}{\text{NH}}_{2}\right)={K}_{\text{w}}=1.0\times {10}^{-14}[/latex] It could contain either an excess of hydronium ions or an excess of hydroxide ions because the nature of the salt formed determines whether the solution is acidic, neutral, or basic. By the end of this module, you will be able to: As we have seen in the section on chemical reactions, when an acid and base are mixed, they undergo a neutralization reaction. A neutralization reaction takes place between citric acid in lemons or acetic acid in vinegar, and the bases in the flesh of fish. Nature if solution, Q:Rantidine is a nitrogen base that is used to control stomach acidity by suppressing the stomachs, Q:1. NaCl + HOH ==> NaOH + HCl Do new devs get fired if they can't solve a certain bug? O NH3 If you preorder a special airline meal (e.g. This conjugate acid is a weak acid. Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. General Chemistry: Principles and Modern Applications. A 0.10 M solution of chloroacetic acid, ClCH2COOH, has a pH of 1.95. (b) contain Na+ and are basic. A:Given : Concentration of H3O+ in the solution = 10.0 M, Q:What is the pH of a solution with OH- of 0.0001 M KOH at 25C. As you may have guessed, antacids are bases. Hydrazine, N2H4 (having the structure H2NNH2), and its derivatives have been used as rocket fuels. What video game is Charlie playing in Poker Face S01E07? Set your categories menu in Theme Settings -> Header -> Menu -> Mobile menu (categories). When we have heartburn, it feels better if we reduce the excess acid in the esophagus by taking an antacid. This is enough to create pH above 11, i.e. In industry calcium chloride is produces by reaction of calcium hydroxide with ammonium chloride, so industrial-grade calcium chloride is likely to be contaminated with calcium hydroxide. San Francisco: Pearson Education, 2007. Many people like to put lemon juice or vinegar, both of which are acids, on cooked fish (Figure1). . When we mix solutions of an acid and a base, an acid-base neutralization reaction occurs. This conjugate acid is a weak acid. 2nd ed. Q:Perchloric acid, HClO, is the strongest of the halogenoxoacids, and hypoiodous acid, HIO, is the. Q:The substance trimethylamine is a weak nitrogenous base like ammonia. Print. A, Q:Arrange the following in order of INCREASING acidity. Methanoic acid, HCO,H, also known as formic acid, is partly responsible for the characteristic. Express your answer, A:An acid is a substance that gives ions in its solution whereas a basic substance gives ions in its, Q:(a) The hydrogen sulfite ion (HSO3-) is amphiprotic. - HF This is the most complex of the four types of reactions. Definition: Ionization increases as the charge of the metal ion increases or as the size of the metal ion decreases. Write the letter that corresponds to, A:According to Bronsted and Lowry , the compound which donate H+ ( proton ) is called acid and which. D. basic, because of the ionization of CH 3 NH 2. *MasteringChemistry Wiki User 2013-03-22 21:22:03 This answer is:. 3, NaOH - all of these, A:The species that increase the concentration of hydrogen ions or hydronium in an aqueous solution act, Q:4.1 Give two reactions that show the acidic nature of ph. When water and salts react, there are many possibilities due to the varying structures of salts. A) Fe3* First week only $4.99! The acetate ion behaves as a base in this reaction; hydroxide ions are a product. And according to the definition of acids, a compound that willingly loses a proton is considered acid. Concentration of solution - 0.076 mol L1(M) Appendix 11 of your textbook for pKa, A:"Since you have asked multiple questions and not mentioned the question number to be solved, we will, Q:2b.For each of the following salts indicate whether the aqueous solution will be acidic basic or, A:The acidity or basicity of a salt can be determined by its dissociation. E. basic, because of the hydrolysis of CH 3 NH 3+ ions. CH3NH3NO3 NaF BaBr2 This problem has been solved! Answer = C2Cl2 is Polar What is polarand non-polar? Acidity of alcohols and basicity of amines. If acidic or basic, write the appropriate equilibrium equation for the acid or base that exists when the salt is dissolved in aqueous solution. How many grams of KOH were added? 9tth ed. Milk of Magnesia is a suspension of the sparingly soluble base magnesium hydroxide, Mg(OH)2. Calculate Ka for the acid. Your email address will not be published. K+ We will first draw ICE table and then, Q:Write the net ionic equation for the hydrolysis reaction that occurs when sodium Figure3. Hence the molecule or, Q:1. Is CH3NH3NO3 a acid or base? - H2CO3 Upper Saddle River, NJ: Pearson Prentice Hall, 2007. Molecular weight if Na3PO4 = 163.94 g/mol View this solution and millions of others when you join today! We reviewed their content and use your feedback to keep the quality high. a strongly basic solution. Find answers to questions asked by students like you. Give the answer in 2 significant, A:Given :- concentration of KOH = 0.00015 M Spencer L. Seager, Michael R. Slabaugh, Maren S. Hansen, Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer, Classify the following salts as acidic, basic or neutral: (a) NaF (b) BaBr2 (c) CH3NH3NO3, Chemistry for Today: General, Organic, and Biochemistry. . O CH4 The OH functional group gives the properties of the Lewis base, and hence CH3OH has properties of both weak acid and bases. What this means is that the aluminum ion has the strongest interactions with the six closest water molecules (the so-called first solvation shell), even though it does interact with the other water molecules surrounding this [latex]\text{Al}{\left({\text{H}}_{2}\text{O}\right)}_{6}{}^{3+}[/latex] cluster as well: [latex]\text{Al}{\left({\text{NO}}_{3}\right)}_{3}\left(s\right)+6{\text{H}}_{2}\text{O}\left(l\right)\longrightarrow \text{Al}{\left({\text{H}}_{2}\text{O}\right)}_{6}{}^{3+}\left(aq\right)+3{\text{NO}}_{3}{}^{\text{-}}\left(aq\right)[/latex]. pH = 3.00 Write a net ionic equation to. https://en.wikipedia.org/wiki/Base_(chemistry), https://en.wikipedia.org/wiki/Salt_(chemistry), https://en.wikipedia.org/wiki/Neutralization_(chemistry). Median response time is 34 minutes for paid subscribers and may be longer for promotional offers. (c) CH3NH3NO3. Which of the following are expected to act as a Lewis acid? 2. If acidic or basic, write the appropriate equilibrium equation for the acid or base that exists when the salt is dissolved in aqueous solution. [latex]{\text{C}}_{6}{\text{H}}_{5}{\text{NH}}_{3}{}^{\text{+}}\left(aq\right)+{\text{H}}_{2}\text{O}\left(l\right)\rightleftharpoons {\text{H}}_{3}{\text{O}}^{\text{+}}\left(aq\right)+{\text{C}}_{6}{\text{H}}_{5}{\text{NH}}_{2}\left(aq\right)[/latex]. If neutral, simply write only NR. Is calcium oxide an ionic or covalent bond . From strong bases: Group 1 and Group 2, but not Be2+. $\ce{CaCl2}$ solutions should be very slightly acidic if they were made from pure $\ce{CaCl2}$. Our videos will help you understand concepts, solve your homework, and do great on your exams. \[ \left(\mathrm{CH}_{3}\right)_{3}. A weak acid plus a weak base can yield either an acidic, basic, or neutral solution. Polar "In chemistry, polarity i Is CH3NH3NO3 an acid or base or neutral ? 16.3, list the approximate pH value of live everyday solutions. Write abalanced chemical equation showing how, A:(a) When aluminum nitrate dissolves in water, the aluminum ion reacts with water to give a hydrated aluminum ion, [latex]\text{Al}{\left({\text{H}}_{2}\text{O}\right)}_{6}{}^{3+}[/latex], dissolved in bulk water. Why did Ukraine abstain from the UNHRC vote on China? All of the rules from above still apply. The pH scale, Q:Rank the following in terms of basicity (base strength) from However, This alcohol exhibits weak acidic properties because the CH3 group and OH functional group leads to releasing negative ions in the aqueous solution. \(\dfrac{x^2}{0.2-x} = \dfrac{1*10^{-14}}{1.8 \times 10^{-5}}\). What I reason: Calcium chloride is the salt of hydrochloric acid and calcium hydroxide. Occasionally the weak acid and the weak base will have the, Do the calculations and show that the hydronium ion concentration for a 0.233-, What is the hydronium ion concentration in a 0.100-, [latex]{K}_{a}\left(\text{for}{\text{NH}}_{4}{}^{\text{+}}\right)=5.6\times {10}^{-10}[/latex], [latex]\left[{\text{H}}_{3}{\text{O}}^{\text{+}}\right][/latex] = 7.5 [latex]\times [/latex] 10. write the equation for this, Q:The uses of sodium phosphate include clarifying crudesugar, manufacturing paper, removing boiler, A:Na3PO4 + 3H2O --------> 3NaOH + H3PO4 basic or, Q:Rank the compounds in each of the following groups in order of increasing acidity or basicity, as, Q:Complete the following table with the needed [H3O+], [OH-], pH, and pOH. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. BCl3 A:Lewis acid and base concept: However, NH 4+ will lose an electron and act as an acid (NH 4+ is the conjugate acid of NH 3) by the following reaction: (7.8.4) N H 4 ( a q) + + H 2 O ( l) N H 3 ( a q) + H 3 O ( a q) +. [latex]\text{Cu}{\left({\text{H}}_{2}\text{O}\right)}_{6}{}^{2+}\left(aq\right)+{\text{H}}_{2}\text{O}\left(l\right)\rightleftharpoons {\text{H}}_{3}{\text{O}}^{\text{+}}\left(aq\right)+\text{Cu}{\left({\text{H}}_{2}\text{O}\right)}_{5}{\left(\text{OH}\right)}^{\text{+}}\left(aq\right){K}_{\text{a}}=~6.3[/latex] Ball 222 A strong acid and a weak base yield a weakly acidic solution, not because of the strong acid involved, but because of the conjugate acid of the weak base. The reaction, [latex]{\text{CaCO}}_{3}\left(s\right)+2\text{HCl}\left(aq\right)\rightleftharpoons {\text{aCl}}_{2}\left(aq\right)+{\text{H}}_{2}\text{O}\left(l\right)+{\text{CO}}_{2}\left(g\right)[/latex].