(b) Solid silver chloride is added to a solution of concentrated hydrochloric ac

Question

(b) Solid silver chloride is added to a solution of concentrated hydrochloric acid, forming a complex ion. (i) Balanced equation: AgCl+ Cl- [AgCIJ' (ii) Which species acts as a Lewis base in the reaction? Explain. Cl is a Lewis base because it donates an electron pair (c) A solution of ethanoic (acetic) acid is added to a solution of barium hydroxide. of ethanoic (aceti) acid is (i) Balanced equation: CH3COOH-OH CH3C00' + H2O (ii) Explain why a mixture of equal volumes of equimolar solutions of ethanoic acid and barium hydroxide is basic. Since barium hydroxide has two moles of OH per mole, the mixture would have an excess of hydroxide, making it basic.

Explanation / Answer

Solution :-

Part b

i)Balanced reaction equation for the AgCl and hydrochloric acid

AgCl(s) + 3HCl(aq)   ----------- > Ag(Cl)4^3- + 3H^+

ii) In the given reaction HCl acid is the giving the Cl^- which acts as the lewis base because according to the lewis acid base theory a base is the electron pair donar species.

Part c)

i)Balanced equation for the reaction of the ethanoic acid with barium hydroxide is as follows

CH3COOH + Ba(OH)2   ----- >Ba(CH3COO)2    + 2H2O

ii) Ba(OH)2 gives ttwo moles of OH- on the dissociation as

Ba(OH)2 ----- > Ba^2+ + 2OH-

Therefore when the equimolar qunatities of the ethanoic acid and Ba(OH)2 are used with same volume then moles of OH- present to react are twice the moles of ethanoic acid therefore after the reaction OH- remain in the solution and hence the solution become basic.

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