Question

Reactions of Carboxylic Acids and Their Derivatives Part A. Carboxylic Acid Salts 1. Salt Formation Compound Solvent Solubility Benzoic acid Cold Water Benzoic acid 10% NaOH 2. Salt Hydrolysis Sodium acetate solution changed the color of litmus from to Questions 1. Write an equation that accounts for the solubility of benzoic acid in aqueous base. 2. What would you expect to happen if a solution of sodium benzoate were acidified? Write an equation. 3. Explain how a water-insoluble organic acid might be freed of non-acidic impurities, use your answers from question 1 and 2 to find the answer. 4. Was the aqueous solution acetate acidic or alkaline? 5. Explain why, write an equation.

Answer 1

Compound Solvent Solubility ч. Аа Cold water Insoluble Benzoic Benzoic acid acid На че 10% NOOH Soluble and SOL 2. Man CH₃ Coona & H2O = NOOH + CH₃ CoolH As NaOH is a strong base and CH ₂ Cool is a weak acid, the resultant solution is basic in nature. • In acidic solution, blue litmus paper turns red and in basic solution red litmus paper twind blue. I Calth COOH (s) + NaOH (aq) Cettaccoona (og) + H2O (1) This benzoic and is soluble in aq base: 2C6 HE COONa + H₂Soy 26 HE COOH + NO₂ Soy Cohn Coona (aq) + HCl (aq) - CG Hocoon (s) + Nach [oq) when sodium benzoat were precipitated will obtain. acidified , a write 3. Organic aida do not dissociate completely in water. Lower molecular mass organic acid are slightly soluble in water but higher moleculas mass organic acid are insoluble in organic molecue are generally non polan and repelled by water. Ton from the above two equation, liberating Carbon dioxide and forming soluble salts.

4. Aqueous solution acetate is alkaline in nature, CH₃COONa + H2O - NooH + CH₃COOH Aquears solution of sodium acetate desociate NaOH and the coolt as Nooh is a strong base and Ctz cool is a weak acid, the resultant solation is basic / alkaline in nature.