Formic acid (HCO_2 H) is a weak acid found in the venom of bees and ant stings.

Question

Formic acid (HCO_2 H) is a weak acid found in the venom of bees and ant stings. Which of the following is an accurate statement concerning an aqueous solution of formic acid is? HCO_2 H(aq) + H_2 O(l) rightharpoonoverleftharpoon H_3 O^+ (aq) HCO_2^- (aq) K_a = 1.8 times 10^-4 The reaction between formic acid and water is slow, due to the low value for K_a. A formic acid solution predominantly contains undissociated HCO_2 H molecules. A formic acid solution predominantly contains H_3 O^+ and HCO_2^+ ions. A formic acid solution contains a greater concentration of dissolved ions than it does neutral formic acid molecules A formic acid solution contains equal amounts of H_3 O^+ and HC_2 H. HCl is a strong electrolyte. A bottle of HC1 contains the label 0.015 M HCl(aq). Which s concerning this HCl solution is FALSE? The solution is acidic The pH of the solution is 1.5 The hydronium ion concentration in this solution is 0.015 M. The solution has a higher concentration of hydronium ions than hydroxide ions

Explanation / Answer

27)

Formic acid is a weak acid becuase its Ka value is smaller . So, it dissociates partially.

So, at equilibrium, undissociated formic acid is predominant and formate ion and hydronium ions are equal in concentrations.

Answers: Options are A, B and E

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