Formic acid (HCO 2 H) is a weak acid found in the venom of bees and ant stings.

Question

Formic acid (HCO2H) 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?

a.The reaction between formic acid and water is slow, due to the low value for Ka.

b.A formic acid solution predominantly contains undissociated HCO2H molecules.

c.A formic acid solution predominantly contains H3O+ and HCO2 ions.

d.A formic acid solution contains a greater concentration of dissolved ions than it does neutral formic acid molecules.

e.A formic acid solution contains equal amounts of H3O+ and HCO2H.

I know its not D.

Explanation / Answer

An accurate statement concerning an aqueous solution of formic acid is c. c.A formic acid solution predominantly contains H3O+ and HCO2 ions.

Because formic acid is an example of weak acid which is partially dissociates thus there no much H3O+ and HCO2 ions.

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