Question Formic acid () is an organic acid secreted by ants

Question

Formic acid ( ${rm HCO_2H}$ ) is an organic acid secreted by ants and stinging nettles.

Part A

Calculate the {rm pH}

in 0.25

${rm HCO_2H}$ ( $K_{rm a} = 1.8 times 10^{-4}$ ).

Express your answer using two decimal places.

Part B

Calculate the concentrations of all species present ( ${rm HCO_2H}$ , ${rm HCO_2^-}$ , ${rm H_3O^+}$ , and ${rm OH^-}$ ) in 0.25 {rm M}

${rm HCO_2H}$ .

Express your answers using two significant figures. Enter your answers numerically separated by commas.

Part C

Also calculate the percent dissociation.

Express your answer using two significant figures.