What volumes of 0.200 M HNO2 and 0.200 M NaNO2 are required to make 500. mL of a buffer solution with pH = 3.00? [Ka for HNO2 = 4.00 x 10–4] | Equilibrium | TheChemSolver

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Question

What volumes of 0.200 M HNO₂ and 0.200 M NaNO₂ are required to make 500. mL of a buffer solution with pH = 3.00? [Ka for HNO₂ = 4.00 x 10–4]

A.

mL of each

B.

143 mL of HNO₂ and 357 mL of NaNO₂

C.

mL of HNO₂ and 300. mL of NaNO₂

D.

357 mL of HNO₂ and 143 mL of NaNO₂

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