(c). The chemist prepares 1dm3 of a buffer solution by mixing 200 cm3 of 0.200 mol dm−3 HNO2 with 800 cm3 of 0.0625 mol dm−3 sodium nitrite, NaNO2. i. Calculate the pH of the buffer solution. Give your answer to two decimal places.
(c). The chemist prepares 1dm3 of a buffer solution by mixing 200 cm3 of 0.200 mol dm−3 HNO2 with 800 cm3 of 0.0625 mol dm−3 sodium nitrite, NaNO2. i. Calculate the pH of the buffer solution. Give your answer to two decimal places. ka = 4.69 × 10−4 and the answer is 3.43 ✔