A buffer is prepared by mixing 0.250 mol of acetic acid ($K_a = 1.8\times10^{-5}$) with 0.150 mol of sodium acetate in 1.00 L of water. (a) Calculate the initial pH of the buffer. (b) After adding 0.050 mol of HCl to the solution, what is the new pH? Assume volumes are additive.

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Initial pH ≈ 4.52; after HCl addition pH ≈ 4.27

Neco 2025 Chemistry Question 49

A buffer is prepared by mixing 0.250 mol of acetic acid (\(K_a = 1.8\times10^{-5}\)) with 0.150 mol of sodium acetate in 1.00 L of water. (a) Calculate the initial pH of the buffer. (b) After adding 0.050 mol of HCl to the solution, what is the new pH? Assume volumes are additive.

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Neco 2025 Chemistry Question 49

A buffer is prepared by mixing 0.250 mol of acetic acid (\(K_a = 1.8\times10^{-5}\)) with 0.150 mol of sodium acetate in 1.00 L of water. (a) Calculate the initial pH of the buffer. (b) After adding 0.050 mol of HCl to the solution, what is the new pH? Assume volumes are additive.

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Master the Exam!

A buffer is prepared by mixing 0.250 mol of acetic acid (\(K_a = 1.8\times10^{-5}\)) with 0.150 mol of sodium acetate in 1.00 L of water. (a) Calculate the initial pH of the buffer. (b) After adding 0.050 mol of HCl to the solution, what is the new pH? Assume volumes are additive.