Which of the following aqueous mixtures will result in a buffer? X. 0.20 mol CH3COOH +...

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Which of the following aqueous mixtures will result in a buffer? X. 0.20 mol CH3COOH +...

Which of the following aqueous mixtures will result in a buffer?
X. 0.20 mol CH₃COOH + 0.10 mol NaOH in 1.00 L solution
Y. 0.20 mol NaOH + 0.10 mol CH₃COOH in 1.00 L solution
Z. 0.20 mol NH₃ + 0.10 mol HCl in 1.00 L solution

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