General Chemistry
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Which of the following is a buffer?
A solution made by mixing 100 mL of 0.150 M CH3COOH and 500 mL of 0.150 M NaOH
A solution made by mixing 100 mL of 0.150 M CH3COOH and 50 mL of 0.150 M NaOH
A solution made by mixing 100 mL of 0.150 M CH3COOH and 50 mL of 0.150 M HCl
A solution made by mixing 100 mL of 0.150 M CH3COOK and 50 mL of 0.150 M KCl