A Buffer Is Composed of 0

question 51

Multiple Choice

A buffer is composed of 0.400 mol H₂PO₄^- and 0.400 mol HPO₄^2- diluted with water to a volume of 1.00 L.The pH of the buffer is 7.210.How many moles of HCl must be added to decrease the pH to 6.210?

• A) 0.200 mol
• B) 0.327 mol
• C) 0.360 mol
• D) 0.400 mol
• E) 3.60 mol

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