Multiple Choice
What is the pH of the buffer that results when 12.0 g of NaH2PO4 and 8.00 g of Na2HPO4 are diluted with water to a volume of 0.50 L? (Ka of H2PO4- = 6.2 × 10-8,the molar masses of NaH2PO4 and Na2HPO4 are 120.0 g/mol and 142.0 mol,respectively)
A) 4.10
B) 6.96
C) 7.21
D) 7.46
E) 9.90
Correct Answer:
Verified
Correct Answer:
Verified
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