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To simulate the pH of blood, which is 7
To simulate the pH of blood, which is 7.4, an undergraduate researcher in a biology lab produced a buffer solution by first dissolving 90.0 g sodium dihydrogen phosphate (NaH2PO4, Ka = 6.2 × 10-8) in 700 mL of water.
(a) What mass (in grams) of sodium hydrogen phosphate (Na2HPO4) would need to be added to reach the desired pH? Assume no change in volume during the addition.
(b) how many moles of NaOH can be added before the pH rises beyond 7.6?
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