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do all parts please 1. Pyrophosphoric acid, H4P207, is a polyprotic acid; at 25C, K1 = 1.2x10-1, Kaz = 7.9x10-, K3 = 2.010-7, K4 =

do all parts please

1. Pyrophosphoric acid, H4P207, is a polyprotic acid; at 25C, K1 = 1.2x10-1, Kaz = 7.9x10-, K3 = 2.010-7, K4 = 4.8x10-10. a. (2 marks) 25.0 mL of 0.25 M solution of H4PO7 is titrated with 0.25 M NaOH. What is the pH after 100.0 mL of NaOH is added? b. (2 marks) A buffer is made by adding 540 mL of 1.0 M NaHP07 to 210 mL of 1.0 M NaH3P07. What volume of 1.3 M HCl can be added before the pH of the buffer changes by 0.50 pH units?

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