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1)Ascorbic acid (vitamin C, C6H8O6) is a diprotic acid (Ka1=8.00*10^-5 and Ka2=1.60*10^-12). What is the pH of a 0.260 M solution of ascorbic acid?

2) What is the concentration of ammonia in a solution if 21.80 mL of a 0.1160 M solution of HCl are needed to titrate a 100.0 mL sample of the solution?

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