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pH Problem!! Please help!!? Given that carbonic acid, H2CO3, has a pKa1 = 6.37 and a pKa2 = 10.33, please answer a and b below. If you began with 3.5 mL of 0.38 M NaHCO3, how many mL of .1 M HCl need to add to get a pH 7 buffer? I know I have to use the first pKa value, and the pH=pKa +...

pH Problem!! Please help!!? Given that carbonic acid, H2CO3, has a pKa1 = 6.37 and a pKa2 = 10.33, please answer a and b below. If you began with 3.5 mL of 0.38 M NaHCO3, how many mL of .1 M HCl need to add to get a pH 7 buffer? I know I have to use the first pKa value, and the pH=pKa +...