How many milliliters of 0.100 M HCl should be added to 5.00 g of sodium acetate (82.03 g/mol) to prepare a pH 5.00 buffer? Given pKa of acetic acid is 4.75. pls help me I don't know the answer

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A buffer is prepared by mixing 43.2 mL of 0.196 M NaOH with 141.2 mL of 0.231 M acetic acid. Calculate the pH of this buffer after the addition of 0.166 g of solid NaOH. (The pKa for acetic acid is 4.75.) (please type answer not write by hend)

For each of the buffer systems below, determine the concentration of the acid and base components in the buffer: 1) An acetate buffer with a pH of 5.15 and a concentration of 3.5M. The (HC2H302] = Type your answer here M and the [NAC2H302] = Type your answer here M 2) A Carbonate buffer with a pH of 9.85 and a concentration of 0.50M. The [NAHCO3] = Type your answer here M and the Na2CO3] = Type your answer here M 3) A Phosphate buffer of pH 2.5 and a concentration of 1.0M. The [H3PO4] = Type your answer here Mand the [KH2PO4) Type your answer here