Question: Please solve this problem for a student to understand not for expert. Sometimes the answer is wrong. Please be careful. I will give you like

Please solve this problem for a student to understand not for expert. Sometimes the answer is wrong. Please be careful. I will give you like for you solution. Thanks!
A 50.00 mL sample of ascorbic acid (H2C6H606) is titrated with 0.1200 M KOH. The second stoichiometric point is reached with the addition of 36.00 mL of base. At 9.00 mL of base added, pH = 4.10. At 27.00 mL of base added, pH = 11.80. (a) What is the concentration of the original acid solution? (b) What was the initial pH of the acid solution? (c) What is the pH at the second stoichiometric point? (d) What volume of base was needed to reach the first stoichiometric point? (e) What is the pH at the first stoichiometric point
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