[swtpnay860]

1. What is the pH of the micture if 10.00ml of 0.100M NaOH is added to 20.00 ml, 0.10M ascorbic acid solution?

2. What mass of a weak acid with a molar mass of 100.0g/mol is necessary to neutralize 35.0 ml of 0.100M NaOH solution?

3. What is the pH of 0.150g NaC2H3O2 in 100-ml H2O?

Thank YOu

[AWK]

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[mdlhvn]

Hard to answer.
1. You must have K_eq of ascorbic acid to determine pH.

2. Hardly have I listened using a weak acid to neutralize a strong base. It is recommended to use strong acid since "neutralize" almost means to make a 7-pH solution. In this case, if you use  350mg weak acid to react sufficiently with NaOH, we scarely have a 7-pH solution but a weak base solution. However, If you have K_eq of weak acid, you can calculate the amount of this to add to NaOH solution to make a nearly 7-pH solution

3.Similarily, we need K_eq1 and K_eq2 of H2CO3.

[AWK]

1. You have ascorbate buffer based on pK₁ (pH in this case eqals to pK₁ exactly). Why?

2. Which weak acid you want to use - monobasic, dibasic? - answers will be different.

3. Calculate concentration, then pH of hydrolysis od sodium acetate