When solid PbCl2 is add lead ion and the acetate

1) Please don't provide handwrittren solution...

0.2 mL of 0.10M NaOH is needed to titrate an unknown acid with a volume of 10.15mL. The final concentration of the resulting titrated sample is 0.163. Kindly explain how that value was found.

For each scenario below, select the color of the solution using the indicator thymol blue during the titration. When you first add indicator to your Na2CO3 solution, the solution is basic (pH ~10), and the color is [Select] At the equivalence point for the titration, the moles of added HCI are equal to the moles of Na2CO3. One drop (or less!) past this is called the endpoint. The added HCI begins to titrate the thymol blue indicator itself. At the endpoint, the indicator color is [Select] When you weren't paying attention and added too much HCI (~12 mL extra), the color is [Select] When you really weren't paying attention and reached the second equivalence point of Na2CO3, the color is ✓ [Select] blue yellow red orange green Question 9

What ratio of base to acid is needed to make a buffer with formic acid, HCOOH, and potassium formate, KHCOO buffer with pH = 3.76? Enter the ratio as a decimal

In a titration experiment discuss how the indicator (Phenolphthalein) works and how it helps identify the end point/equivalence point?