A sample of Ca (s) is added to water to make a 150. mL solution. Thymol blue indicator is added to the solution. The solution is

Question

A sample of Ca (s) is added to water to make a 150. mL solution. Thymol blue indicator is added to the solution. The solution is then titrated with 1.00 M HCI. The initial reading of the burette is 5.00 mL before the titration, and when the color of the solution is observed to change from blue to yellow, the burette reads 38.91 mL. Determine the concentration (in mol/L) of hydroxide ions, [OH-], in the 150. mL solution. Do NOT include units in your answer. If you round during your calculation, be sure to keep at least three (3) decimal places. Report your answer to two (2) decimal places. Answer:

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