01m hcl is added into a mixture of 25ml of water and 25ml, Ask an Expert

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0.1M HCl is added into a mixture of 25mL of water and 25mL of Ca(OH)2. For the end point to be reached in the first test 1.5mL of 0.1M HCl is added into the mixture. The second time, 1.3mL is added to reach the end point. How would I calculate the molarity of the hydroxide ion (OH-) for the two tests?

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