The concentration of 20 mL of HCl is determined by titrating with NaOH. The titration reaches its endpoint after adding 10.1 mL of 0.859 M NaOH. What was the original concentration of the HCl

Explanation:

The reaction equation for this reaction is as follows.

The given data is as follows.

        = ?,     = 20 ml

        = 0.859 M,     = 10.1 ml

Hence, we will calculate the original concentration of HCl as follows.

        = 0.434 M

Thus, we can conclude that the original concentration of the HCl is 0.434 M.

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since electrons are negative the answer is neagtaive