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A student is given a sample of hydrochloric acid of unknown concentration, but they know it must be between 0.10 M and 0.20 M. They

A student is given a sample of hydrochloric acid of unknown concentration, but they know it must be between 0.10 M and 0.20 M. They titrate 25.0 mL of the acid with 0.150 M sodium hydroxide solution. They use phenolphthalein as an indicator, and the titration requires 34.2 mL of sodium hydroxide solution to reach the equivalence point. What is the concentration of the hydrochloric acid?

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