Following the procedure, a student recorded the initial volume of sodium hydroxide in his buret as 0.15 mL. He then titrated a 15.00 mL sample of 0.1027 M hydrochloric acid until a persistent pale pink appeared. He recorded the final volume of sodium hydroxide in his buret as 23.93 mL. What is the concentration (M) of his sodium hydroxide solution? Report you answer with four places after the decimal.

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