Final answer:
The average reading of sodium hydroxide is used to calculate the concentration of hydrochloric acid in a neutralization reaction, allowing for the determination of the unknown concentration.
Explanation:
The average reading of sodium hydroxide is used to calculate the concentration of hydrochloric acid because in a neutralization reaction, the moles of the acid are equal to the moles of the base. This allows for the determination of the unknown concentration. By titrating known concentrations of sodium hydroxide with hydrochloric acid and measuring the volume used, we can calculate the concentration of the sodium hydroxide solution.
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