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24 November, 04:08

A student adds 10 mL of hydrochloric acid to a 20 ml sodium hydroxide solution. What will most likely happen to the pH of the solution?

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  1. 24 November, 06:42
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    Answer: The pH decreases

    Explanation:

    - Hydrochloric acid, as an acid has a pH value below 7

    - Sodium hydroxide, as an alkali has a pH value above 7.

    The alkali neutralizes the acid to give a salt as in the equation:

    HCl (aq) + NaOH (aq) - -> NaCl (aq) + H2O (l)

    Hence, the aqeous sodium chloride, NaCl has a pH value of 7 (neutral) which is then a decrease from the above 7 pH value of the sodium hydroxide solution.

    Thus, the pH decreases
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