30.03.2023 - 07:35

Why is it necessary to standardize a NaOH solution? (Why do you not know a precise molarity if you use a precise mass balance?)

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Why is it necessary to standardize a NaOH solution? (Why do you not know a precise molarity if you use a precise mass balance?)

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  • Golden-Boy
    April 4, 2023 в 11:01

    It is necessary to standardize a NaOH (Sodium Hydroxide) solution because the purity of the NaOH may vary from batch to batch, and impurities may be present in the substance that can affect its molarity. Standardization involves accurately determining the concentration of the NaOH solution by reacting it with a known quantity of a substance of known purity and concentration, typically an acid.

    Using a precise mass balance to measure the amount of NaOH used may not provide an accurate molarity because the mass of impurities in the substance may also be measured along with the NaOH. This can lead to an overestimation or underestimation of the molarity of the solution, and therefore, the amount of substance present in a given volume of the solution.

    Standardizing the NaOH solution helps to ensure that the molarity is accurately determined and that subsequent experiments and calculations based on that molarity are reliable. This is particularly important in analytical chemistry, where precise and accurate measurements are essential for obtaining valid results.

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