Una disolución contiene 40% de ácido acético en masa. La densidad de la disolución es de 1.049 g/mL a 20°C. Calcule la masa de ácido acético

Question

Una disolución contiene 40% de ácido acético en masa. La densidad de la disolución es de 1.049 g/mL a 20°C. Calcule la masa de ácido acético puro que hay en 125 mL de esta disolución

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Diễm Thu 3 years 2021-08-30T23:55:49+00:00 1 Answers 14 views 0

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    2021-08-30T23:56:51+00:00

    Answer:

    52.45g

    Explanation:

    The computation of the mass of pure acetic acid in 125mL of this solution is shown below:

    The percentage of mass would be equivalent to the g of solute in each 100g of water

    As we know that

    density = mass ÷ volume

    So,

    Volume = mass ÷ density

    V = 100g / 1.049 (g / ml)

    V = 95.328 mL

    Now In every 95,328 ml of C_2H_4O_2 there are 40g of C_2H_4O_2

    i.e.

    each 125ml of C_2H_4O_2 there are 52.45g

    SO,

    x = 40g. 125ml ÷ 95.328

    x = 52.45g

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