How many grams of NaOH are contained in 5.0*10ml of a0. 77 sodium hydroxide solution

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How many grams of NaOH are contained in 5.0*10ml of a0. 77 sodium hydroxide solution

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Lệ Thu 3 years 2021-08-05T18:13:19+00:00 1 Answers 17 views 0

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  1. Sigrid
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    2021-08-05T18:15:01+00:00
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    Answer:

    1.54grams

    Explanation:

    Molarity of a solution = n/V

    Where;

    n = number of moles (mol)

    V = volume (L)

    Based on the information given in this question;

    Volume of NaOH solution = 5.0 × 10ml

    = 50ml = 50/1000 = 0.050 L

    Molarity = 0. 77 M

    Using; Molarity = n/V

    0.77 = n/0.05

    n = 0.77 × 0.05

    n = 0.0385mol

    To find the mass (grams) of NaOH in the solution, we use the following formula:

    mole (n) = mass/molar mass

    Molar mass of NaOH = 23 + 1 + 16 = 40g/mol

    0.0385 = mass/40

    mass = 0.0385 × 40

    mass = 1.54grams.

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