9. What is the total number of grams of NaOH (formula mass = 40.) needed to make 1.0 liter of a 0.20 M solution? (1) 20. g (2) 2

Question

9. What is the total number of grams of NaOH (formula mass = 40.) needed to make 1.0 liter of a 0.20 M solution?

(1) 20. g (2) 2.0 g (3) 80. g (4) 8.0 g​

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Mít Mít 3 years 2021-07-27T14:58:39+00:00 1 Answers 68 views 0

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  1. bonexptip
    0
    2021-07-27T15:00:15+00:00
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    Answer:

    8 gram

    Explanation:

    in case of NaOH, normality=molarity

    so normality=molarity×acidity or basicity(in case of NaOH it’s 1)

    then

    weight of NaOH required = volume in ml × equivalent weight × normality / 1000

    so

    1000× 40× 0.2/1000

    =8 gram

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