Question

How many grams of NaOH should be dissolved to make 100 cm3 of 0.15 M NaOH solution ?


(1) 0.2 g

(2) 0.4g

(3) 0.6 g

(4) 0.8 g​

Answer 1

Answer:

In 100mL100mL of 0.5MNaOH0.5MNaOH solution, there are 100ml×0.5molNaOHL=50mmolNaOH100ml×0.5molNaOHL=50mmolNaOH. Molar mass of NaOHNaOH = 40gmolNaOH40gmolNaOH. Mass of NaOHNaOH in 50mmol50mmol is 50×10−3×40g=2g50×10−3×40g=2g.

Explanation:

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Answer 2

Explanation:

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