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Why we have to take 42gm of sodium hydroxide instead of 40gm for preparation of 1M Sodium hydroxide as per Pharmacopia? Whether it means the formula for calculating molarity was wrong?
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Answer Posted / phani kumar
In 1molar NaOH solution we take 42gms NaOH in 1000ml water.why because NaOH pellets having 97% purity
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