Question

How can you prepare( m/20) 500 cc solution of na2co3?

Answer 1

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Answer 2

Answer: Dissolve 2.65- grams of Na2CO3 in water, dissolve well and make up to 500 ml in a standard flask. You will get M/20 Na2CO3.

Explanation:

Molecular weight of Na2CO3= 106

Molarity (M)= w2/M2 x 1000/V

We know M= 1/20; M2= 106; V= 500;

So w2=1/20 x 106 x500/1000 =2.65-g