. What is the equivalent weight of metal


6.90 gm of metal carbonate were dissolved in 60 ml of 2 N HCl. The excess acid was neutralized by 20 ml of 1 N NaOH

A. 40

B. 20

C. 19

D. 39

Best Answer

Ans: D

Sol: Equivalent of HCl taken = 60 x 2 x 10-3

Equivalent of HCl present after the reaction= 20 x 1 x 10-3

Equivalent of HCl utilized = 100 × 10–3

100 × 10–3 equivalent of metal carbonate = 6.90 gm

1 equivalent of metal carbonate= 6.90/10-1= 69 gm 

Equivalent weight of metal = 69 – 30 = 39

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