Question

How many gm of silver will be displaced from a solution of $AgNO_3$ by $4\, gm$ of magnesium?

• A. 18 gm
• B. 4 gm
• C. 36 gm
• D. 16 gm

Answer 1

Answer: (C)

36 gm

Answer 2

Given: Weight of magnesium = $4 \,gm$, We know that $\frac{\text { Weight of silver displaced }(M)}{\text { Weight of magnesium }}$ $=\frac{\text { Equivalent weight of silver }}{\text { Equivalent weight of magnesium }}$ or $\frac{M}{4}=\frac{108}{12}$ or $M=\frac{108 \times 4}{12}=36 \,gm$