Question

When copper metal is added to silver nitrate in solution, silver metal & copper (ii) nitrate are produced. What mass of silver is produced from 100 g Cu?

Answer 1

`\large \boxed{\text{339 g}}`

Step-by-step explanation:

We will need a balanced chemical equation with masses and molar masses, so, let's gather all the information in one place.

MM: 63.55 107.87

Cu + 2AgNO₃ ⟶ Cu(NO₃)₂ + 2Ag

m/g: 100

(a) Moles of Cu

`\text{Moles of Cu} = \text{100 g Cu }* \frac{\text{1 mol Cu}}{\text{63.55 g Cu}}= \text{1.574 mol Cu}`

(b) Moles of Ag

`\text{Moles of Ag} = \text{1.574 mol Cu} * \frac{\text{2 mol Ag}}{\text{1 mol Cu}} = \text{3.147 mol Ag}`

(c) Mass of Ag

`\text{Mass of Ag} =\text{3.147 mol Ag} * \frac{\text{107.87 g Ag}}{\text{1 mol Ag}} = \textbf{339 g Ag}\\\\\text{The reaction produces $\large \boxed{\textbf{339 g}}$ of Ag}`