Copper and Silver Nitrate Reaction: Calculate Copper Moles

31 Oct 2021

How many moles of copper must react to form 3.50 mol of Ag?

0.175 mol

1.75 mol

7.00 mol

17.0 mol

Answer : The correct option is, 1.75 mol

Solution:

Given,

Moles of silver = 3.50 mol

The balanced chemical reaction is:

Cu + 2AgNO₃ → 2Ag + Cu(NO₃)₂

From the balanced chemical reaction, we conclude that:

2 moles of silver obtained from 1 mole of copper

So, 3.50 moles of silver obtained from 3.50 / 2 = 1.75 moles of copper

Therefore, 1.75 moles of copper must react to form 3.50 moles of silver.