Question

When copper metal is added to silver nitrate
in solution, silver metal and copper(II) nitrate
are produced. What mass of silver is produced
from 52 g of Cu?
Answer in units of g.

Answer 1

Step 1: Write the chemical equation:

2Cu + AgNO₃ → Cu(NO₃)₂ + Ag

Step 2: Calculate the moles of Cu:

n(Cu) = mass/Ar

n(Cu) = 52 / 63.546

n(Cu)= 0.818 mol

Step 3: Find the mole ratio between Cu an Ag and figure out the moles of Ag

   Cu : Ag

    2   :   1

0.818 : 0.818 / 2

0.818 : 0.409

Thus, n(Ag) = 0.409 mol

Step 4: Find the mass of Ag:

Mass of Ag = moles × Ar.

Mass = 0.409 × 107.8682

Mass = 44.11g