Answer:
55.73 g
Explanation:
Given data:
Mass of calcium chloride = 47.2 g
Mass of nickel arsenate= 135.2 g
Mass of nickel chloride produced = ?
Solution:
Chemical equation:
3CaCl₂ + Ni₃(AsO₄)₂ → 3NiCl₂ + Ca₃(AsO₄)₂
Number of moles of CaCl₂:
Number of moles = mass/ molar mass
Number of moles = 47.2 g/ 110.98 g/mol
Number of moles = 0.43 mol
Number of moles of Ni₃(AsO₄)₂:
Number of moles = mass/ molar mass
Number of moles = 135.2 g/ 453.92 g/mol
Number of moles = 0.3 mol
Now we will compare the moles of nickel chloride with both reactant from balance chemical equation:
CaCl₂ : NiCl₂
3 : 3
0.43 : 0.43
Ni₃(AsO₄)₂ : NiCl₂
1 : 3
0.3 : 3×0.3 = 0.9
Number of moles of NiCl₂ produced by calcium chloride are less so CaCl₂ is limiting reactant.
Mass of NiCl₂:
Mass = number of moles × molar mass
Mass = 0.43 mol × 129.6 g/mol
Mass = 55.73 g
