Consider the reaction described by the chemical equation below.

Question

Consider the reaction described by the chemical equation below. Estimate the minimum amount (in grams) of TiCl4 needed to produce 132 millimoles of MgCl2.

2 Mg + TiCl4 → Ti + 2 MgCl2

a) 6.26 g

b) 12.5 g

c) 13.2 g

d) 25.0 g

e) 50.1 g

Answer 1

2 Mg + TiCl₄ → Ti + 2 MgCl₂ ... balanced equation

molar mass TiCl₄ = 189.7 g/mol

132 mmols MgCl₂ x 1 mmol TiCl₄ / 2 mmols MgCl₂ x 189.7 mg TiCl₄ / mmol x 1g / 1000 mg = 12.5 g TiCl₄

ANS: (b)