2.1 g of sodium reacts with magnesium chloride. What mass of sodium chloride is produced?

Question

B) If 5.00 g of magnesium chloride react how much magnesium is produced?

Answer 1

As always, let us begin with the balanced chemical equation:

2Na + MgCl₂ → 2NaCl + Mg

A) For 2.1 g of Na:

2.1 g Na x (1 mol Na/23 g Na) x (2 mol NaCl/2 mol Na) x (58.44 g NaCl/1 mol NaCl) =

5.34 g NaCl

B) For 5.00 g of MgCl₂:

5.00 g MgCl₂ x (1 mol MgCl₂/95.211 g MgCl₂) x (1 mol Mg/1 mol MgCl₂) x (24.305 g Mg/1 mol Mg) =

1.28 g Mg