Calculate the mass percentage of the sulfate ion in MgSO4.

The answer to your question is 80%

Explanation:

Data

mass percent of SO₄⁻²

molecule  MgSO₄

Process

1.- Calculate the molecular mass of magnesium nitrate

molecular mass = (1 x 24) + (1 x 32) + (4 x 16)

                           = 24 + 32 + 64

                           = 120 g

2.- Calculate the molecular mass of sulfate ion

molecular mass = (1 x 32) + (4 x 16)

                          = 32 + 64

                          = 96

3.- Write a proportion to solve this problem

                    120 g of MgSO₄ 100 %

                      96 g of SO₄⁻²    x

                      x = (96 x 100) / 120

                      x = 80 %                  

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