Aluminum sulfate, Al₂(SO₄)₃, is used in tanning leather, purifying water, and manufacture of antiperspirants. Calculate its molar mass.

Question

Quizplus · Accepted Answer

To calculate the molar mass of aluminum sulfate, we need to add up the atomic masses of all the elements present in the compound. Aluminum (Al) has an atomic mass of 26.98 g/mol. Sulfur (S) has an atomic mass of 32.06 g/mol. Oxygen (O) has an atomic mass of 16.00 g/mol. Al₂(SO₄)₃ can be simplified as: Al2(SO4)3 So, the molar mass of aluminum sulfate is: 2(26.98 g/mol) + 3(32.06 g/mol + 4(16.00 g/mol)) = 2(26.98 g/mol) + 3(32.06 g/mol + 64.00 g/mol) = 2(26.98 g/mol) + 3(96.06 g/mol) = 53.96 g/mol + 288.18 g/mol = 342.14 g/mol Therefore, the best choice is B.

Aluminum Sulfate, Al2(SO4)3, Is Used in Tanning Leather, Purifying Water

Aluminum Sulfate, Al₂(SO₄)₃, Is Used in Tanning Leather, Purifying Water