Question

Ion Concentration 1. Which solution has the greatest [SO42-]: a) 0.075 M H2SO4 b) 0.15 M Na2SO4 c) 0.080 M Al2(SO4)3?

Answer 1

The solution with the greatest sulfate ion concentration is option c) 0.080 M Al2(SO4)3.

Step-by-step explanation:

To determine the solution with the greatest [SO42-], we need to look at the amount of sulfate ions in each solution. The formula for sulfuric acid is H2SO4, meaning that for every one mole of H2SO4, there are two moles of sulfate ions. Therefore, in a 0.075 M H2SO4 solution, there would be 2 * 0.075 = 0.15 M of sulfate ions. Similarly, in a 0.15 M Na2SO4 solution, there would be 1 * 0.15 = 0.15 M of sulfate ions. Lastly, in a 0.080 M Al2(SO4)3 solution, there would be 3 * 0.080 = 0.24 M of sulfate ions. Therefore, the solution with the greatest sulfate ion concentration is option c) 0.080 M Al2(SO4)3.

Answer 2

c) 0.080 M Al₂(SO₄)₃

Step-by-step explanation:

Ion [SO₄²⁻] concentration of each solution is:

a) 0.075 M H₂SO₄: [SO₄²⁻] = 0.075M. Because 1 mole of H₂SO₄ contains 1 mole of SO₄²⁻

b) 0.15 M Na₂SO₄: [SO₄²⁻] = 0.15M. Also, 1 mole of Na₂SO₄ contains 1 mole of SO₄²⁻

c) 0.080 M Al₂(SO₄)₃ [SO₄²⁻] = 0.080Mₓ3 = 0.240M. Because 1 mole of Al₂(SO₄)₃ contains 3 moles of SO₄²⁻.

Thus, the soluion that has the greatest [SO₄²⁻] is 0.080 M Al₂(SO₄)₃