Concentration of sulphate ion

[xiphoid]

Homework Statement

The concentration of Al³⁺ ion in aqueous solution of Al₂(SO₄)₃ is 0.28M, Then the concentration of SO₄^2- ion in this solution will be?

Homework Equations

Al₂(SO₄)₃ → 2Al³⁺ + 3SO₄^2-

The Attempt at a Solution

What should i compare to start of with?

 

[AGNuke]

How many moles of sulphate ions are present in 1 mole Aluminium Sulphate?

 

[xiphoid]

3 moles, is this the answer?

How many moles of sulphate ions are present in 1 mole Aluminium Sulphate?

 

[Saitama]

3 moles, is this the answer?

How many moles of Aluminium Sulphate do you currently have?

 

[xiphoid]

1 mole

How many moles of Aluminium Sulphate do you currently have?

 

[Borek]

Take a look at the formula - how many moles of Al³⁺ and how many moles of SO₄^2- in 1 mole of Al₂(SO₄)₂? What is their ratio? Can you use this ratio to solve the problem?