Answer:
We need 0.68 moles of aluminium ions to be present to make 0.34 moles Al2(SO4)3
Explanation:
Step 1: Data given
Number of moles Al2(SO4)3 = 0.34 moles
Step 2: The balanced equation
2Al + 3H2SO4 = Al2(SO4)3 + 3H2
Step 3: Calculate the number of moles aluminium ions
For 2 moles we need 3 moles H2SO4 to produce 1 mol Al2(SO4)3 and 3 moles H2
For 0.34 moles Al2(SO4)3 we need 2*0.34 = 0.68 moles aluminium
We need 0.68 moles of aluminium ions to be present to make 0.34 moles Al2(SO4)3
