One mole of each of the following compounds is added to water in seperate flanks to make 1.0L of solution. Which solution has the largest total ion concentration?

Question

1. CaCO3
2. Al(NO3)3
3. Ba(OH)2
4. AgCl
5. BaCl

Answer 1

CaCO₃ ==> Ca²⁺ + CO3^2- = 2 ions

Al(NO₃)₃ ==> Al³⁺ + 3NO₃^- = 4 ions

Ba(OH)₂ ==> Ba²⁺ + 2OH^- = 3 ions

AgCl ==> Ag⁺ + Cl^- = 2 ions

BaCl₂ ==> Ba²⁺ 2Cl^- = 3 ions (note: BaCl does not exist)

ANSWER: the one with 4 ions has the highest total ion concentration.