Question

Which of the following ionic compound contain largest number is ions?
A) 11.1g of CaCl2
B) 0.1 mol of KI
C) 0.1 mol of AlPO4
D) 0.1 mol of SrCO3

Answer 1

11.1g of CaCl2 contains the maximum number of ions.

• 11.1g of CaCl2 = 11.1 / 111 moles of CaCl₂ = 0.1 mole of CaCl₂.

1 mole of CaCl₂ gives 3 moles of ions ( Ca²⁺, Cl⁻, and Cl⁻)

So 0.1 moles produce 0.3 moles of ions.

• 1 mole of KI produces 2 moles of ions (K⁺ and I⁻)

So, 0.1 mol of KI produces 0.2 moles of ions.

• 1 mole of AlPO₄ produces 2 moles of ions (Al³⁺ and PO₄³⁻)

So, 0.1 mol of AlPO₄ produces 0.2 moles of ions.

• 1 mole of SrCO3 produces 2 moles of ions (Sr²⁺ and CO₃²⁻)

So, 0.1 moles of SrCO3 produces 2 moles of ions.