Calcium chloride when dissolved in water dissociates into its ions according to the following equation.
Calcium chloride when dissolved in water dissociates into its ions according to the following equation.
CaCl2 (aq) →Ca2+ (aq) 2Cl− (aq)
Calculate the number of ions obtained from CaCl2 when 222 g of it is dissolved in water.
Ans. 1 mole of calcium chloride = 111g
∴ 222g of CaCl2 is equivalent to 2 moles of CaCl2
Since 1 formula unit CaCl2 gives 3 ions, therefore, 1 mol of CaCl2 will give 3 moles of ions
2 moles of CaCl2 would give 3 ×2 = 6 moles of ions.
No. of ions = No. of moles of ions × Avogadro number
= 6 × 6.022 × 1023
= 36.132 × 1023
= 3.6132 × 1024 ions
