Electrolytic cells containing Zn and Al salt solutions are connected in series. If 6.5 ~g of Zn is deposited in one cell calculate mass of Al deposited in second cell (molar mass : Zn =65 , Al =27 ) by passing definite quantity of electricity?

Step-by-step solution

Cell 1: aligned & Zn _ ( m ) ²⁺+2 e ⁻ Zn _ ( s ) & ( mole ratio) )₁= 1 ~mol 2 ~mole ⁻ aligned Cell 2: aligned & Al _ ( sq ) ³⁺+3 e ⁻ Al _ ( s ) & ( mole ratio )₂= 1 ~mol 3 ~mole ⁻ aligned aligned & W ₁ ( mole ratio )₁ M ₁ = W ₂ ( mole ratio )₂ M ₂ & 6.5 ~g 1 ~mol / 2 ~mol e ⁻ 65 ~g ~mol ⁻¹ & = W ₂ 1 ~mol / 3 ~mol e ⁻ 27 ~g ~mol ⁻¹ & 6.5 ~g 2 65 = W ₂ 3 27 & ~W ₂= 6.5 2 27 65 3 =1.8 ~g aligned