One litre solution of MgCl2 is electrolyzed completely by passing a current of 1A for 16 min 5 sec. The original concentration of MgCl2 solution was (Atomic mass of Mg = 24)

Question

One litre solution of MgCl2 is electrolyzed completely by passing a current of 1A for 16 min 5 sec. The original concentration of MgCl2 solution was (Atomic mass of Mg = 24) (A) 0.5 × 10−3 M (B) 1.0 × 10−2 M (C) 5 × 10−3 M (D) 5 × 10−2 M

Tardigrade Admin · Accepted Answer

m=(EIZ/96500)=(12×1×965/96500)=12×10-2 g Molarity, M=(w2/M2)×(1000/Vsol)=(12×10-2/24)×(1000/1000)=0.5×10-2=5×10-3 M

Q. One litre solution of MgCl₂ is electrolyzed completely by passing a current of 1A for 16 min 5 sec. The original concentration of MgCl₂ solution was (Atomic mass of Mg = 24)

0.5 × 10⁻³ M

1.0 × 10⁻² M

5 × 10⁻³ M

5 × 10⁻² M

$m = \frac{E I Z}{96500} = \frac{12 \times 1 \times 965}{96500} = 12 \times 1 0^{- 2} g$
$M o l a r i t y, M = \frac{w _{2}}{M _{2}} \times \frac{1000}{V _{so l}} = \frac{12 \times 1 0 ^{- 2}}{24} \times \frac{1000}{1000} = 0.5 \times 1 0^{- 2} = 5 \times 1 0^{- 3} M$

Q. One litre solution of MgCl2 is electrolyzed completely by passing a current of 1A for 16 min 5 sec. The original concentration of MgCl2 solution was (Atomic mass of Mg = 24)

0.5 × 10−3 M

1.0 × 10−2 M

5 × 10−3 M

5 × 10−2 M