Reaction, 2 B r - ( a q ) + C l 2 ( a q ) ⟶ 2 C l - ( a q ) + B r 2 ( a q ) , is used for commercial preparation of bromine from its salts. Suppose we have 50 mL of a 0.60 M solution of N a B r . What volume of a 0.050 M solution of C l 2 is needed to react completely with the B r ?

Question

Reaction, 2 B r - ( a q ) + C l 2 ( a q ) ⟶ 2 C l - ( a q ) + B r 2 ( a q ) , is used for commercial preparation of bromine from its salts. Suppose we have 50 mL of a 0.60 M solution of N a B r . What volume of a 0.050 M solution of C l 2 is needed to react completely with the B r ?, V = 500 mL, V = 400 mL, V = 200 mL, V = 300 mL

MARKS App · Accepted Answer

2 B r - + C l 2 ⟶ 2 C l - + B r 2 Or 2 B r - ⟶ B r 2 0 + 2 e (Valence factor for B r - = 1 ) C l 2 0 + 2 e ⟶ 2 C l - (Valence factor for C l 2 = 2 ) Meq. of C l 2 = Meq. of B r - 0.05 × 2 × V = 50 × 0.6 × 1 V = 300 mL.

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