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A100 ml solution of H2SO4 having concentration of 20% is mixed with a 50% concentrated x ml mixture such that the net mixture is 30% concentrated. Det
Question

A100 ml solution of H2SO4 having concentration of 20% is mixed with a 50% concentrated x ml mixture such that the net mixture is 30% concentrated. Determine x.

A.

70 ml

B.

80 ml

C.

60 ml

D.

50 ml

Correct option is D

Given:

A 100 ml solution of H2SO4 having concentration of 20% is mixed with a 50% concentrated x ml mixture

Such that the net mixture is 30% concentrated

Concept used:

C1V1 + C2V2 = C3V3

Solution:

According to the question,

(100 × 20) + (50 × x) = 30 × (100 + x) 

=> 2000 + 50x = 3000 + 30x

=> 50x - 30x = 3000 - 2000

=> 20x = 1000

=> x = 1000/20 = 50 ml

∴ The value of x is 50 ml. 

Alternative Method:

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