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What quantity (in mL) of a 45% acid solu...

What quantity (in mL) of a 45% acid solution of a mono-protic strong acid must be mixed with a 20% solution of the same acid to produce 800 mL of a 29.875% acid solution?

A

320

B

325

C

316

D

330

Text Solution

Verified by Experts

The correct Answer is:
C
Mass of acid in xmL of 45% acid solution is `(45x)/(100)`
Mass of acids in (800 - x) of 20% acid solution is `(20(800-x))/(100)`
And mass of acid in 800 mL of 29.875% acid
`rArr 29.875 xx 8 = 239` gm , So, `(45x)/(100) + (20(800 - x))/(100) = 239 rArr x = 316 xmL`
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