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How many grams of concentrated nitric ac...

How many grams of concentrated nitric acid solution should be used to prepare `250 mL` of `2.0 M HNO_(3)`? The concentrated acid is `70% HNO_(3)`:

A

`70.0` g conc. `HNO_(3)`

B

`54.0` g conc. `HNO_(3)`

C

`45.0` g conc. `HNO_(3)`

D

`90.0` g conc. `HNO_(3)`

Text Solution

Verified by Experts

The correct Answer is:
C
Molarity = `(W xx 1000)/(M xx V)`
`2 = W/63 xx1000/250`
`W = 63/2 `
Because 70 % `HNO_(P)`
Mass of acid ` xx 70/100 =63/2 `
Mass of acid = 45 g
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