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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
`M = (Wxx1000)/(M_w xxV_("sol (mL)")) implies 2= ("Mass")/63 xx 1000/250`
Mass `= 63/2 g`
Mass of acid `xx70/100 = 63/2`
Mass of acid = 45 g
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