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)`:

`"45.0 g conc HNO"_(3)`

`"90.0 g conc HNO"_(3)`

`"70.0 g conc HNO"_(3)`

`"54.0 g conc HNO"_(3)`

Text Solution

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The correct Answer is:

250 mL of 2.0 M `HNO_(3)` will contain `HNO_(3)`
`=(2)/(1000)xx250=?0.5 mol "=0.5xx63 g = 31.5g`
As concentrated `HNO_(3)` is `70%` , therefore, concentrated `HNO_(3)` required `=(100)/(70)xx31.5g=45g`

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

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

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

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

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

How many games of concentrated nitric acid solution should be used to prepare 2.50 ml of 2.0 M HNO_(s) ?The concentrated acid is 70 % HNO_(3) .

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

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

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

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

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

54.0 g conc. `HNO_(3)`

45.0 g conc. `HNO_(3)`

90.0 g conc. `HNO_(3)`

70.0 g conc. `HNO_(3)`