How many grams of concentrated nitric acid solution should be used to prepare 250 mL of 2.0 M HNO3? The concentrated acid is 70% HNO3.
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250 mL of 2.0 M HNO₃ will contain HNO₃
= 2 × 1000 × 250 = 0.5 mol
= 0.5 × 63 g = 31.5 g
As concentrated HNO₃ is 70%, therefore concentrated HNO₃ required
= 100 / 70 × 31.5 g
FINAL RESULT = 45 g
Hope it helps you !!
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