CBSE Class 12-science Answered
How many gram of concentrated nitric acid solution should be used to prepare 500 ml of 2.0 M HNO3? The concentrated acid is 70 % HNO3. 1) 45.0 g conc. HNO3 2) 90.0 g conc. HNO3 3) 70.0 g conc. HNO3 4) 50.0 g conc. HNO3
Asked by okvgom | 22 Apr, 2020, 12:18: PM
Expert Answer
No. of moles = molarity × volume
No. of moles = 2×500/1000
= 1
Requird mass of HNO3 = 1 × 63
= 63 gm
70 gm of HNO3 are present in 100 gm of solution,
So 1 gm will be present in 100/70 gm of solution.
63 gm be present in (100/70)× 63 gm of solution
= 90 gm
Answered by Ravi | 22 Apr, 2020, 08:47: PM
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