CBSE Class 12-science Answered
How many grams of concentrated NITRIC ACID solution should be used to prepare 250ml of 2M NITRIC ACID ? The concentrated acid is 70% NITRIC ACID {HNO3}
Asked by pardeepkumar2281 | 13 May, 2018, 08:01: AM
Expert Answer
No. of moles = (250×1000)/2
= 0.5 moles
No. of moles = molarity × volume
Requird mass of HNO3 = 0.5 × 63
= 31.5 gm
70 gm of HNO3 are present in 100 gm of solution,
So 1 gm will be present in 100/70 gm of solution.
31.5 gm be present in (100/70)× 31.5 gm of solution
= 45 gm
Answered by Varsha | 13 May, 2018, 09:02: PM
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