Test Index

NCERT Class XII Chemistry
Chapter - Solutions
Questions with Solutions

© examsnet.com
Question : 4
Total: 53
Concentrated nitric acid used in the laboratory is 68% nitric acid by mass in aqueous solution. What should be the molarity of such a sample of the acid if the density of the solution is 1.504 g mL ‌–1 ?
Solution:  
Let mass of solution = 100 g
Then mass of nitric acid = 68 g
Molar mass of HNO3=63g mol‌–1
Number of moles of HNO3=
68
63
=1.079mole
Density of solution = 1.504 g mL‌–1
∴ Volume of solution =
100g
1.504gmL−1
 = 66.5 mL = 0.0665 L
Molarity of the solution =
Number of moles of the solute
Volume of solution in L
 =
1.079
0.0665
 = 16.23 M
© examsnet.com
Go to Question:
Prev Question
Next Question