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.
(1) 45.0 g conc. HNO3
(2) 90.0 g conc. HNO3
(3) 70.0 g conc. HNO3
(4) 54.0 g conc. HNO3
Difficulty Level:
Find the molality of 15% (w/vol.) solution of H2SO4 of density 1.1g/cm3 :
1. 1.2
2. 1.4
3. 1.8
4. 1.6
Difficulty Level:
Which mode of expressing concentration is independent of temperature?
(1) Molality
(2) Percent by mass
(3) Mole fraction
(4) All of these
Difficulty Level:
The molality of 1M solution of NaCl ( specific gravity 1.0585 g/mL ) is:
(1) 1.0585
(2) 1.0
(3) 0.10
(4) 0.0585
Difficulty Level:
The total molarity of all the ions containing 0.1 M of CuSO4 and o.1M of Al2(SO4)3 is:
(1) 0.2M
(2) 0.7M
(3) 0.8M
(4) 1.2M
Difficulty Level: