MolSynapse
question bank
All chapters
NEET
JEE
Practice
MolSynapse
/
Question bank
/
Mole Concept
/
Concentration terms (molarity, molality, mole fraction, ppm) and dilution
JEE Main level
Single correct option
Difficulty 2 of 3
mc081
A
2.00
M
aqueous solution of
NaCl
(
58.5
g/mol
) has density
1.08
g/mL
. Its molality is closest to
A
2.00
m
B
2.08
m
C
1.85
m
D
1.96
m
Answer: B
1 L of solution weighs 1080 g and contains 2 x 58.5 = 117 g of
NaCl
, so water = 963 g. Molality = 2.00/0.963 = 2.08 mol/kg.
Practice Mole Concept
More on Concentration terms (molarity, molality, mole fraction, ppm) and dilution
Previous question
Next question
More questions on Concentration terms (molarity, molality, mole fraction, ppm) and dilution
18 g of glucose (180 g/mol) is dissolved in 250 g of water. The molality of the solution is
JEE Main level
Concentrated sulfuric acid is 98% H2SO4 by mass with density 1.84 g/mL. Taking H2SO4=98 g/mol, its molarity is
JEE Main level
200 mL of 0.50 M HCl is mixed with 300 mL of 1.0 M HCl (volumes additive). The molarity of the mixture is
JEE Main level
100 mL of 0.20 M Al2(SO4)3 is mixed with 150 mL of 0.10 M Na2SO4 (volumes additive, no reaction). Find the molarity of SO4^2- in the mixture...
JEE Main level
6.0 mL of 0.40 M CuSO4 solution is diluted with water to 2.0 L (take the density of the dilute solution as 1.00 g/mL). Taking Cu=63.5, find ...
JEE Main level
Which of the following aqueous solutions has a molarity of 0.50 M? (Molar masses in g/mol: NaOH 40, H2SO4 98, Na2CO3 106, NaCl 58.5.)
JEE Main level