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Standard XII
Physics
2nd Law of Thermodynamics
Temperature d...
Question
Temperature dependent is______? 1)Molarity; 2)molality; 3)normality
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Q.
Assertion :Molarity of a solution does not depend upon temperature whereas molality depends. Reason: Molarity and molality both depend only on the number of moles of solute particles.
Q.
Concentration terms like mass percentage, ppm, mole fraction and molality do not depend on temperature. However, molarity is a function of temperature because:
Q.
Assertion :One molar aqueous solution is more concentrated than that of
1
molal aqueous solution. Reason: Molarity is a function of temperature as volume depends on temperature
Q.
Differentiate between molarity and molality for a solution. How does a change in temperature influence their values?
Q.
(a) A
10
%
solution (by mass) of sucrose in water has a freezing point of 269.15 K. Calculate the freezing point of
10
%
glucose in water if the freezing point of pure water is 273.15 K.
given:
(Molar mass of sucrose = 342 g
m
o
l
−
1
)
(Molar mass of glucose = 180 g
m
o
l
−
1
)
(b) Define the following terms:
(i) Molality (m)
(ii) Abnormal molar mass.
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