Advertisements
Advertisements
Question
Why is molality of a solution independent of temperature?
Advertisements
Solution
Molality:
Molality is amount of solute per mass of solvent. So, the concentration of solvent is expressed in terms of mass, and the mass of a substance is not affected by the change in temperature. Hence, molality is independent of temperature.
APPEARS IN
RELATED QUESTIONS
Calculate the mole fraction of benzene in solution containing 30% by mass in carbon tetrachloride.
Calculate the mass of urea (NH2CONH2) required in making 2.5 kg of 0.25 molal aqueous solution.
Calculate (a) molality (b) molarity and (c) mole fraction of KI if the density of 20% (mass/mass) aqueous KI is 1.202 g mL−1.
Define molarity (M).
If the solubility product of CuS is 6 × 10−16, calculate the maximum molarity of CuS in aqueous solution.
Calculate the mass percentage of aspirin (C9H8O4) in acetonitrile (CH3CN) when 6.5 g of C9H8O4 is dissolved in 450 g of CH3CN.
Define molality.
Define Normality.
When a solute is present in trace quantities the following expression is used:
1 M, 2.5 litre NaOH solution is mixed with another 0.5 M, 3 litre NaOH solution. Then find out the molarity of the resultant solution:
4.0 g of NaOH is dissolved in 100 ml solution. The normality of the solution is ____________.
200 ml of water is added to 500 ml of 0.2 M solution. What is the molarity of this diluted solution?
If N/10 50 ml H2SO4, N/3 30 ml HNO3, N/2 10 ml HCl is mixed and solution is made to 1 L. Then normality of the resultant solution is:
Which of the following units is useful in relating concentration of solution with its vapour pressure?
Which of the following concentration unit is independent of temperature?
Define the following modes of expressing the concentration of a solution. Which of these modes are independent of temperature and why?
w/w (mass percentage)
Define the following modes of expressing the concentration of a solution. Which of these modes are independent of temperature and why?
V/V (volume percentage)
Define the following modes of expressing the concentration of a solution. Which of these modes are independent of temperature and why?
ppm. (parts per million)
The concentration of water molecules in pure water at 298 K is?
What is the ratio of mass of an electron to the mass of a proton?
The number of electrons involved in the reduction of one nitrate ion to hydrazine is
What is molarity of resulting solution obtained by mixing 8.5 L of 0.5 m urea solution and 500 ml of 2 m urea solution?
3.36 M sulphuric acid solution is 29% H2SO4 calculate the density of the solution.
Calculate the mass percent of benzene (CoH6) and carbon tetrachloride (ccl4) if 22 g of benzene is dissolved in 122 g of carbon tetrachloride.
A 6.50 molal solution of KOH (aq.) has a density of 1.89 g cm−3. The molarity of the solution is ______ mol dm−3. (Round off to the Nearest Integer)
[Atomic masses: K: 39.0 u; O: 16.0 u; H: 1.0 u]
A given solution of H2O2 is 30 volumes. Its concentration in terms of molarity is ______.
The molarity of the solution prepared by dissolving 6.3 g of oxalic acid (H2C2O4 · 2 H2O) in 250 mL of water in mol L-1 is x × 10-2. The value of x is ______. (Nearest integer)
[Atomic mass: H : 1.0, C : 12.0, O : 16.0]
A 5% solution of \[\ce{Na2SO4.10H2O}\] (MW = 3 22) is isotonic with 2% solution of non- electrolytic, non volatile substance X. Find out the molecular weight of X.
