Question:
1.06 g of Na$_2$CO$_3$ (molar mass = 106 g mol$^{-1}$) is dissolved in 500 g water. What is its molality?
1.06 g of Na$_2$CO$_3$ (molar mass = 106 g mol$^{-1}$) is dissolved in 500 g water. What is its molality?
Show Hint
Always convert solvent mass to kg when calculating molality.
Updated On: May 12, 2025
- 0.2 m
- 0.02 m
- 2 m
- 0.04 m
Hide Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Molality $(m) = \dfrac{\text{moles of solute}}{\text{mass of solvent in kg}}$
Moles of Na$_2$CO$_3$ = $\dfrac{1.06}{106} = 0.01$ mol
Mass of water = 500 g = 0.5 kg
$m = \dfrac{0.01}{0.5} = 0.02$ mol/kg
Moles of Na$_2$CO$_3$ = $\dfrac{1.06}{106} = 0.01$ mol
Mass of water = 500 g = 0.5 kg
$m = \dfrac{0.01}{0.5} = 0.02$ mol/kg
Was this answer helpful?
0
0
Top Questions on Solutions
- 10 mL of 2 M NaOH solution is added to 20 mL of 1 M HCl solution kept in a beaker. Now, 10 mL of this mixture is poured into a volumetric flask of 100 mL containing 2 moles of HCl and made the volume upto the mark with distilled water. The solution in this flask is :
- If equal volumes of AB and XY (both are salts) aqueous solutions are mixed, which of the following combination will give precipitate of AY, at 300 K?
- 20 mL of 2 M NaOH solution is added to 400 mL of 0.5 M NaOH solution. The final concentration of the solution is \(\_\_\_\_\_\) x \(10^{-2}\)M. (Nearest integer)
- Shweta mixed two liquids A and B of 10 mL each. After mixing, the volume of the solution was found to be 20.2 mL.
(i) Why was there a volume change after mixing the liquids?
(ii) Will there be an increase or decrease of temperature after mixing?
(iii) Give one example for this type of solution. - Give reasons:
(a) Cooking is faster in a pressure cooker than in an open pan.
(b) On mixing liquid X and liquid Y, volume of the resulting solution decreases. What type of deviation from Raoult's law is shown by the resulting solution? What change in temperature would you observe after mixing liquids X and Y?
View More Questions
Questions Asked in AP EAPCET exam
- If $$ \int \frac{dx}{1 - \sin^4 x} = A \tan x + B \tan^{-1}(\sqrt{2} \tan x) + C, $$ then find $ A^2 - B^2 $.
- AP EAPCET - 2025
- Integration
- In compound (X), hyperconjugation is present and in (Y), resonance effect is present. What are X and Y, respectively?
- AP EAPCET - 2025
- Organic Chemistry
- A family consists of 8 persons. If 4 persons are chosen at random and they are found to be 2 men and 2 women, then the probability that there are equal numbers of men and women in that family is:
- AP EAPCET - 2025
- Probability
- The total maximum number of electrons possible in 3d, 6d, 5s and 4f orbitals with \(m_l\) (magnetic quantum number) value -2 is
- AP EAPCET - 2025
- Atomic Structure
- If \[ A = \begin{bmatrix} 1 & -1 & 2 \\ -2 & 3 & -3 \\ 4 & -4 & 5 \end{bmatrix} \] and \( A^T \) represents the transpose of \( A \), then calculate \( AA^T - A - A^T \).
- AP EAPCET - 2025
- Matrices
View More Questions