Question 11 Mark
Define ‘mole fraction’ of a substance in a solution.
Answer
View full question & answer→Mole fraction is defined as the number of moles of a component divided by total number of moles of all the components present in the solution.
50 questions · timed · auto-graded
$\text{i}=\frac{\text{Number of moles of particels after association}}{\text{Number of moles of particles before association}}=\frac{1}{2}$
Obey Raoult’s Law.
$\Delta_\text{mix}\text{H}=0,\ \Delta_\text{mix}\text{V}=0.$
Explanation:
Assertion is correct statement but reason is a wrong statement because a semipermeable membrane permits solvent molecules to pass through a solution of lower concentration to that of higher concentration Flow of solvent molecule from solvent side to solution side through semipermeable membrane is called osmosis.
The mass percentage of a component of a solution is defined as the mass of the solute in grams present in 100 g of the solution.
It is expressed as:
$\text{Mass % of a component}=\frac{\text{Mass of component in solution}}{\text{Total mass of solution}}\times100$
$\text{NH}_4\text{Cl}(\text{aq})\rightarrow\text{NH}^+_4+\text{Cl}^-(\text{aq})$
The ions that were held together in crystalline solid are free and moving in all possible directions. Its entropy has increased and this makes $\text{T}\Delta\text{S}>\Delta\text{H},\ \text{i.e., }\Delta\text{G}=-\text{ve}.$Molarity (M) is defined as the number of moles of the solute dissolved in one Litre of the solution.
It is expressed as:
$\text{Molarity (M)}=\frac{\text{Moles of solute}}{\text{Volume of solvent in Litre}}$
Explanation:
1M glucose solution has the highest freezing point because it has lowes $\Delta\text{T}_\text{f}(\text{T}_\text{f}=\text{T}_\text{f}^0+\Delta\text{T}_\text{f}).$
Explanation:
Molarity changes with temperature because volume changes with temperature.
Explanation:
When a non-volatile solute is added to water, freezing point lowers due to lowering of vapour pressure.