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Chemistry Class - 11: Chapter β 1. Some Basic Concepts of Chemistry β Part-5
Question-32:
The density of 3 molar solution of is 1.110 g mL β 1. Calculate the molarity of the solution
Answer:
molal solution of means that of are dissolved in of solvent.
β΄ Mass of
(Since density of solution = 1.110g mL β 1)
Since solution contains of
Question-33:
Volume of a solution changes with change in temperature, then, will the molality of the solution be affected by temperature? Give reason for your answer.
Answer:
No, Molality of solution does not change with temperature since mass remains unaffected with temperature.
Question-34:
If of dissolves in of , calculate the mole fraction of each component in the solution. Also, determine the molarity of solution (specific gravity of solution is .
Answer:
Number of moles of
Mass of solution
Volume of solution
Question-35:
The reactant which is entirely consumed in reaction is known as limiting reagent. In the reaction , when moles of A react with moles of B, then
(i) Which is the limiting reagent?
(ii) Calculate the amount of C formed?
Answer:
According to the above equation, mols of βAβ require mols of βBβ for the reaction.
Hence, for
But we have only of βBβ , hence, βBβ is the limiting reagent. So amount of βCβ formed is determined by amount of βBβ .
Since of βBβ give mols of βCβ . Hence 6 mols of βBβ will give