Reactions in Solutions

IMPORTANT

Reactions in Solutions: Overview

The topic describes different ways of expressing the concentration of a solution. It explains the concepts of mass per cent, mole fraction, molarity and molality with solved problems.

Important Questions on Reactions in Solutions

EASY
IMPORTANT

Residue is a substance that dissolves a solute to form a solution.

EASY
IMPORTANT

A substance that dissolves a solute to form a solution is called as:

EASY
IMPORTANT

_____ is a substance that dissolves a solute to form a solution.

MEDIUM
IMPORTANT

Amount of Oxalic acid COOH2.2H2O, in grams required to prepare 200 mL of 0.5  M oxalic acid solution is _____.

MEDIUM
IMPORTANT

Amount of Oxalic acid COOH2.2H2O, in grams required to prepare 200 mL of 0.5  M oxalic acid solution is _____.

EASY
IMPORTANT

In a salt water solution, salt is considered the solute

EASY
IMPORTANT

What is the substance called that dissolves the other substance in a solution?

MEDIUM
IMPORTANT

Amount of Oxalic acid COOH2.2H2O, in grams required to prepare 200 mL of 0.5  M oxalic acid solution is _____ g.(12.6/1.26)

HARD
IMPORTANT

How many moles of solute particles are present in one litre of 10-4 M potassium sulphate? (assume K2SO4 does not dissociate.)

0.0001 / 0.001 / 0.01

MEDIUM
IMPORTANT

Which of the following solutions have the same concentration?

MEDIUM
IMPORTANT

Calculate the molarity of a solution of ethanol in water, in which the mole fraction of ethanol is 0.040.
(Assume the density of water to be one).
(Provide correct answer upto 2 decimal places and no need to mention units.)

HARD
IMPORTANT

A quantity of 720 g water is added in 230 g of ethanol at a certain temperature to get a solution of density 950 kg m-3. Which of the following is/are correct regarding the solution formed?

EASY
IMPORTANT

3 g of salt of molecular mass 30 is dissolved in 250 mL of water. The molarity of the solution is _____mol/L0.4/0.04/0.1

EASY
IMPORTANT

3 g of a salt of molecular mass is 30. 250 ml is dissolved in 250 ml of water. The molarity of the solution is _____.

EASY
IMPORTANT

100 ppm (w/w) of He (by mass) is present in an Ar sample at 0oC , in a rigid 22.4 L vessel. Which of the following units remain unchanged as the temperature is raised to 100oC?

EASY
IMPORTANT

8g NaOH present in 18g of water. Determine mole fraction of NaOH and molality

EASY
IMPORTANT

The weight of Na+ in the solution of Na2SO4 is 92g . Find molality of Na+ per kg of water?

EASY
IMPORTANT

8.50 gram of NH3 is present in 250 mL volume. Its active mass is

MEDIUM
IMPORTANT

A sample of NaOH weighing 0.38 g is dissolved in water and the solution is made to 50.0 mL in a volumetric flask. What is the molarity of the resulting solution?