Chemistry Class-11: Chapter –7. Equilibrium Part – 7

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Question: 35

Calculate the volume of water required to dissolve lead (II) chloride to get a saturated solution. .

Answer:

Molar mass of

∴ Solubility of PbCl2 in g L–1 = 2 × 10–3 × 278 g L–1

= 556 × 10–3 g L–1

= 0.556 g L–1

To get saturated solution, of is dissolved in water.

is dissolved in water.

To make a saturated solution, dissolution of water will be required.

Question: 36

A reaction between ammonia and boron trifluoride is given below:

Identify the acid and base in this reaction. Which theory explains it? What is the hybridisation of B and N in the reactants?

Answer:

Question: 37

Following data is given for the reaction:

Predict the effect of temperature on the equilibrium constant of the above reaction.

Answer:

The reaction is endothermic. Hence, according to Le-Chatelier’s principle, reaction will proceed in forward direction on increasing temperature.