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Earn 100

(a) For which of the following, water would behave as a levelling solvent and for which, it would behave as a differentiating solvent? Strong acids, weak acids, strong bases, weak bases.
(b) For which of the following, glacial acetic acid would behave as a levelling solvent and for which, it would behave as a differentiating solvent? Strong acids, weak acids, strong bases, weak bases.
(c) For which of the following, liquid ammonia would behave as a levelling solvent and for which, it would behave as a differentiating solvent? Strong acids, weak acids, strong bases, weak bases.

Important Questions on Equilibrium

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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-2>Q 147
Calculate pOH,CH3NH3+,C4H13N2+&C4H14N22+ in an aqueous solution consisting of 0.2 M methyl amine Kb=4.1×10-4 and 0.1 M butane-1, 4 -diaine Kb1=6.2×10-4M; Kb2=2.25×10-5.
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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-2>Q 148
Upon adding 50 mL of 0.2 M KOH solution to 50 mL of 0.5 M solution of ethylene diamine Kb1=8×10-5; Kb2=2.7×10-8, calculate pH of final solution
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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-2>Q 149
Determine the pH of 0.5 M BH2Cl2 solution (salt of a diacidic base B). Also calculate BH+&[B]. Given Kb1& Kb2 for B are 10-6& 2×10-10.
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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-2>Q 150
Prove that buffer capacity of 0.2 M CH3COOH-0.2 M CH3COONa buffer is less than the 0.4 M CH3COOH-0.4MCH3COONa.
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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-2>Q 151
A small quantity of phenolphthalein (an acid indicator) is added to a decimolar solution of sodium butyrate. Calculate the ratio of the coloured to the colourless form of the indicator. Ka for butyric acid 1.5×10-5,K for the indicator =3.075×10-10 and Kw=10-14. Take log1.23=0.09.
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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-2>Q 152
At pH=2, half of the indicator, thymol blue (an acid type indicator) is in unionised form. Find the percentage of indicator in unionised form in the solution with H+=4×10-3 M.
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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-2>Q 153
A base type indicator B differs in colour from its conjugate acid (BH'). The acidic form is red in colour while the basic form is blue. The human eye can sense blue colour distinctly when the ratio of blue form concentration to red form concentration is ab or more. However, the human eye can distinctly sense the red colour when the ratio of red form concentration to blue form concentration. is cd or more. Determine the pH range of solution in which human eyes cannot observe distinct red or blue colours. Take B as Keq.
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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-2>Q 154
Determine the maximum number of moles of MgF2 that can dissolve in 1000 L of a buffer solution of pH=4. Given: Ksp of MgF2=914×10-8 and Ka of HF=3.5×10-4. Take (2.17)3=10.