Question
Explain with examples the terms necessary to determine the pH of weak electrolyte solution.

Answer

SELF

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Reaction between $N _2$ and $O _2$ - takes place as follows:
$
2 N_2(g)+O_3(g) \rightleftharpoons 2 N_2 O(g)
$
If a mixture of 0.482 mol of $N _2$ and 0.933 mol of $O _2$ is placed in a 10 L reaction vessel and allowed to form $N _2 O$ at a temperature for which $K_c=2.0 \times 10^{-37}$ determines the composition of the equilibrium mixture.
The lattice enthalpy of an ionic compound is the enthalpy when one mole of an ionic compound present in its gaseous state, dissociates into its ions. It is impossible to determine it directly by experiment. Suggest and explain an indirect method to measure lattice enthalpy of NaCl(s).
Calculate the equilibrium constant for the following equilibrium system at 1120K.

$\text{C}(\text{s})+\text{CO}_2(\text{g})+2\text{Cl}_2\stackrel{\text{K}_\text{p}}{\rightleftharpoons}2\text{COCl}_2(\text{g})$

Given the following equations and equilibrium constants:

$\text{CO}(\text{s})+\text{Cl}_2(\text{g})\rightleftharpoons\text{COCl}_2(\text{g})$

$\text{Kp}_1 = 6.0 \times 10-3 \dots(1)$

$\text{CO}(\text{s})+\text{Cl}_2(\text{g})\rightleftharpoons\text{CO}_2(\text{g})$

$\text{Kp}_2 = 1.3 \times 1014 \dots(2)$

What is hybridization? Describe sp³, sp² and sp hybridization with examples.
4 In the alkane H3C-CH2-C(CH3 )2-CH2-CH(CH3)2 , identify 1°,2°,3° carbon atoms and give the number of H atoms bonded to each one of these.
Explain the Liebig's combustion process for analysis of carbon and hydrogen.
  1. What are two conditions for the formation of hydrogen bond?
  2. In which of the following compounds 'S' does not obey octet rule?

$\text{SF}_2,\text{SF}_4,\text{SF}_6,\text{SO}_2$

  1. Explain the term hybridisation taking $\text{CH}\equiv\text{CH}$ as an example.
Give a brief description of the principles of the following techniques taking an example in each case.
Chromatography.
The solubility product constant of Ag2CrO4 and AgBr are 1.1 × 10–12 and 5.0 × 10–13 respectively. Calculate the ratio of the molarities of their saturated solutions.
At 1127 K and 1 atmosphere pressure, a gaseous mixture of CO and $CO _2$ in equilibrium with solid carbon has 90.55\% CO by mass.
$
C(s)+CO_2(g) \rightleftharpoons 2 CO(g)
$
Calculate $K _{ c }$ for the reaction at the above temperature.