I. | \[SrC{{l}_{2}}\cdot 6{{H}_{2}}O(s)\rightleftharpoons SrC{{l}_{2}}\cdot 2{{H}_{2}}O(s)+4{{H}_{2}}O(g)\] | |
\[{{K}_{p}}={{10}^{-12}}at{{m}^{4}}\] | ||
II. | \[N{{a}_{2}}HP{{O}_{4}}\cdot 12{{H}_{2}}O(s)\rightleftharpoons N{{a}_{2}}HP{{O}_{4}}\cdot 7{{H}_{2}}O(s)+5{{H}_{2}}O(g)\] | |
\[{{K}_{p}}=5.25\times {{10}^{-13}}at{{m}^{5}}\] | ||
III. | \[N{{a}_{2}}S{{O}_{4}}\cdot 10{{H}_{2}}O(s)\rightleftharpoons N{{a}_{2}}S{{O}_{4}}(s)+10{{H}_{2}}O(g)\] | |
\[{{K}_{p}}=4.08\times {{10}^{-25}}at{{m}^{10}}\] |
A) \[SrC{{l}_{2}}.2{{H}_{2}}O\]
B) \[N{{a}_{2}}HP{{O}_{4}}.7{{H}_{2}}O\]
C) \[N{{a}_{2}}S{{O}_{4}}\]
D) All of these
Correct Answer: A
Solution :
[a] \[{{K}_{p}}=P{{({{H}_{2}}O)}^{4}}={{10}^{-12}},\,\,P({{H}_{2}}O)={{10}^{-3}}\]atm. Therefore \[SrC{{l}_{2}}.2{{H}_{2}}O\] (dehydrated salt) is the most effective drying agent, since it has the lowest vapour pressure of water in equilibrium with it amongst others.You need to login to perform this action.
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