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Equilibrium Test - 8

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Equilibrium Test - 8
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  • Question 1
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    What is the best description of the change that occurs when Na2O(s) is dissolved in water?

    Solution

    In water Na2O dissociates as -
    Na2O + H2O → 2Na+ + O2-
    The oxide ion formed can form hydrgen bonds with water and is stabilised. Thus it is easy for Na2O and all other oxides to dissolve in water as it brings about further stability in the system.

  • Question 2
    1 / -0

    Conjugate acid of a weak base is always stronger. What will be the decreasing order of basic strength of the following conjugate bases? OH-, RO-, CH3COO-, Cl-

    Solution

    conjugate acids of given bases are H2O, ROH, CH3COO-, Cl-
    their acidic strength in the order
    Cl- > CH3COO- > H2O > ROH
    basic strength in the order RO− > OH− > CH3COO− > Cl−

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