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The equivalent weight of potash alum (...

The equivalent weight of potash alum
`(K_(2)SO_(4).Al_(2)(SO_(4))_(3).24H_(2)O)` is

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(a) Equivalent weight of `CaCO_(3) = ("mol. Wt.")/("Total charge on +ve ion")= (100)/(2)= 50`
(b) Equivalent weight of `K_(2)SO_(4). Al_(2)(SO_(4))_(3). 24H_(2)O = ("mol. Wt.")/(8)`
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Given the ionic equivalent conductivities for the following ions : lambda^(@)._(eq)K^(o+)=73.5cm^(2)ohm^(-1)eq^(-1) lambda^(@)._(eq)Al^(3+)=149cm^(2)ohm^(-1)eq^(-1) lambda^(@)._(eq)SO_(4)^(2-)=85.8cm^(2)ohm^(-1)eq^(-1) The wedge_(eq)^(@) for potash alum (K_(2)SO_(4).Al_(2)(SO_(4))_(3).24H_(2)O) is :

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The weight (in gram )of pure potash Alum ( K_(2)SO_(4).Al_(2)(SO_(4) )_(3).24H_(2)O ) which contains 0.64kg oxygen is . (Atomic weight of K = 39 , S = 32 ,Al = 27 )

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