Assuming complete ionization, which will have maximum pH?
0.01M(NH4)2SO4
0.01MNH4Cl
0.01M(NH4)3PO4
Equal
A
0.01M(NH4)2SO4
B
0.01MNH4Cl
C
Equal
D
0.01M(NH4)3PO4
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Solution
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NH4Cl is salt of NH4OH and HCl so it dissociates to give only one H+ ion.
(NH4)2SO4 is salt of NH4OH and H2SO4 so it dissociates to give only two H+ ions.
(NH4)3PO4 is salt of NH4OH and H3PO4Cl so it dissociates to give only three H+ ion. So it has maximum pH.
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