Q.
Number of moles of ions produced in 8 litres of 0.1M of Potash alum are
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a
0.8
b
3.2
c
6.4
d
1.6
answer is C.
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Detailed Solution
K2SO4.Al2SO43.24H2O....Potash Alum ; K2SO4.Al2SO43.24H2O1mole⇌2K+2 moles+2Al3+2 moles+4SO42-4 moles+24H2O ; 1 mole ion or 1 gram ion=NA ions=6.023×1023 ions ; Total ions/mole=8NA ; K+ions/mole=2NA; Al3+ions/mole=2NA; SO42-ions/mole=4NA; 0.1M=n×18; n=0.8 moles ; 0.8 moles of salt=6.4NAions...6.4 moles of ions ; =3.2NA SO42-ions....3.2 moles of ions ; =1.6NA K+ions....1.6 moles of ions ; =1.6NA Al3+ions ....1.6 moles of ions ;
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