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A solution is 0.1M with respect to Ag+, Ca2+, Mg2+ and Al3+ which will precipitate at lowest concentration of [PO4^3-] when solution of Na3PO4 is added? 1) Ag3Ag3PO4(Ksp=1*10^-6), 2) Ca3(PO4)2(Ksp=1*10^-33), 3) Mg3(PO4)2(Ksp=1*10^-24), 4) AlPO4(Ksp=1*10^-20)
Asked by patra04011965 | 01 Jan, 2019, 10:39: PM
answered-by-expert Expert Answer
Ans: option (4)
 
Foe AlPO4,
Ksp = [Al3+] [PO4-3 ]
 
Ksp = [0.1] [PO4-3 ]
 
[Al3+] [PO4-3 ] = fraction numerator 10 to the power of negative 20 end exponent over denominator 0.1 end fraction space space equals space 10 to the power of negative 19 end exponent space straight M
Answered by Ramandeep | 07 Jan, 2019, 01:08: PM
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