Tính độ tan của các chất rắn AgCI, AgBr, AgI, AgSCN, Ag2Cr04, Fe(OH)3, HgS biết tích số tan

TAgC = 1,8.10-10, TAgBr = 5,2.10-13, TAgi = 8,3.10-16, TAgSCN = 1,1.10-12, TA82CT04 = 2.10-12, Tre(OH)3 =

4.10-38, THgS = 4.10-33.

$AgCl\leftrightharpoons Ag^{+}+Cl^-$

$s \rightarrow s \rightarrow s$

$\rightarrow [Ag^+].[Cl^-]=s.s=s^2=1,8.10^{-10}
\rightarrow s=1,34.10^{-5}M$

AgBr

$T_{AgBr}=[Ag^+].[Br^-]=s^2=5,2.10^{-13}
\rightarrow s=7,21.10^{-7}M$

$T_{AgI}=s^2=8,3.10^{-16}\rightarrow s=2,88.10^{-8}M$
$T_{AgSCN}=s^2=1,1.10^{-12}\rightarrow s=1,05.10^{-6}M$

$T_{Ag_2CrO_4}=(2s)^{2}.s=4s^3=2.10^{-12}$
$\rightarrow s=7,94.10^{-5}M$

$T_{Fe(OH)_3}=s.(3s)^3=27s^4=4.10^{-38}\rightarrow s=1,96.10^{-10}M$

$T_{HgS}=s^2=4.10^{-33} \rightarrow s=6,33.10^{-17}M$