一条无机化学题
在0.1mol/L Na3PO4溶液中,[PO4 3-] 和pH多大?
PO4 3-的碱常数为4.54*10^-2
人气：204 ℃ 时间：2020-03-27 11:22:08
解答
c（OH)=（4.54*10^-2 * 0.1）^ 1/2 =0.067
PH=12.83
ka3 = 10^-14 / 4.54*10^-2 = 2.2*10^-13
[PO4 3-] = 0.1*[c(ka3)/ c(H+) + ka3 ]= 0.060 mol/l
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