例题:在25℃时,pH值等于12的强碱溶液稀释到原来的100倍,pH 等于多少?
解:
稀释前:[OH-] =
pH=-lg[H+]
稀释后:[OH-] =
[H+] =
=10
=1 ×10-2mol/L
=1 ×10-4mol/L
=1 ×10-10mol/L
②碱的稀释