Question

5%浓度的NaOH溶液,PH值是多大啊

Answer 1

1000g 5%浓度的NaOH溶液,体积约为1L

其中,氢氧化钠物质的量的浓度为:

1000*5%/40=1.25MOL/L

[OH-]:1.25MOL/L

PH

=-lg[H+]

=-lg1*10^-14/[OH-]

=14+lg[OH-]

=14+lg1.25

=14+0.1

=14.1