Question

1.将10mL PH=5的盐酸稀释到100mL,10000mL后溶液的PH值?

Answer 1

1,6 接近7

2, pH=-lg[0.1*0.2*2/10]=2.4

3,pH=-lg(2*10^-2+1*10^-4)/3=2.2

4,pH(0.04*0.4*2-0.06*0.5)/0.1=1.7