Question

1 14 What is the ttion concentration in a ho 14.0810-4 bangium Hidroxide solution (a) 4.0810-4 () 1.3 X 10M o none. (6)2.5X10" a)3.4810-4M

Answer 1

Answer is option C)1.3×10-11M

Ba(OH)2$\rightarrow$Ba+2OH-

[Ba(OH)2]=4.0×10-4M

There are two OH-

So [OH]=2×4.0×10-4M=8.0×10-4M

We know that [H+][OH-]=Kw=1.0×10-14

[H+]=Kw/[OH]=(1.0×10-14)/(8.0×10-4)

=1.3×10-11M