(3) A

10.00-mL

sample of

0.1000MKH_(2)PO_(4)

was titrated with

0.1000MHCl

\

K_(a)

for phosphoric acid

(H_(3)PO_(4)):K_(a1)=7.50\\\\times 10^(-3);K_(a2)=6.20\\\\times 10^(-8);K_(a3)=4.20\\\\times 10^(-10)

\ Calculate the

pH

after addition of

10.00mL

of

HCl

to the

KH_(2)PO_(4)

solution?

(3) A 10.00mL sample of 0.1000MKH2PO4 was titrated with 0.1000MHCl Ka for phosphoric acid (H3PO4):Ka1=7.50103;Ka2=6.20108;Ka3=4.201010 Calculate the pH after addition of 10.00mL of HCl to the KH2PO4 solution