Find pH of solution prepared by mixing 100 ml. 0.1 M Na_3PO_4 and 200 ml , 0. 1M HCl ( P^(kal) , P^(ka2 )& P^(ka 3)" of " H_3PO_4 " are "3,7 & 1 0 respectively)

Find pH of solution prepared by mixing 100 ml. 0.1 M Na_3PO_4 and 200

1.	Find pH of solution prepared by mixing 100 ml. 0.1 M Na_3PO_4 and 200 ml , 0. 1M HCl ( P^(kal) , P^(ka2 )& P^(ka 3)" of " H_3PO_4 " are "3,7 & 1 0 respectively)
Answer» SOLUTION :`{:(Na_3PO_4 +, HCl to, Na_2HPO_4+ NaCl),( 10 m " mole " , 20 m " mole ",) ,( , 10 m " mole " , ) , ( , 10 m " mole " , ) :}` `{:( HPO_4^(_2) +, H^(+) to, H_2PO_4^(-) ),( 10 , 10 , 0),( -,-, 10 m " MOLES" ) :}` `pH =(P^(K_a_1)+P^(Ka_2) )/( 2) = 5`