`H_(3)PO_(4)` is a weak triprotic acid, approximate pH 0.1 M `NaHPO_(4)`(aq.) is calculated by:

H_(3)PO_(4) is a weak triprotic acid, approximate pH 0.1 M Na_2HPO_(4) (aq.) is calculated by:

H_3PO_4 is triprotic acid. Explain.

pK_(a1) , pK_(a_(2)) and pK_(a_(3)) of H_(3)PO_(4) are respectively x,y and z. pH of 0.1 M Na_(2)HPO_(4) solution is

Statement-1: Heat of neutralisation of H_(3)PO_(4) with NaOH is more than that of HCl with NaOH. Statement-2: H_(3)PO_(4) is a triprotic acid and hence release more heat on complete neutralization, while HCl is a monoprotic acid.

The solution of weak monoprotic acid which is 0.01 M has pH= 3. Calculate K_a of weak acid

H_3A is a weak triprotic acid (K_(a_1) =10^(-5) ,K_(a_2) =10^(-13) ) . What is the value of pX of 0.1 M H_3 A(aq.) solution ? Where pX =- log X and X = ([A^(3-)])/([HA^(2-)])

STATEMENT -1 : H_(3)PO_(4) is a tribasic acid. and STATEMENT -2 : In H_(3)PO_(4) , only two H-atoms are replaceable.