`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

H_(3)PO_(4) is a tribasic acid with pK_(a_(1)), pK_(a_(2)) and pK_(a_(3)) 1.12, 7.21 , and 12.32 , respectively. 10^(-3)M H_(3)PO_(4)(pH = 7) is used in fertilizers as an aqueous soil digesting. Plants can absorb zinc in water soluble from only. Zinc phosphate is the source of zinc and PO_(4)^(3- ) ions in the soil. K_(sp) of zinc phosphate = 9.1 xx 10^(-33) . [PO_(4)^(3-)] ion in the soil with pH = 7 , is

H_(3)PO_(4) is a tribasic acid with pK_(a_(1)), pK_(a_(2)) and pK_(a_(3)) 1.12, 7.21 , and 12.32 , respectively. 10^(-3)M 'H_(3)PO_(4)'(pH = 7) . Ksp of Zinc phosphate= 9.1 xx 10^(-33) . [Zn^(2+)] ion in the soil is

pK_(b) of aq. NH_(3) is 4.74 hence pH of 0.01 M NH_(3) solution is

A buffer solution of 0.080M Na_(2)HPO_(4) and 0.020 M Na_(3)PO_(4) is prepared. The electrolytic oxidation of 1.0 mmol RNHOH is carried out in 100mL buffer to give RNHOH + H_(2)O rarr RNO_(2) + 4H^(o+) + 4e^(-) Calculate approximate pH of the solution after oxidation is complete pK_(a_(2)), pK_(a_(2)) , and pK_(a_(3)) of H_(3)PO_(4) are 2.12,7.20 , and 12.0 , respectively.

H_(3)PO_(4) is a tribasic acid with pK_(a_(1)), pK_(a_(2)) and pK_(a_(3)) 1.12, 7.21 , and 12.32 , respectively. It is used in fertiliser productions and its various salts are used in food, detrgent, toothpaste, and in metal treatment. Small quantities of H_(3)PO_(4) are used in inparting the sour or tart taste of soft drinkes, such as Coca Cola, and beers, in which H_(3)PO_(4) is prese4nt 0.05% by weight (density = 1.0 gmL^(-1)) . 10^(-3)M H_(3)PO_(4)(pH = 7) is used in fertilisers as an aqueous soil digesting. Plants can absorb zinc in whater soluble from only. Zinc phosphate is the source of zinc and PO_(4)^(3- ) ions in the soil. K_(sp) of zinc phosphate = 9.1 xx 10^(-33) . [Zn^(2+)] ion in the soil is