Home
Class 12
CHEMISTRY
Phosphoric acid (H(3)PO(4)) have three i...

Phosphoric acid `(H_(3)PO_(4))` have three ionization constants `K_(a_(1)),K_(a_(2))` and `K_(a_(3))`. Among these ionization constants which has a lower value ? Give reason for it.

Text Solution

Verified by Experts

`K_(a_(3))` has lower value. This is because it becomes more difficult to remove a positively charged proton from a negative ion `(HPO_(4)^(2-))` due to strong electrostatic attraction.
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL EQUILIBRIUM AND ACIDS-BASES

    VGS PUBLICATION-BRILLIANT|Exercise SHORT ANSWER QUESTIONS|66 Videos

  • CHEMICAL EQUILIBRIUM AND ACIDS-BASES

    VGS PUBLICATION-BRILLIANT|Exercise LONG ANSWER QUESTIONS|16 Videos

  • CHEMICAL BONDING AND MOLECULAR STRUCTURE

    VGS PUBLICATION-BRILLIANT|Exercise LONG ANSWER QUESTIONS|9 Videos

  • CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

    VGS PUBLICATION-BRILLIANT|Exercise Long Answer Questions|24 Videos

Similar Questions

Explore conceptually related problems

Why is K_(a_(2)) lt lt K_(a_(1)) for H_(2)SO_(4) in water ?

Write equations to show the step wise ionization of the polyprotic acids H_(2)SO_(4) and H_(3)PO_(4) .

If 20% of three element subsets of the set {a_(1),a_(2),a_(3),.......,a_(n)} are three element subsets with an element a_(1) , then n is

Among the elements Li, K, Ca, S and Kr which one has the lowest first ionization enthalpy? Which has the highest first ionization enthalpy?

If a_(1), a_(2),…a_(n) are in H.P. then a_(1).a_(2) + a_(2).a_(3) + a_(3).a_(4) + …+ a_(n-1) .a_(n) =

Two rods of same length and areas of cross-section A_(1) and A_(2) have their ends maintained at same temperature. If K_(1) and K_(2) are their thermal conductivities, c_(1) and c_(2) are the specific heats of their material and rho_(1),rho_(2) their densities, then for the rate of flow by conduction through them to be equal

A chemical reaction occurs in three paths having rate constants k_(1),k_(2) and k_(3) respectively. If Ea_(1),Ea_(2) and E_(a_(3) are 4,5 and 8kJ respectivel and overall rate constant k=(k_(1)k_(3))/(k_(2)) . Assuming A_(av)=(A_(1)A_(3))/(A_(2)) the overall energy of activation in kJ is __________

A certain endothermic reaction: Ato Product, DeltaH=+ve proceeds ina sequence of three elementary steps with the rate constant K_(1),K_(2) and K_(3) and each one having energy of activation E_(1),E_(2) and E_(3) respectively at 25^(@)C . The observed rate constannt for the reaction is equal to K_(3)sqrt((K_(1))/(K_(2))) . A_(1),A_(2) and A_(3) are Arrhenius parameters respectively. Which represents the correct value if catalyst is not present: