Home
Class 11
CHEMISTRY
For a polyprotic acid, H(3)PO(4) its thr...

For a polyprotic acid, `H_(3)PO_(4)` its three dissociation constanst `K_(1),K_(2)` and `K_(3)` are in the order

A

`K_(1) = K_(2) gt K_(3)`

B

`K_(1) = K_(2) = K_(3)`

C

`K_(1) gt K_(2) gt K_(3)`

D

`K_(1) lt K_(2) lt K_(3)`

Text Solution

Verified by Experts

The correct Answer is:
C
For any polyprotic acid `H_(3)A`, the successive dissociation constants reduces as `K_(1) gt gt K_(2) gt gt K_(3)`.
Promotional Banner

Topper's Solved these Questions

  • IONIC EQUILIBRIUM

    CENGAGE CHEMISTRY|Exercise Ex 8.3|38 Videos

  • IONIC EQUILIBRIUM

    CENGAGE CHEMISTRY|Exercise Ex 8.4|39 Videos

  • IONIC EQUILIBRIUM

    CENGAGE CHEMISTRY|Exercise Ex 8.1|18 Videos

  • HYDROGEN, WATER AND HYDROGEN PEROXIDE

    CENGAGE CHEMISTRY|Exercise Subjective Archive (Subjective)|3 Videos

  • ISOMERISM

    CENGAGE CHEMISTRY|Exercise Assertion-Reasoning Type|1 Videos

Similar Questions

Explore conceptually related problems

In a solution containing 0.1M HCl & 0.1M H_(3)PO_(4) (having dissociation constants K_(a_(1)),K_(a_(2)),K_(a_(3))) assuming alphaltlt1 for H_(3)PO_(4) ,

The dissociation of weak electrolyte (a weak base or weak acid) is expressed in terms of Ostwald's dilution law. An acid is substance which furnishes a proton or accepts an electron pair, where a base is proton acceptor or electron pair donor. Stronger is acid, weaker is its conjugate base. The dissociation constants of an acid (K_(a)) and its conjugate base (K_(b)) are related by K_(w)=K_(a)xxK_(b) , where K_(w) is ionic product of water equal to 10^(-14) at 25^(@)C . The numerical value of K_(w) however increase with temperature. In a solution of an acid or base [H^(+)][OH^(-)]=10^(-14) . Thus the [H^(+)] in a solution is expressed as: [H^(+)]=10^(-pH) and pH+pOH=14 . Buffer solution are the solutions which do not show appreciable change in the pH on addition of small amount of acid or base. Which of the following statements are true ? (1) CIO_(4)^(-) is weak base than CIO_(3)^(-) (2) The degree of dissociation of weak is 1.8xx10^(-9) (3) The equilibrium constant for dissociation of H_(2)O is 1.78xx10^(-16) (4) PO_(4)^(3-) is conjugate acid of HPO_(4)^(2-)

The dissociation of weak electrolyte (a weak base or weak acid) is expressed in terms of Ostwald's dilution law. An acid is substance which furnishes a proton or accepts an electron pair, where a base is proton acceptor or electron pair donor. Stronger is acid, weaker is its conjugate base. The dissociation constants of an acid (K_(a)) and its conjugate base (K_(b)) are related by K_(w)=K_(a)xxK_(b) , where K_(w) is ionic product of water equal to 10^(-14) at 25^(@)C . The numerical value of K_(w) however increase with temperature. In a solution of an acid or base [H^(+)][OH^(-)]=10^(-14) . Thus the [H^(+)] in a solution is expressed as: [H^(+)]=10^(-pH) and pH+pOH=14 . Buffer solution are the solutions which do not show appreciable change in the pH on addition of small amount of acid or base. The removal of PO_(4)^(3-) in qualitative analysis of basic radicals after II gp. is made by using a buffer solution of:

K_(a_(1)), K_(a_(2)) and K_(a_(3)) are the three dissociation constants of H_3PO_4 . Which of the following is a correct order

The dissociation of weak electrolyte (a weak base or weak acid) id expressed in terms of Ostwald dilution law. An acid is a substance which furnishes a proton or accepts an electron pair whereas a base is proton acceptor or electron pair donor. Storonger is the acid weaker is its conjugate base. The dissociation constants of an acid (K_(a)) and its conjugate base are related by (K_(w)=K_(a)xxK_(b) , where K_(w) is ionic prodcut of water equal to 10-14 at 25^(@) C. The numerical value of K_(w) however increases with temperature. In a solution of an acid or base [H^(+)][OH^(-)]=10^(14) .Thus, the [H^(+)] in a solution is expressed as : [H^(+)]=10^(-pH) and pH+pOH=14 . Buffer solutions are the solutions which do not show appreciable change in the pH on addition of small amount of acid or base. Which of the follwoing statement are true? (P) CIO_(4)^(-) is weaker base than CIO_(3)^(-) (Q) The degree of dissociation of water at 25^(@)C is 1.8xx10^(-9) (R)The equilibrium constant for dissociation of H_(2)O is 1.8xx10^(-16) (S) PO_(4)^(3-) is conjugate acid of HPO_(4)^(2-)

If K_(a_1),K_(a_2) and K_a_3) be the first, second and third dissociation constant of H_(3)PO_(4) and K_(a_1)gtgt K_(2_a) gtgtK_(a_3) whis is/are correct :

k_(b_(1)) of N_(2)H_(4) is 4xx10^(-6) .Then what is the acid dissociation constant of N_(2)H_(5)^(+) and N_(2)H_(6)^(+) respectively?

Hydrolysis constants of two salts K_(hA) and K_(hB) of weak acids HA and are 10^(-8) and 10^(-6) . If the dissociation constant of third acid HC is 10^(-2) . The order of acidic strength of three acids will be

CENGAGE CHEMISTRY-IONIC EQUILIBRIUM-Ex 8.2
  1. At 90^(@)C, pure water has [H(3)O^(o+)] = 10^(-6)M. What is the value ...

    Text Solution

    |

  2. HCOOH and CH(3)COOH solutions have equal pH. If K(1)//K(2) is 4, the r...

    Text Solution

    |

  3. 2H(2)O hArr H(3)O^(o+) + overset(Theta)OH,K(w) = 10^(-14) at 25^(@)C, ...

    Text Solution

    |

  4. Which of the following expression is wrong?

    Text Solution

    |

  5. For a 'C'M concentarted solution of a weak electrolyte A(x)B(y)alpha(d...

    Text Solution

    |

  6. K(b) for NH(4)OH is 1.8 xx 10^(-5). The [overset(Theta)OH] of 0.1 M NH...

    Text Solution

    |

  7. The dissociation constant of monobasic acids A, B,C and D are 6 xx 10^...

    Text Solution

    |

  8. The molarity of NH(3) of pH = 12 at 25^(@)C is (K(b) = 1.8 xx 10^(-5))

    Text Solution

    |

  9. K(a) of HA at 25^(@) is 10^(-5). If 0.1mol of this acid is dissolved i...

    Text Solution

    |

  10. For a polyprotic acid, H(3)PO(4) its three dissociation constanst K(1)...

    Text Solution

    |

  11. Given HF + H(@)O overset(K(g))hArr H(3)O^(o+) + f^(o+) F^(Theta) + H...

    Text Solution

    |

  12. A certain weak acid has a dissociation constant 1.0xx10^(-4). The equi...

    Text Solution

    |

  13. The percentage error in [H^(o+)] provided by 10^(-8)M HC1, if ionisati...

    Text Solution

    |

  14. H(3)BO(3) is :

    Text Solution

    |

  15. The enthalpy change for first proton neutralisation of H(2)S is -37.1k...

    Text Solution

    |

  16. The factor by which the degree of ionisation of 200mL of 0.1M benzoic ...

    Text Solution

    |

  17. The concentration of CO(2) in atmosphere is 88ppm. If all of the CO(2)...

    Text Solution

    |

  18. A solution of a weak monoprotic acid has dissociation constant K(a). T...

    Text Solution

    |

  19. Two weak acids HX and HY have K(a) values 1.75 xx 10^(-5) and 1.3 xx 1...

    Text Solution

    |

  20. H(2)S behaves as a weak diprotic acid in aqueous solution. Which of th...

    Text Solution

    |