Home
Class 12
CHEMISTRY
The pK(a) values of the three weak acids...

The `pK_(a)` values of the three weak acids HA, HB and HC are 4.74, 3.75 and 4.20, respectively. Arrange them in order their of increasing acid strengths.

Text Solution

Verified by Experts

As `pK_(a)=-log_(10)K_(a)`, the smaller the value of `K_(a)` means the larger the value of `pK_(a)`. So, an acid with a larger `pK_(a)` will have smaller `K_(a)`. As, `pK_(a)(HB) lt pK_(a)(HC) lt pK_(a)(HA),K_(a)(HB) gt K_(a)(HC) gt K_(a)(HA)`. Ata certain temperature, a higher value of `K_(a)` for an acid indicates a higher strength of the acid. therefore, the increasing order of acid strengths of the given acids will be -`Ha lt HC lt HB`.
Promotional Banner

Topper's Solved these Questions

  • EQUILIBRIUM

    CHHAYA PUBLICATION|Exercise QUESTION ANSWER ZONE FOR BOARD EXAMINATION SHORT ANSWER TYPE|38 Videos

  • EQUILIBRIUM

    CHHAYA PUBLICATION|Exercise QUESTION ANSWER ZONE FOR BOARD EXAMINATION LONG ANSWER TYPE|13 Videos

  • EQUILIBRIUM

    CHHAYA PUBLICATION|Exercise WARM UP EXERCISE|153 Videos

  • ENVIRONMENTAL CHEMISTRY

    CHHAYA PUBLICATION|Exercise PRACTICE SET 14(Answer the following questions)|6 Videos

  • GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

    CHHAYA PUBLICATION|Exercise PRACTICE SET 6|10 Videos

Similar Questions

Explore conceptually related problems

pK_(a) values of three weak acids HA, HB and HC are 4.74, 3.35 and 5.24 respectively. The concentration of aqueous solutions of each of the three acids is 0.01 (M). Arrange them in order of increasing pH values.

The molecular masses of A,B,C are 2,4 and 28, respectively. Arrange them according to their increasing rates of diffusion.

pK_a values for two acids, HA and HB are 4 and 6 respectively. Which one is the stronger acid?

At a certain temperature, the ionisation constannt of three weak acids HA, HB and HC are 4.0xx10^(-5),5.2xx10^(-4) and 8.6xx10^(-3) , respectively. If the molar concentrations of their solutions are the same, then arrange them in order of their increasing strength.

At a definite temperature, the total pressure of a gas-mixture consisting of three gases A, B and C is P. If the number of moles of A, B and C are 2, 4 and 6, respectively, then arrange these gases in increasing order of their partial pressures.

The critical temperature of H_(2),NH_(3) and CO_(2) gases are 5K, 405 K and 304 K, respectively. Arrange them in the increasing order of their intermolecular forces of attraction.

pK_a of a weak acid (HA) and pK_b of a weak base (BOH) are 3.2 and 3.4, respectively. The pH of their salt (AB) solution-

pK_(a) of a weak acid (HA) and p K_(b) of a weak base (BOH) are 3.2 and 3.4 respectively . The pH of their salt (AB) solution is -

pK_a values for two acids, HA , and HB are 4 and 5 respectively.' If each of the acid solution has a concentration of 0.1(M), then in which solution the molar concentration of H_3O^+ ion is greater ?

Sodium salts of three monobasic acids, HA, HB and HC are HaA, NaB and NaC, respectively. The concentration of each of the aqueous solution of the aqueous solution of these salts is 0.1(M) and the pH of their solutions are 7,9 and 10, respectively. Among HA, HB and HC, which is (are) strong acid(s)?

CHHAYA PUBLICATION-EQUILIBRIUM-QUESTION ANSWER ZONE FOR BOARD EXAMINATION (very short answer type)
  1. In case of thermal decomposition of H(2)(g) to H(g), which conditions...

    Text Solution

    |

  2. In case of the reaction A(2)(g) +4B(2)(g) hArr 2AB(4)(g), the change i...

    Text Solution

    |

  3. How will equilibrium of the reaction, H(2)(g)+I(2)(g)hArr 2HI(g) be af...

    Text Solution

    |

  4. Each of HS^(-) and NH(3) can act as both Bronsted acid and Bronsted ba...

    Text Solution

    |

  5. In the reaction I(2)+I^(-)toI(3)^(-), which one acts as a Lewis base?

    Text Solution

    |

  6. The pK(a) values of the three weak acids HA, HB and HC are 4.74, 3.75 ...

    Text Solution

    |

  7. X and Y are two aqueous solutions of acid HA with concentrations 0.1 M...

    Text Solution

    |

  8. Which one of the following two acids will have a higher concentration ...

    Text Solution

    |

  9. Show that [OH^(-)] gt sqrt(K(w)) in an alkaline solution.

    Text Solution

    |

  10. Will the concentration of H(3)O^(+) ions in pure water at 0^(@)C be mo...

    Text Solution

    |

  11. At a certain temperature, what is the value for the sum of pH annd pOH...

    Text Solution

    |

  12. Show that in pure water, pH=pOH=(1)/(2)pK(w).

    Text Solution

    |

  13. An acid bottle is labelled 'pH=5'. Is this acid a weak acid?

    Text Solution

    |

  14. At a certain temperature, K(w) of pure water=10^(-12) what will be the...

    Text Solution

    |

  15. pH of an aqueous 0.1(M) CH(3)COOH solution is 2.87. state whether pH o...

    Text Solution

    |

  16. At 25^(@)C, the ionisation constant (K(a)) of weak acid HA is 10^(-6)....

    Text Solution

    |

  17. Which of the following mixtures will act as buffer solution(s)? (1) ...

    Text Solution

    |

  18. Here are a few salts. Whose aqueous solution(s) at 25^(@)C has (have) ...

    Text Solution

    |

  19. A liquid is in equilibrium with its vapour as its boiling point. On av...

    Text Solution

    |

  20. According to Le Chatelier's principle, what is the effect of adding he...

    Text Solution

    |