Home
Class 12
CHEMISTRY
The pK(a)of an acid having ionisation co...

The `pK_(a)of an acid having ionisation constant `1 xx 10^(-3)` is

A

5

B

`-5`

C

`-9`

D

9

Text Solution

Verified by Experts

The correct Answer is:
A
`pK_(a)=-log K_(a)(K_(a)=` dissociation constant or ionisation constant )
Promotional Banner

Topper's Solved these Questions

  • IONIC EQUILIBRIUM

    DINESH PUBLICATION|Exercise UNIT TEST -2|30 Videos

  • IONIC EQUILIBRIUM

    DINESH PUBLICATION|Exercise BRAIN TEASERS -3|39 Videos

  • HYDROCARBONS

    DINESH PUBLICATION|Exercise All Questions|493 Videos

  • NO IDEA

    DINESH PUBLICATION|Exercise Unit Test -|1 Videos

Similar Questions

Explore conceptually related problems

Calculate the degree og ionisation of 0.04 M HOCl solution having ionisation constant 1.25 xx 10^(-4) ?

Malonic acid is an organic dibasic acid such as H_(2)S having first ionistion constant, K_(1) = 1.42 xx 10^(-3) and second ionisation constant, K_(2) = 2.0 xx 10^(-6) . Compute the divalent molanate ion concentration in: a. 0.001M malonic acid. b. a solution that is 0.0001M in malonc acid and 0.0004M HC1 . c. a solution that is 0.0001 M in malonic acid and 0.1 M HC1 .

Find out the percentage dissociation of an acid having conc. Of 10 M and dissociation constant 1.0xx10^(-3) .

Calcuate the degree of ionisation and pH of 0.05 M solution of a weak base having the ionization constant (K_(b)) is 1.77xx10^(-5). Also calculate the ionisation constnat of the conjugate acid of this base.

Calculate the pH of 0.08 solution of HOCI (hydrochlorous acid). The ionisation constant of the acid is 2.5 xx 10^(-5) . Determine the percent dissociation of HOCI .

The rate constant at 25^(@)C for the reaction of NH_(4)^(+) and OH^(-) to form NH_(4)OH is 4xx10^(10) M^(-1) sec^(-1) and ionisation constant of aq. NH_(3) is 1.8xx10^(-5) . The rate constant of proton transfer to NH_(3) is

100 mL of 0.3 N -Acetic acid solution is mixed with same volume of 0.2 N sodium hydroxide solution. Ionisation constant of acetic acid is 2 xx 10^(-5) the pH of the mixture is

If pK_(b) for floride at 25^(0)C is 11 , the ionisation constant of hydrofluoric acid in water at this temperature is

DINESH PUBLICATION-IONIC EQUILIBRIUM -BRAIN TEASERS -4
  1. What is the pH of 10^(-3) M ammonia cyanide solution, if K(HCN)=7.2 xx...

    Text Solution

    |

  2. If the dissociation constants of two weak acids HA(1) and HA(2) are K(...

    Text Solution

    |

  3. The pK(a)of an acid having ionisation constant 1 xx 10^(-3) is

    Text Solution

    |

  4. In a mixture of weak acid and its salt, the ratio of concentration of ...

    Text Solution

    |

  5. If the solubility of lithium sodium hexafluorido aluminate, Li(3)Na(3)...

    Text Solution

    |

  6. What will be the hydrogen ion concentration of a solution obtained by ...

    Text Solution

    |

  7. The pH of 10^(-8) M NaOH will be

    Text Solution

    |

  8. The pH of a buffer solution of 0.1 M CH(3)COOH and 0.1 MCH(3)COONa is ...

    Text Solution

    |

  9. If the equilibrium concentration of the components in a reaction A+...

    Text Solution

    |

  10. Which of the following when added to 35 mL of the 1.0 M solution of KO...

    Text Solution

    |

  11. The concentration of acetic acid (K(a)=1.8 xx 10^(-5)) required to giv...

    Text Solution

    |

  12. If 20 cc. of HCl solution is exactly neutralised by 40 cc of 0.05 N Na...

    Text Solution

    |

  13. If, H(2)(g)+Cl(2)(g)rarr 2HCl(g) , Delta H^(@)=-44 Kcal 2Na(s)+2HCl...

    Text Solution

    |

  14. For the reaction C(6)H(12)(l)+9O(2)(g) rarr 6H(2)O(L)+6CO(2)(g) Delt...

    Text Solution

    |

  15. Which causes a largest change in pH on addition to 20ml 0.1 M acetic a...

    Text Solution

    |

  16. The equation C (graphite) +O(2)(g) CO(2)(g) Delta H=-395.5kJ can...

    Text Solution

    |

  17. pH of 10^(-9) M HCl is

    Text Solution

    |

  18. The pH of gastric juice in our stomach is

    Text Solution

    |

  19. The equation for Van't Hoff Reaction isotherm is

    Text Solution

    |

  20. The correct decreasing order of calorific values is

    Text Solution

    |