Home
Class 11
CHEMISTRY
The pK(a) of HCN is 9.30. The pH of a so...

The `pK_(a)` of `HCN` is 9.30. The pH of a solutin prepared by mixing `2.5` moles of `KCN` and `2.5` moles of `HCN` in water and making up the total volume to `500 mL` is

A

`9.3`

B

`7.3`

C

`10.3`

D

`8.3`

Text Solution

Verified by Experts

The correct Answer is:
D
`P^(H) = P^(ka) + "log" ("no. of moles of salt")/("no. of moles of acid")`
Promotional Banner

Topper's Solved these Questions

  • IONIC EQUILIBRIUM

    NARAYNA|Exercise Level-V (H.W)|125 Videos

  • IONIC EQUILIBRIUM

    NARAYNA|Exercise Level-VI (H.W)|35 Videos

  • IONIC EQUILIBRIUM

    NARAYNA|Exercise Level-I (H.W)|50 Videos

  • HYDROGEN & ITS COMPOUNDS

    NARAYNA|Exercise LEVEL-4|21 Videos

  • PERIODIC TABLE

    NARAYNA|Exercise All Questions|568 Videos

Similar Questions

Explore conceptually related problems

The pK_(b) of CN^(Theta) is 4.7 . The pH is solution prepared by mixing 2.5 mol of 2.5 mol of KCN of 2.5 mol of HCN in water and making the total volume upto 500mL is

The dissociation constant of HCN is 5 xx 10^(-10) . The pH of the solution prepared by mixing 1.5 mole of HCN and 0.15 moles of KCN in water and making up the total volume to 0.5 dm^(3) is

The pH of a solution prepared by mixing 2.0 mL of HCI solution of pH 3.0 and 3.0 mL of NaOH of pH 10.0 is

Find the pH of a solution prepared by mixing 25ml of a 0.5M solution of HCI,10ml of a 0.5M solution of NaOH and 15 ml of water :-

The pH of a solution obtained by mixing 50 mL of 1N HCl and 30 mL of 1N NaOH is [log 2.5 =0.3979]

Find the pH of solution prepared by mixing 25 ml of a 0.5 M solution of HCl, 10 ml of a 0.5 M solution of NaOH and 15 ml of water

NARAYNA-IONIC EQUILIBRIUM-Level-II (H.W)
  1. HA is a weak acid [K(a) = 10^(-4)] and BOH is a weak base [K(b) = 10^(...

    Text Solution

    |

  2. K(h) of salt obtained from strong acid and weak base is 2 xx 10^(-5). ...

    Text Solution

    |

  3. Which of the following solution will have P^(H) closer to 1.0?

    Text Solution

    |

  4. Which of the following mixture is not a buffer solution

    Text Solution

    |

  5. The pK(a) of HCN is 9.30. The pH of a solutin prepared by mixing 2.5 m...

    Text Solution

    |

  6. An acidic buffer contains 0.06 M salt and 0.02 M acid. The dissociatio...

    Text Solution

    |

  7. 25 mL of 0.4 M of a weak base and 75 mL of 0.2 M of its salt forms a b...

    Text Solution

    |

  8. A solution consist of 0.2 M NH(4)OH and 0.2 M NH(4)Cl. If K(b) of NH(4...

    Text Solution

    |

  9. Concentration of NH(4)Cl and NH(4)OH in a buffer solution are in the r...

    Text Solution

    |

  10. A basic buffer contains equal concentration of base and its salt. The ...

    Text Solution

    |

  11. When 0.48 moles of base is added to 1L buffer solution its P^(H) of ch...

    Text Solution

    |

  12. 0.002 moles of an acid is added to a litre of buffer solution, decreas...

    Text Solution

    |

  13. 12g of CH(3)COOH and 4g of NaOH are mixed and diluted to 1 litre solut...

    Text Solution

    |

  14. 1 lit of buffer solution contains 0.1 mole each of NH(4)OH and NH(4)Cl...

    Text Solution

    |

  15. A solution contains 60 mL of 0.1 M NH(4)OH and 30 mL of 0.1 MHCl. The ...

    Text Solution

    |

  16. The solubility of AgCl will be miniumum in

    Text Solution

    |

  17. The solubility of Ag(2)CrO(4) is 2 xx 10^(-2) "mol"//"lit" its solubil...

    Text Solution

    |

  18. The solubility product of a rare earth metal hydroxide M(OH)(3) at roo...

    Text Solution

    |

  19. The solubility of PbSO(4) in 0.1M Na(2)SO(4) solution is (K(sp) of PbS...

    Text Solution

    |

  20. The molar solubility of M(OH)(3) in 0.4 M M(NO(3))(3) solution inters...

    Text Solution

    |