Home
Class 12
CHEMISTRY
pK(b) of NH(3) is 4.74. The pH when 100 ...

`pK_(b)` of `NH_(3)` is 4.74. The pH when 100 mL of 0.01 M `NH_(3)` solution is 50% neutralised by 0.01 M HCl is

A

4.74

B

2.37

C

9.26

D

9.48

Text Solution

Verified by Experts

The correct Answer is:
C
At `50%` neutralisation
`[NH_(4)^(+)]=[NH_(3)]`
The solution is a buffer
`:. pOH =pK_(b)+log.([NH_(4)^(+)])/([NH_(3)])`
`4.74+log 1 =4.74`
`pH =14-4=9.26`
Promotional Banner

Topper's Solved these Questions

  • IONIC EQUILIBRIUM

    DINESH PUBLICATION|Exercise REVISION QUESTIONS FROM COMPETITVE EXAMS|236 Videos

  • IONIC EQUILIBRIUM

    DINESH PUBLICATION|Exercise SELECTED STRAIGHT OBJECTIVE TYPE MCQs|10 Videos

  • IONIC EQUILIBRIUM

    DINESH PUBLICATION|Exercise Buffer solutions / Salt Hydrolysis|29 Videos

  • HYDROCARBONS

    DINESH PUBLICATION|Exercise All Questions|493 Videos

  • NO IDEA

    DINESH PUBLICATION|Exercise Unit Test -|1 Videos

Similar Questions

Explore conceptually related problems

pK_(a) of CH_(3)COOH is 4.74 . The pH of 0.01 M CH_(3)COONa IS

pH of an aqueous solution of 0.6M NH_(3) and 0.4M NH_(4)CI is 9.4 (pK_(b) = 4.74) . The new pH when 0.1M Ca(OH)_(2) solution is added to it.

pH when 100 mL of 0.1 M H_(3)PO_(4) is titrated with 150 mL 0.1 m NaOH solution will be :

The pK_(a) value of NH_(3) is 5. Calculate the pH of the buffer solution, 1 L of which contains 0.01 M NH_(4)Cl and 0.10M NH_(4)OH :

The pH of a buffer solution of 0.1 M NH_(4)OH [ pK_(a)=4.0] and 0.1 M NH_(4)Cl is

What is the pH of the solution when 100mL of 0.1M HCl is mixed with 100mL of 0.1 M CH_(3) COOH .

Amount of (NH_(4))_(2)SO_(4) which must be added to 50mL of 0.2 M NH_(4)OH solution to yield a solution of pH 9.26 is ( pK_(b) of NH_(4)OH=4.74 )

Calculate the pH of each of the following solution (i) 100 ml of 0.1 M CH_(3)COOH mixed with 100 ml of 0.1 M NaOH. (ii) 100 ml of 0.1 M CH_(3)COOH mixed with 50 ml of 0.1 m NaOH (iii) 50 ml of 0.1 M CH_(3)COOH mixed with 100 ml of 0.1 M NaOH. K_(a)(CH_(3)COOH)=1.8xx10^(-5)

DINESH PUBLICATION-IONIC EQUILIBRIUM -MULTIPLE CHOICE QUESTIONS
  1. K(a) for HCN is 5.0xx10^(-10) at 25^(@)C. For maintaining a constant p...

    Text Solution

    |

  2. pK(a) of CH(3)COOH is 4.74 . The pH of 0.01 M CH(3)COONa IS

    Text Solution

    |

  3. pK(b) of NH(3) is 4.74. The pH when 100 mL of 0.01 M NH(3) solution is...

    Text Solution

    |

  4. The pH of 1 M PO(4)^(3-) (aq) solution is, [ Given pK(b)=(PO(4)^(3-)...

    Text Solution

    |

  5. Hydrolysis constant of NH(4)^(+) is 5.55 xx 10^(-10). The ionisation c...

    Text Solution

    |

  6. The pH of 0.1 M NaHCO(3) is (Given K(a1) and K(a2) for H(2)CO(3) are 6...

    Text Solution

    |

  7. pK(a1) and pK(a(2)) of H(2)CO(3) are 6.38 and 10.26 respectively. The ...

    Text Solution

    |

  8. pK(a1) , pK(a(2)) and pK(a(3)) of H(3)PO(4) are respectively x,y and z...

    Text Solution

    |

  9. pH of the solution containing 50.0 mL of 0.3 M HCl and 50.0 mL of 0.4 ...

    Text Solution

    |

  10. pH at which an acidic indicator with K("in")=1xx10^(-5) changes colour...

    Text Solution

    |

  11. pH at which a basic indicator with K("in")=1xx10^(-10) changes colour ...

    Text Solution

    |

  12. A weak base, B, has basicity constant K(b)=2xx10^(-5). The pH of any s...

    Text Solution

    |

  13. pH of 0.01 M (NH(4))(2) SO(4) and 0.02 M NH(4)OH buffer (pK(a) of NH(4...

    Text Solution

    |

  14. 100mL of pH =6 solution is diluted to 100mL by water. pH of the soluti...

    Text Solution

    |

  15. Auto-ionisation of liquid NH(3) is 2NH(3) hArr NH(4)^(o+) +NH(2)^(Th...

    Text Solution

    |

  16. BOH is a weak base, molar concentration of BOH that provides a [OH]^(-...

    Text Solution

    |

  17. Which of the following solution will have pH of 4.74

    Text Solution

    |

  18. Which of the following mixtures will act as a buffer solution when dis...

    Text Solution

    |

  19. For the reaction S(2)O(3)^(2-)(aq) +2H(3)O^(+)(aq) hArr S(s)+H(2)SO(...

    Text Solution

    |

  20. Both HCOOH and CH(3)COOH solutions have equal pH. If K(1) // K(2) ( r...

    Text Solution

    |