Home
Class 11
CHEMISTRY
In the titration of solution of a weak a...

In the titration of solution of a weak acid HA and NaOH, the pH is 5.0 after 10 mL of NaOH solution has been added and 5.60 after 20 mL NaOH has been added.
What is the value of `pK_(a)` for HA?

A

`5.15`

B

`5.3`

C

`5.6`

D

None of these

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • GASEOUS STATE

    NARENDRA AWASTHI|Exercise Level 3 - Subjective Problems|1 Videos

  • SOLID STATE

    NARENDRA AWASTHI|Exercise Level 3 - Subjective Problems|1 Videos

Similar Questions

Explore conceptually related problems

In the titration of a solution of a weak acid HX with NaOH , the pH is 5.8 after 10mL of NaOH solution has been added and 6.40 after 20mL of the NaOH has been affed. What is the ionisation constant of the acid HX ?

In the titration of a solution of a weak base BOH with HCI has pH is 8.2 after 10 ml of HCI solution has been added and 7.6 after 20 ml of HCI solution has been added. Calculate the value of pK_(b) of the base and express your answer as ab.cd [For example if your answer is 3.8 then write answer as 0380] [Given : log 2 = 0.3 ]

The equivalent point in titration of 40.0 ml of a solution of a weak monoprotic acid occurs when 35.0 of a 0.10 M NaOH solution has been added . The pH of the solution is 5.75 after the addition of 20.0 ml of NaOH solution . What is the dissociation constant of the acid ?

10mL of 2(M) NaOH solution is added to 200mL of 0.5 (M) of NaOH solution. What is the final concentration?

Calculate the pH of the solutions when following conditions are provided: a. 20mL of M//10 CH_(3)COOH solution is titrated with M//10 solution of NaOH . i. No titration is carried out. ii. When 10mL of NaOH is added. iii. When 20mL of NaOH is added. iv. When 30mL of NaOH is added. (pK_(a) of CH_(3) COOH = 4.74) b. 20mL of M//10 NaOH solutions sio titrated with M//10 solution of CH_(3)COOH . i. No titration is carried out. ii. When 18mL of Ch_(3)COOH is added. iii. When 20mL of CH_(3)COOH is added. iv. When 40mL of CH_(3)COOH is added. c. 10mL of M//10 NH_(4)OH solution is titrated with M//10 solution of H_(2)SO_(4) . i. No titration is carried out. ii. When 4mL of H_(2)SO_(4) is added. iii. When 5mL of H_(2)SO_(4) is added. iv. When 10mL of H_(2)So_(4) is added. pK_(a) of NH_(4)OH = 4.76 d. 10mL of M//10H_(2)SO_(4) solution is titrated with M//10 solution of NH_(4)OH . i. No titration is carried out. ii. When 10mL of NH_(4)OH is added. iii. When 20mL of NH_(4)OH is added. When 40mL of NH_(4)OH is added.

The equivalent point in a titration of 40.0mL of a sodium of a weak monoprotic acid occurs when 35.0mL of a 0.10M NaOH solutio has been added. The pH of the solution is 5.5 after the addition of 20.0mL of NaOH solution. What is the dissociation constant of the acid ?

A volume of 50.00 mL of a weak acid of unknown concentration is titrated with 0.10 M solution of NaOH . The equivalence point is reached after 39.30 mL of NaOH solution has been added. At the half-equivalence point (19.65 mL) , the pH is 4.85 . Thus, initial concentration of the acid and its pK_(a) values are

NARENDRA AWASTHI-IONIC EEQUILIBRIUM-Exercise
  1. When a 20 mL of 0.08 M weak base BOH is titrated with 0.08 M HCl, the ...

    Text Solution

    |

  2. Calculate approximate pH of the resultant solution formed by titration...

    Text Solution

    |

  3. In the titration of solution of a weak acid HA and NaOH, the pH is 5.0...

    Text Solution

    |

  4. A(3)B(2) is a sparingly soluble salt with molar mass M(gmol(-)) and so...

    Text Solution

    |

  5. A solution is 0.10 M Ba(NO(3))(2) and 0.10 M Sr(NO(3))(2.) If solid Na...

    Text Solution

    |

  6. A solution is 0.01 M Kl and 0.1 M KCl. If solid AgNO(3) is added to th...

    Text Solution

    |

  7. Which of the following are conjugate acid-base pairs ?

    Text Solution

    |

  8. If K(a1),K(a2) and Ka3) be the first, second and third dissociation co...

    Text Solution

    |

  9. H(2)A is a weak diprotic acid. If the pH of 0.1 M H(2)A solution is 3 ...

    Text Solution

    |

  10. Statement-1: pH value of acidic buffer solution changes , If buffer so...

    Text Solution

    |

  11. Assertion : In a titration of weak monoprotic acid with strong base, t...

    Text Solution

    |

  12. Assertion: In the titration of Na(2)CO(3) with HCl using methyl orange...

    Text Solution

    |

  13. Assertion : Solubility of AgCl in NH(3)(aq) is greater than in pure wa...

    Text Solution

    |

  14. Assertion (A): Solubility of AgCN in acidic solutions is greater than ...

    Text Solution

    |

  15. Calculate pOH of 0.1 M aq. Solution of weak base BOH (K(b)=10^(-7)) at...

    Text Solution

    |

  16. pH of 0.01 M aq. Solution of HA is 4. Find the value of pK(a) of HA at...

    Text Solution

    |

  17. Calculate approximate pH of 10^(-10) M NaOH at 25^(@)C.

    Text Solution

    |

  18. Calclate pH of a resultant solution of 25 mL of 0.1 M HCl, 50 mL of 0....

    Text Solution

    |

  19. Calculate pH of a resultant solution of 0.1 M HA (K(a)=10^(-6)) and 0....

    Text Solution

    |

  20. 0.16g of N(2)H(4) are dissolved in water and the total volume made upt...

    Text Solution

    |