Home
Class 11
CHEMISTRY
HA is a weak acid. The pH of 0.1 M HA s...

HA is a weak acid. The pH of 0.1 M HA solution is 2. What is the degree of dissociation `(alpha)` of HA ?

A

`0.5`

B

`0.2`

C

`0.1`

D

`0.301`

Text Solution

Verified by Experts

The correct Answer is:
C
pH = 2, ` :. [H^(+)] = 10^(-2) = 0.01 `
For weak acid , `[H^(+)] = alpha .C `
or `0.01 = alpha xx 0.1 hArr alpha = 0.1 `
Promotional Banner

Topper's Solved these Questions

  • IONIC EQUILIBRIUM

    ERRORLESS|Exercise PAST YEARS QUESTIONS|64 Videos

  • IONIC EQUILIBRIUM

    ERRORLESS|Exercise ASSERTION AND REASON |9 Videos

  • IONIC EQUILIBRIUM

    ERRORLESS|Exercise NCERT BASED QUESTIONS (COMMON ION EFFECT, ISOHYDRIC SOLUTIONS, SOLUBILITY PRODUCT, IONIC PRODUCT OF WATER AND SALT HYDROLYSIS)|59 Videos

  • HYDROGEN

    ERRORLESS|Exercise ASSERTION & REASON|6 Videos

  • PURIFICATION, CLASSIFICATION AND NOMENCLATURE OF ORGANIC COMPOUNDS

    ERRORLESS|Exercise ASSERTION & REASON|9 Videos

Similar Questions

Explore conceptually related problems

The pH of a 0.1 M aqueous solution of a weak acid (HA) is 3. What is its degree of dissociation ?

HA is a weak acid . No. of moles = 0.001, K_a = 2x 10^(-6) , HCl is added with molarity 0.01 and the solution is made 1 litre. calculate degree of dissociation of HA

The pH of 0.1 M solution of a weak acid is 3. What is the value of the ionisation constant for the acid?

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 ?

A monoprotic acid in 0.1 M solution has K_(a)=1.0xx10^(-5) . The degree of dissociation for acid is

0.1M solution of which of the following has almost unity degree of dissociation ?

ERRORLESS-IONIC EQUILIBRIUM-NCERT BASED QUESTIONS (HYDROGEN ION CONCENTRATION- PH SCALE AND BUFFER SOLUTION)
  1. Which of the following does not make any change in pH when added to 10...

    Text Solution

    |

  2. The number of H^(+) ions present in 250 ml of lemon juice of pH=3 is

    Text Solution

    |

  3. HA is a weak acid. The pH of 0.1 M HA solution is 2. What is the degr...

    Text Solution

    |

  4. The concentration of hydronium (H(3)O^(+)) ion in water is

    Text Solution

    |

  5. Solubility product of Mg(OH)2 at ordinary temperature is 1.96xx10^(-11...

    Text Solution

    |

  6. A base dissolved in water yields a solution with a hydroxide ion conce...

    Text Solution

    |

  7. Pure water is kep in a vessel and it remains exposed to atmospheric CO...

    Text Solution

    |

  8. The pH of 10^(-8) molar aqueous solution of HCl is

    Text Solution

    |

  9. A strong acid is titrated with weak base. At equivalence point, pH wil...

    Text Solution

    |

  10. 10^(-6) M NaOH is diluted by 100 times. The pH of diluted base is

    Text Solution

    |

  11. The pH of the solution containing 10 mL of 0.1N NaOH and 10 mL of 0.05...

    Text Solution

    |

  12. The pH of 0.01 molar solution of HCl will be

    Text Solution

    |

  13. If pK(a) of acetic acid and pK(b) of ammonium hydroxide are 4.76 each....

    Text Solution

    |

  14. The pH value of N//10 NaOH is

    Text Solution

    |

  15. If H^(+) ion concentration of a solution is increased by 10 times its ...

    Text Solution

    |

  16. The pH of the solution is 4. The hydrogen ion concentration of the sol...

    Text Solution

    |

  17. Determine the pH of the solution that results from the addition of 20....

    Text Solution

    |

  18. The pK(a) of acetic acid is 4.74 . The concentration of CH(3)C O O H ...

    Text Solution

    |

  19. The concentration of [H^(+)] and concentration of [OH^(-)] of a 0.1 aq...

    Text Solution

    |

  20. pH of a solution produced when an aqueous soution of pH =6 is mixed wi...

    Text Solution

    |