Home
Class 11
CHEMISTRY
K(a) of HA at 25^(@) is 10^(-5). If 0.1m...

`K_(a)` of `HA` at `25^(@)` is `10^(-5)`. If `0.1mol` of this acid is dissolved in `1L` of aqueous solution, the percent dissociation at equilibrium will be closer to

A

`0.1%`

B

`1.0%`

C

`99.0%`

D

`99.9%`

Text Solution

Verified by Experts

The correct Answer is:
B
`alpha = sqrt((K_(a))/(c)) = sqrt((10^(-5))/(0.1)) = 10^(-2)`
`alpha% 10^(-2) xx 100 = 1%`
Promotional Banner

Topper's Solved these Questions

  • IONIC EQUILIBRIUM

    CENGAGE CHEMISTRY|Exercise Ex 8.3|38 Videos

  • IONIC EQUILIBRIUM

    CENGAGE CHEMISTRY|Exercise Ex 8.4|39 Videos

  • IONIC EQUILIBRIUM

    CENGAGE CHEMISTRY|Exercise Ex 8.1|18 Videos

  • HYDROGEN, WATER AND HYDROGEN PEROXIDE

    CENGAGE CHEMISTRY|Exercise Subjective Archive (Subjective)|3 Videos

  • ISOMERISM

    CENGAGE CHEMISTRY|Exercise Assertion-Reasoning Type|1 Videos

Similar Questions

Explore conceptually related problems

A weak acid, HA, has a K_(a) of 1.00xx10^(-5) . If 0.100 mol of the acid is dissolved in 1 L of water, the percentage of the acid dissociated at equilibrium is the closed to

Vant Hoff factor for a dilute aqueous solution of HCN is 1.00002. The percent degree of dissociation of the acid is :

The K_(sp) of AgCI at 25^(@)C is 1.5 xx 10^(-10) . Find the solubility (in g^(-1)L^(-1)) in an aqueous solution containing 0.01M AgNO_(3) .

13.5 g of an acid HA of molecular mass 135 was dissolved in 10 litres of aqueous solution Calculate the pH of the solution assuming the acid to be completely dissociated.

CENGAGE CHEMISTRY-IONIC EQUILIBRIUM-Ex 8.2
  1. At 90^(@)C, pure water has [H(3)O^(o+)] = 10^(-6)M. What is the value ...

    Text Solution

    |

  2. HCOOH and CH(3)COOH solutions have equal pH. If K(1)//K(2) is 4, the r...

    Text Solution

    |

  3. 2H(2)O hArr H(3)O^(o+) + overset(Theta)OH,K(w) = 10^(-14) at 25^(@)C, ...

    Text Solution

    |

  4. Which of the following expression is wrong?

    Text Solution

    |

  5. For a 'C'M concentarted solution of a weak electrolyte A(x)B(y)alpha(d...

    Text Solution

    |

  6. K(b) for NH(4)OH is 1.8 xx 10^(-5). The [overset(Theta)OH] of 0.1 M NH...

    Text Solution

    |

  7. The dissociation constant of monobasic acids A, B,C and D are 6 xx 10^...

    Text Solution

    |

  8. The molarity of NH(3) of pH = 12 at 25^(@)C is (K(b) = 1.8 xx 10^(-5))

    Text Solution

    |

  9. K(a) of HA at 25^(@) is 10^(-5). If 0.1mol of this acid is dissolved i...

    Text Solution

    |

  10. For a polyprotic acid, H(3)PO(4) its three dissociation constanst K(1)...

    Text Solution

    |

  11. Given HF + H(@)O overset(K(g))hArr H(3)O^(o+) + f^(o+) F^(Theta) + H...

    Text Solution

    |

  12. A certain weak acid has a dissociation constant 1.0xx10^(-4). The equi...

    Text Solution

    |

  13. The percentage error in [H^(o+)] provided by 10^(-8)M HC1, if ionisati...

    Text Solution

    |

  14. H(3)BO(3) is :

    Text Solution

    |

  15. The enthalpy change for first proton neutralisation of H(2)S is -37.1k...

    Text Solution

    |

  16. The factor by which the degree of ionisation of 200mL of 0.1M benzoic ...

    Text Solution

    |

  17. The concentration of CO(2) in atmosphere is 88ppm. If all of the CO(2)...

    Text Solution

    |

  18. A solution of a weak monoprotic acid has dissociation constant K(a). T...

    Text Solution

    |

  19. Two weak acids HX and HY have K(a) values 1.75 xx 10^(-5) and 1.3 xx 1...

    Text Solution

    |

  20. H(2)S behaves as a weak diprotic acid in aqueous solution. Which of th...

    Text Solution

    |