Home
Class 11
CHEMISTRY
Statement-1. The pK(a) of a weak acid be...

Statement-1. The `pK_(a)` of a weak acid becomes equal to pH of the solution at the mid-point of its titration.
Statement-2. The molar concentrations of proton acceptor and proton donor become equal at mid point of a weak acid.

A

Statement-1 is True, Statement-2 is True , Statement-2 is the correct explanation of Statement - 1 .

B

Statement-1 is True, Statement - 2 is True , Statement-2 is NOT a correct explanation for Statement-1.

C

Statement-1 is True, Statement-2 is False.

D

Statement-1 is False, Statement-2 is True.

Text Solution

Verified by Experts

The correct Answer is:
A
Statement-2 is the correct explanation of statement -1, because `pH = pK_(a) +log.(["Salt"])/(["Acid"])`.
At mid poind, [Salt] = [Acid].
Promotional Banner

Topper's Solved these Questions

  • EQUILIBRIUM

    PRADEEP|Exercise Competition Focus (VII. Numerical Value Type Questions) (In Decimal Notation)|1 Videos

  • ENVIRONMENTAL CHEMISTRY

    PRADEEP|Exercise COMPETITION FOCUS (JEE(Main and Advanced)/Medical Entrance (VI.ASSERTION-REASON) Type II|6 Videos

  • EQUILIBRIUM IN PHYSICAL AND CHEMICAL PROCESSES

    PRADEEP|Exercise Competition Focus (Jee(Main and advanced)/Medical Entrance) VIII. ASSERTION - REASON TYPE QUESTIONS (TYPE - II)|10 Videos

Similar Questions

Explore conceptually related problems

Assertion (A): pK_(a) of a weak acid become equal of the pH of the solution at the mid-point of titration. Reason (R) : The molar concentration of the proton donor an proton acceptor beomes equal at the mid-point.

The PK_(a) of a weak acid is 5.85. The concentrations of the acid and its conjugate base are equal at a pH of -

A weak acid is titrated with a weak base. Consider the following statmenets regarding the pH of the solution at the equivalence point : (i) pH depends on the concentration of acid and base. (ii) pH is independent of the concentration of acid and base. (iii) pH depends on the pK_a of acid and pK_b of base. (iv) pH is independent of the pK_a of acid and pK_b of base. The correct statments are :

50 ml of a weak acid , HA , required 30 ml 0.2 M NaOH for the end point . During titration , the pH of acid solution is found to be 5.8 upon addition of 20 ml of the above alkali . The pK_(a) of the weak acid is

PRADEEP-EQUILIBRIUM-Competition Focus (VIII. Assertion-Reason Type Questions)
  1. Statement-1. The pK(a) of a weak acid becomes equal to pH of the solut...

    Text Solution

    |

  2. Assertion (A): pH of HCI solution is less than that of acetic acid of ...

    Text Solution

    |

  3. Statement -1 HCO(3)^(-) ion can act as a strong base. Statement -2 ...

    Text Solution

    |

  4. STATEMENT-1: pH of water decreases with increase in temperature. STA...

    Text Solution

    |

  5. Statement I In water, orthoboric acid behaves as a weak monobasic acid...

    Text Solution

    |

  6. Assertion. Degree of ionization of weak electrolyte increases with dil...

    Text Solution

    |

  7. Assertion. In case of polyprotic acids, first ionization constant in l...

    Text Solution

    |

  8. Assertion (A): pH of neutral solution is always 7. Reason (R) : pH o...

    Text Solution

    |

  9. Asseration : A queous solution of ammonium carbonate is basic. Reaso...

    Text Solution

    |

  10. Assertion. The pH at the end point of any acid-base titration is alway...

    Text Solution

    |

  11. Assertion : Sb (III) is not precipitated as sulphide when in its alkal...

    Text Solution

    |

  12. Assertion: Addition of silver ions to a mixture of aqueous sodium chlo...

    Text Solution

    |

  13. Assertion : On mixing 500 ml of 10^(-6) M Ca^(2+) ion and 500 ml of 30...

    Text Solution

    |

  14. Assertion : NaCl is precipitated when HCl gas is passed in a saturated...

    Text Solution

    |

  15. Assertion. Precipitation of soap is made by the addition of salt (NaCl...

    Text Solution

    |

  16. Assertion. An aqueous solution of ammonium acetate can act as buffer. ...

    Text Solution

    |