Home
Class 11
CHEMISTRY
Two buffer solutions A and B each made w...

Two buffer solutions `A` and `B` each made with benzoic acid and sodium benzoate differ in their `pH` by two units. A has salt`:` acid`a:b. B` has salt`:` acid `=b:a.` If `agtb`, then the value of `a:b` is
`a. 3.17" "b.10.0" "c.3.0" "d. 6.0`

A

`10,000`

B

`3.17`

C

`6.61`

D

`2.10`

Text Solution

Verified by Experts

The correct Answer is:
B
Buffer `(A):`
`pH_(1) =pK_(a) + log ((x)/(y)) …(i)`
Buffer `(B):`
`pH_(2) = pK_(a) + log ((x)/(y)) …(ii)`
Since `x gty`.
`:. pH_(1) - pH_(2) = 1 = "log" (x)/(y) -"log"(y)/(x)`
`:. 1=2"log"(x)/(y)`
`"log"(x)/(y) = (1)/(2) = 0.5`
`(x)/(y) = "Antilog" (0.5) = 3.17`.
Promotional Banner

Topper's Solved these Questions

  • IONIC EQUILIBRIUM

    CENGAGE CHEMISTRY ENGLISH|Exercise Exercises Assertion-Reasoning|36 Videos

  • IONIC EQUILIBRIUM

    CENGAGE CHEMISTRY ENGLISH|Exercise Exercises Integer|10 Videos

  • IONIC EQUILIBRIUM

    CENGAGE CHEMISTRY ENGLISH|Exercise Exercises Multiple Correct|33 Videos

  • HYDROGEN, WATER AND HYDROGEN PEROXIDE

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

  • ISOMERISM

    CENGAGE CHEMISTRY ENGLISH|Exercise Assertion-Reasoning Type|1 Videos

Similar Questions

Explore conceptually related problems

If ab=2a + 3b, a>0, b>0, then the minimum value of ab is

If ab=2a+3b, agt0, b gt0 , then the minimum value of ab is

1.0 L solution is prepared by mixing 61 g benzoic acid (pK_(a)=4.2) with 72 g of sodium benzoate and then 300 mL 1.0 M HBr solution was added. The pH of final solution is :

The three vectors a, b and c with magnitude 3, 4 and 5 respectively and a+b+c=0, then the value of a.b+b.c+c.a is

The pH of an acetic acid + sodium acetate buffer is given by pH = pK_(a) + log . "[Salt]"/"[Acid]" " where " K_(a) of acetic acid = 1.8 xx 10^(-5) If [Salt] = [Acid] = 0.1 M, then the pH of the solution would be about

The dissociation constant of a substitued benzoic acid at 25^(@)C is 1.0 xx 10^(-4) . Find the pH of a 0.01M solution of its sodium salt.

Solution A has a pH of 12, solution B has a pH of 4 and solution C has a pH of 3 which solution: Is a strong acid

If a ,b ,c are different, then the value of |[0,x^2-a, x^3-b],[ x^2+a,0,x^2+c],[ x^4+b, x-c,0]| is a. c b. a c. b d. 0

100mL of a buffer solution contains 0.1M each of weak acid HA and salt NaA . How many gram of NaOH should be added to the buffer so that it pH will be 6 ? (K_(a) of HA = 10^(-5)) .

A hydrogen electrode X was placed in a buffer solution of sodium acetate ad acetic acid in the ratio a:b and another hydrogen electrode Y was placed in a buffer solution of sodium acetate ad acetic in the ratio b:a if reduction potential values for two cells are found to be E_(1) and E_(2) respectively w.r.t. standard hydrogen electrode, the pK_(a) value of the acid can be given as (A) (E_(1)-E_(2))/(0.118) (B). -(E_(1)+E_(2))/(0.118) (C). (E_(1))/(E_(2))xx0.118 (D). (E_(2)-E_(1))/(0.118)

CENGAGE CHEMISTRY ENGLISH-IONIC EQUILIBRIUM-Exercises Single Correct
  1. The best indicator for the detection of end point in titration of a we...

    Text Solution

    |

  2. When a solid KCI is added to a saturated solution of AgCI "in" H(2)O,

    Text Solution

    |

  3. Two buffer solutions A and B each made with benzoic acid and sodium be...

    Text Solution

    |

  4. CaCO(3) and BaCO(3) have solubility product values 1 xx 10^(-8) and 5 ...

    Text Solution

    |

  5. The pH of an acidic buffer can be raised by 2units by

    Text Solution

    |

  6. A buffer solution can be prepared from a mixture of

    Text Solution

    |

  7. 20 mol of M//10 CH(3)COOH solution is titrated with M//10 NaOH solutio...

    Text Solution

    |

  8. The K(sp) value of CaCO(3) and CaC(2)O(4) in water are 4.7 xx 10^(-9) ...

    Text Solution

    |

  9. What are the units in which the solubility product of Ca(3)(PO(4))(2) ...

    Text Solution

    |

  10. The Ph of 10^(-5)MHCl solution if 1 " mL of " it is diluted to 1000 mL...

    Text Solution

    |

  11. Which of the following when mixed, will given a solution with pH gt 7.

    Text Solution

    |

  12. A solution of CaF(2) is found to contain 4 xx 10^(-4)M of F^(Theta), K...

    Text Solution

    |

  13. At what pH will a 1.0 xx 10^(-3)M solution of an indicator with K(b) =...

    Text Solution

    |

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

    Text Solution

    |

  15. pH signifies:

    Text Solution

    |

  16. A solution with pH = 2 is more acidic than one with a pH = 6 by a fact...

    Text Solution

    |

  17. A definite volume of an aqueous N//20 acetic acid (pK(a) = 4.74) is ti...

    Text Solution

    |

  18. The pK(a) of acteylsalicylic acid (aspirin) is 3.5. The pH of gastric ...

    Text Solution

    |

  19. Which of the following salt is basic?

    Text Solution

    |

  20. For the indicator 'HIn' the ratio (Ind^(Θ))//(HIn) is 7.0 at pH of 4.3...

    Text Solution

    |