Home
Class 12
CHEMISTRY
The hydrogen electrode is dipped in a so...

The hydrogen electrode is dipped in a solution of pH 3 at `25^@C`. The potential of the cell would be `(2.303 RT//F = 0.059V)` :

A

`0.177V`

B

`0.087V`

C

`0.059V`

D

`-0.177V`

Text Solution

Verified by Experts

The correct Answer is:
d
`pH=3[H^(+)]=10^(-3)`
`E_(red)^(o)+0.059log[ion]`
`E=0+0.059log[10^(-3]`
`E=+0.059(-3)=-0.177V`
Promotional Banner

Topper's Solved these Questions

  • KARNATAKA CET 2003

    KCET PREVIOUS YEAR PAPERS|Exercise CHEMISTRY|60 Videos

  • KARNATAKA CET 2006

    KCET PREVIOUS YEAR PAPERS|Exercise CHEMISTRY|60 Videos

Similar Questions

Explore conceptually related problems

The hydrogen electrode is dipped in a solution of pH=3 at 25^@ C. What is the potential of the electrode?

The pH of a 0.02 M Ca(OH)_2 solution of 25^@C is :

A zinc electrode is placed in 0.1M solution of ZnSO_(4) at 25^(@)C . Assuming salt is dissociated to the extent of 20% at this dilution. The potential of this electrode at this temperature is : (E_(Zn^(2+)|Zn)^(@)=-0.76V) a. 0.79V" ".b. -0.79V" "c. -0.81V." "d. 0.81V

The e.m.f. of a cell is 1.3 V. The positive electrode has a potential of 0.5 V. The potential of negative electrode is :

A hydrogen electrode placed in a buffer solution of sodium cyanide and HCN in the ration of x:y and Y:x has electrode potential value a and b volts, respectively, at 25^(@)C . If the difference a-b=35.52mV, what is the ratio of y:x.

An alloy of Pb-Ag weighing 1.08 g was dissolved in dilute HNO_(3) and the volume made to 100 mL. A silver electrode was dipped in the solution and the e.m.f. of the cell set up Pt(s), H_(2)(g)"|"H^(+)(1M)"||"Ag^(+)(aq)"|"Ag(s) was 0.62 V. If E_("cell")^(@)=0.80V , what is the percentage of Ag in the alloy ? (At 25^(@)C, 2.303RT//F=0.06 )

What would be the electrode potential of a silver electrode dipped in a saturated solution of AgCl in contact with 0.1 M KCl solution at 25^(@)C ? E^(c-)._(Ag^(o+)|Ag)=0.799 V K_(sp) of AgCl=1xx10^(-10)

KCET PREVIOUS YEAR PAPERS-KARNATAKA CET 2005-CHEMISTRY
  1. The temperature of the system decreases in an

    Text Solution

    |

  2. A buffer solution has equal volumes of 0.2 M NH(4)OH and 0.02 M NH(4) ...

    Text Solution

    |

  3. The hydrogen electrode is dipped in a solution of pH 3 at 25^@C. The p...

    Text Solution

    |

  4. 20 ml of 0.5 N HCl and 35 ml of 0.1 N NaOHare mixed. The resulting sol...

    Text Solution

    |

  5. Corrosion of iron is essentially an electrochemical phenomenon where t...

    Text Solution

    |

  6. The standard electrode potential is measured by

    Text Solution

    |

  7. A precipitate of AgCl is formed when equal volumes of the following ar...

    Text Solution

    |

  8. Which one of the following defects in the crystals lowers its density?

    Text Solution

    |

  9. Aradioactive isotope has t(1//2) of 10 days. If today 125 g of it is l...

    Text Solution

    |

  10. Which of the following cannot be accelerated?

    Text Solution

    |

  11. In which of the following nuclear reactions neutron is emitted?

    Text Solution

    |

  12. Molarity of 0.2 N H(2) SO(4) is

    Text Solution

    |

  13. In the equation of state of an ideal gas PV = nRT,the value of the uni...

    Text Solution

    |

  14. A comerical sample of hydrogen peroxide is labelled as 10 volume its ...

    Text Solution

    |

  15. Activated charcoal is used to remove colouring matter from pure substa...

    Text Solution

    |

  16. When plants and animals decay, the organic nitrogen is converted into ...

    Text Solution

    |

  17. Three dimensional molecules with cross links are formed in the case of...

    Text Solution

    |

  18. Sucrose molecule is made up of

    Text Solution

    |

  19. a) Name the water insoluble component of starch.

    Text Solution

    |

  20. An example for a saturated fatty acid, present in nature is

    Text Solution

    |