Home
Class 11
CHEMISTRY
At 90^@C, pure water has [H3O^+]=10^(-6)...

At `90^@C`, pure water has `[H_3O^+]=10^(-6)` mol/L. What is the value of `K_w` at `90^@C`

A

`10^(-6)`

B

10

C

`10^(-12)`

D

`10^(-14)`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • ENVIRONMENTAL CHEMISTRY

    PATHFINDER|Exercise QUESTION BANK|157 Videos

  • GOC-II & III

    PATHFINDER|Exercise QUESTION BANK|144 Videos

Similar Questions

Explore conceptually related problems

What is the density of pure water at 4^(@)C in SI?

At 25^(@)C , the ionisation constant (K_(a)) of weak acid HA is 10^(-6) . What will the value of ionisationn constant (K_(b)) of its conjugate base (A^(-)) be at that temperature ?

At a certain temperature, K_w of pure water =10^(-12) What will be the pH of a neutral solution at that temperature?

Equilibrium constants are given (in atm) for the following reactions at 0^@C (a) SrCl_2.6H_2O(s) iff SrCl_2.2H_2O(s) + 4H_2.O(g), K_p = 6.89 xx 10^(-12) (b) Na_2HPO_4.12H_2O(s) iff Na_2HPO_4. 7H_2O(s) +5H_2O(g), K_p = 5.25 xx 10^(-13) (c) Na_2SO_4. 10 H_2O(s) iff Na_2SO_4(s) + 10H_2O(g), K_p = 4.08 xx 10^(-25) The vapour pressure of water at 0^@C is 4.58 torr. Which is the most effective drying agent at 0^@C ?

Find [OH^(-)] in pure water if [H_(3)O^(+)] in it is x mol*L^(-1) . Also, find the relation between x and K_(w) .

Will the concentration of H_(3)O^(+) ions in pure water at 0^(@)C be more than or less than that at 4^(@)C ?

At a certain temperature, K_(w) of pure water =10^(-12) what will be the pH-range and pH of the neutral solution at that temperature?

How much heat is required to raise the temperature of 90 g of water from 30^(@)C to 100^(@)C ? [Molar heat capacity of water at constant pressure =75.3J*mol^(-1)*K^(-1) ]

If 0.5 kg of coal on burning raises the temperature of 50 L of water from 20^(@)C to 90^(@)C, then the heat of combustion of coal is nxx10^(6)" cal . Kg"^(-1) . Find the value of n.

PATHFINDER-EQUILIBRIUM-QUESTION BANK
  1. An acidic buffer solution can be prepared by mixing the solution of

    Text Solution

    |

  2. Which of the following salt solution in water is basic?

    Text Solution

    |

  3. At 90^@C, pure water has [H3O^+]=10^(-6) mol/L. What is the value of K...

    Text Solution

    |

  4. pH of 0.05(M) calcium acetate solution (pKa=4.74) is -

    Text Solution

    |

  5. Equal volume of two solutions of pH 3 and 4 are mixed. The pH of the f...

    Text Solution

    |

  6. In the titration of weak acid against strong base, at the half equival...

    Text Solution

    |

  7. The solubility of A2X3 is 'y' mol dm^(-3) its solubility product is -

    Text Solution

    |

  8. The solubility of PbCl2 is

    Text Solution

    |

  9. Conjugate base of HPO4^(-2) is :

    Text Solution

    |

  10. Ostwald's dilution law is applicable to :

    Text Solution

    |

  11. Dissociation constant of a weak acid is Ka and its concentration is C,...

    Text Solution

    |

  12. Which statement is correct :

    Text Solution

    |

  13. At 50^@C pKw of water is 13.26 value of its pH

    Text Solution

    |

  14. Solubility of Ca(OH)2 is sqrt3, value of its solubility product is

    Text Solution

    |

  15. In which of the reaction Kp = Kc

    Text Solution

    |

  16. Equilibrium constant of which reaction is [MX3]^2/([MX2]^2[X2])

    Text Solution

    |

  17. Which of the following mixtures form a buffer solution?

    Text Solution

    |

  18. pH of 10^(-8) molar solution of Hcl in water is

    Text Solution

    |

  19. If the solubility of Ca3(PO4)2 in water be y mol L^(-1), the solubilit...

    Text Solution

    |

  20. Which one among the following ions is the strongest base

    Text Solution

    |