Home
Class 12
CHEMISTRY
Why conc. sulphuric acid is always dilut...

Why conc. sulphuric acid is always diluted by adding sulphuric acid to water with constant stirring and not water to the acid ?

Text Solution

Verified by Experts

Conc. `H_2 SO_4` has great affinity for water and the process is exothermic.
` H_2 SO_4 + n H_2 O to H_2 SO_4 nH_2 O + "Heat . . . . ."`
If some water is added to conc. `H_2 SO_4` the heat produced vapourises a part of water added thus scattering conc. `H_2 SO_4` all around, which can be very dangerous. On the other hand when some conc. `H_2 SO_4` is added to water, no scattering takes place. The conc. `H_2 SO_4` whose boiling point is very high. Further a constant stirring helps in intermixing the hot and cold solution. Thus avoiding a localised region of high temperature.
Promotional Banner

Topper's Solved these Questions

  • P-BLOCK ELEMENTS

    ACCURATE PUBLICATION|Exercise P-BLOCK GROUP-17 (HALOGEN FAMILY )(2 OR 5 MARK QUESTIONS)|25 Videos

  • P-BLOCK ELEMENTS

    ACCURATE PUBLICATION|Exercise P-BLOCK ELEMENTS GROUP-18 (NOBLE GASES )(2 OR 5 MARK QUESTIONS)|17 Videos

  • P-BLOCK ELEMENTS

    ACCURATE PUBLICATION|Exercise P-BLOCK ELEMENTS GROUP-18 (NOBLE GASES )(1 MARK QUESTIONS)|9 Videos

  • ORGANIC COMPOUNDS CONTAINING NITROGEN COMPOUNDS

    ACCURATE PUBLICATION|Exercise 2 OR 4 MARKS QUESTIONS|27 Videos

  • SOLUTIONS

    ACCURATE PUBLICATION|Exercise NUMERICAL QUESTIONS (3 MARKS)|31 Videos

Similar Questions

Explore conceptually related problems

Why sulphuric acid is oily and viscous liquid ?

Sulphuric acid turns blue litmus red.

Explain why perchloric acid is a strong acid than sulphuric acid.

Why does concentrated sulphuric acid has high boiling point?

250ml of a 1.5M solution of sulphuric acid is diluted by adding 5L of water. what is the molarity of the diluted solution?

ACCURATE PUBLICATION-P-BLOCK ELEMENTS-P-BLOCK (GROUP-16) (OXYGEN FAMILY )(2 OR 5 MARK QUESTIONS)
  1. How would you account for the following : Sulphur has a great tendency...

    Text Solution

    |

  2. Oxygen gas is inert at room temperature why?

    Text Solution

    |

  3. Comment on nature of two S-O bond formed in SO2 molecule. Are the two ...

    Text Solution

    |

  4. Why SF6 is known but OF6 is not known

    Text Solution

    |

  5. Elements of Group 16 generally show lower value of first ionisation en...

    Text Solution

    |

  6. Oxygen gas is inert at room temperature why?

    Text Solution

    |

  7. Milk to cheese is an example of change.

    Text Solution

    |

  8. What is the use of ozone layer?

    Text Solution

    |

  9. What is tailing of mercury ?

    Text Solution

    |

  10. Which form of sulphur shows paramagnetic behaviour and why ?

    Text Solution

    |

  11. Why conc. sulphuric acid is always diluted by adding sulphuric acid to...

    Text Solution

    |

  12. Explain the reducing character of 16th group.

    Text Solution

    |

  13. What is the shape of ozone molecule ?

    Text Solution

    |

  14. Sulphur hexafluoride is used as a gaseous electrical insulator. Explai...

    Text Solution

    |

  15. Discuss the favourble conditions for the manufacture of sulphur trioxi...

    Text Solution

    |

  16. Oleum is: H2S2O7, H2S2O6, H4S2O7, H3S2O7.

    Text Solution

    |

  17. Why does O3 act as a powerful oxidising agent ?

    Text Solution

    |

  18. Explain the manufacture of sulphuric acid by contact process.

    Text Solution

    |

  19. How will ozone oxidise the following : Potassium nitrite to potassium ...

    Text Solution

    |

  20. Draw Flow Chart diagram of Contact Process.

    Text Solution

    |