Home
Class 11
CHEMISTRY
How many grams of phosphoric acid would ...

How many grams of phosphoric acid would be needed to neutralise `100 g` of magnesium hydroxide? (The molecular weight are: `H_(3)PO_(4) = 98` and `Mg(OH)_(2) = 58.3)`

A

`66.7 g`

B

`252 g`

C

`112 g`

D

`168 g`

Text Solution

Verified by Experts

The correct Answer is:
C
Meq. of `H_(3)PO_(4)=`Meq. of `Mg(OH)_(2)`
`:.` Meq. of `Mg(OH)_(2)=(100)/(58.3//2)xx100`
`=3430.53`
`(H_(3)P_(4)`is tribasic acid)
`:. (w)/(98//3)xx1000=3430.53`
`:. w=112g`
Promotional Banner

Topper's Solved these Questions

  • MOLE AND EQUIVALENT CONCEPT

    P BAHADUR|Exercise Exercise(3B)Objective problems|15 Videos

  • MOLE AND EQUIVALENT CONCEPT

    P BAHADUR|Exercise Exercise (4) Objective problems|20 Videos

  • MOLE AND EQUIVALENT CONCEPT

    P BAHADUR|Exercise Exercise (2) prevous year numberical problems|25 Videos

  • IONIC EQUILIBRIUM

    P BAHADUR|Exercise Exercise|85 Videos

  • RADIO ACTIVITY

    P BAHADUR|Exercise Exercies 9|99 Videos

Similar Questions

Explore conceptually related problems

How many grams of NaOH will be required to neutralise 12.2 g benzoic acid ?

How many grams of H_(3)PO_(4) is required to completely neutralize 120 g of NaOH

How many series of salts are formed by H_(3)PO_(4) ?

Calcium phosphide Ca_(3)P_(2) formed by reacting magnesium with excess calcium orthophosphate Ca_(s)(PO_(4))_(2) was hydrolysed by excess water. The evolved. Phosphine PH_(5) was burnt in air to yield phosphrous pentoxide (P_(2)O_(6)) . How many gram of magnesium metaphosphate would be obtain if 192 gram Mg were used (Atomic weight of Mg=24, P=31) Ca_(3)(PO_(4))_(2) + Mg to Ca_(3)P_(2) +_ MgO Ca_(3)P_(2)+H_(2)O to Ca(OH)_(2) + PH_(3) PH_(3) + O_(2) to P_(2)O_(5) + H_(2)O MgO + P_(2)O_(5) to Mg(PO_(3))_(2) " " magnesium metaphosphate.

What volume (in mL) of 0.0500 M phospheric acid is needed to titrate completely 25.0 mL of 0.150 M barium hydroxide solution to a phenolphthalein end point ? 3Ba(OH)_(2)+2H_(3)PO_(4) to Ba_(3)(PO_(4))_(2)+6H_(2)

Equivalent weight of H_(3) PO_(2) is ( M rarr molecular weight)

Find the total number of electrons in a molecule of phosphoric acid (H_(3)PO_(4)) .

How many moles of hydrogen, phosphorus and oxygen are there in 0.4 moles of phosphoric acid ( H_(3)PO_(4) ) ?

What should be the order of acidic strength in the series H_(3)PO_(4) , H_(3)PO_(3) , and H_(3)PO_(2) ?

P BAHADUR-MOLE AND EQUIVALENT CONCEPT-Exercise (3A) Objective problems:
  1. When a metal is burnt, its weight is increased by 24%. The equivalent ...

    Text Solution

    |

  2. 0.71 g of chlorine combines with certain weight of a metal giving 1.11...

    Text Solution

    |

  3. How many grams of phosphoric acid would be needed to neutralise 100 g ...

    Text Solution

    |

  4. 100 mL of mixture of NaOH and Na(2)SO(4) is neutralised by 10 mL of 0....

    Text Solution

    |

  5. 0.05 moles of NaHCO(3) will react with how many equivalent of Mg(OH)(2...

    Text Solution

    |

  6. 0.078 g Al(OH)(3). is dehydrated to Al(2)O(3). The Al(2)O(3) so obtain...

    Text Solution

    |

  7. Assuming 100% ionisation, the solution having highest normality is:

    Text Solution

    |

  8. 100 mL of a sample of hard water requires 25.1 mL of 0.02 N H(2)SO(4) ...

    Text Solution

    |

  9. The equivalent weight of potash alum (K(2)SO(4).Al(2)(SO(4))(3).24H(...

    Text Solution

    |

  10. Vapour density of a metal chloride is 6.6. Its oxide contains 53% meta...

    Text Solution

    |

  11. 100 mL of 0.1 M solution of H(2)SO(4) is used to prepare 0.05N solutio...

    Text Solution

    |

  12. Which does not change on dilution?

    Text Solution

    |

  13. 20 mL of 0.1M H(3)BO(3) solution on complete netralisation requires …....

    Text Solution

    |

  14. Volume strength of H(2)O(2) labelled is 10 vol. What is normality of H...

    Text Solution

    |

  15. Find the weight of H(2) SO(4) in 1200 mL of a solution of 0.2 N streng...

    Text Solution

    |

  16. Calculate the volume of 0.5 M H2SO4 required to dissolve 0.5 g of copp...

    Text Solution

    |

  17. 1 g of calcium was burnt in excess of O(2) and the oxide was dissolved...

    Text Solution

    |

  18. Number of H^(+) ions in 100 mL of 0.001 M H(2)SO(4) is:

    Text Solution

    |

  19. 3 g of an oxide of a metal is converted completely to 5 g chloride. Eq...

    Text Solution

    |

  20. V(1) mL of NaOH of normality X and V(2) mL of Ba(OH)(2) of mormality Y...

    Text Solution

    |