Home
Class 12
CHEMISTRY
A 0.252g sample of unknown organic base ...

A `0.252g` sample of unknown organic base is dissolved in water and titrated with a `0.14 M HCl` solution .After then addition of `20mL` of acid ,a `pH` of `10.7` is recorded. The equivalence point is reached when a total of `40mL` of `HCl` is added . If the base and acid combine in `1:1` molar ratio, then 'a' g is the molar mass of the organic base of 'b' is the ioniation constant of base .Report your answer as `(a)/(1000b)` .

Text Solution

Verified by Experts

At eq.point
No. of millieq. Of Base=No of millieq of `HCl`
`(0.252xx1000)/("Molar mass")=0.14xx40`
:. "Molar mass of base" `=45`
Promotional Banner

Topper's Solved these Questions

  • IONIC EQUILIBRIUM

    RESONANCE|Exercise partIII one or more than one options correct type|7 Videos

  • IONIC EQUILIBRIUM

    RESONANCE|Exercise Part 1 only one option correct type|5 Videos

  • HYDROCARBON

    RESONANCE|Exercise ORGANIC CHEMISTRY(Hydrocarbon)|50 Videos

  • IUPAC NOMENCLATURE & STRUCTURAL ISOMERISM

    RESONANCE|Exercise Advanced Level Problems Part-5|2 Videos

Similar Questions

Explore conceptually related problems

A sample of pure sodium chloride 0.318g is dissolved in water and titrated with HCl solution. A volume of 60mL is required to reach the methyl orange end point. Calculate the molarity of the acid.

When 100 mL of 0.1 M NaCN solution is titrated with 0.1 M HCl solution the variation of pH of solution with volume of HCl added will be :

A 1.025 g sample containing a weak acid HX (mol. Mass=82) is dissolved in 60 mL. water and titrated with 0.25 M NaOH. When half of the acid was neutralised the pH was found to be 5.0 and at the equivalence point the pH is 9.0. Calculate mass precentage of HX in sample :

0.1914 g of an organic acid is dissolved in about 20 mL of water. 25 mL of 0.12 N NaOH is required for complete neutralization of the acid solution. The equivalent mass of the acid is

1.26g of crystalline oxalic acid was dissolved in water to prepare 250 ml of solution. Calculate molarity of solution.