Home
Class 11
CHEMISTRY
Explain the estimation of phosphorus and...

Explain the estimation of phosphorus and sulphur present in the organic compound

Text Solution

Verified by Experts

Estimation of phosphorus : Known mass of organic compound (.a. gm) is heated with fuming `HNO_(3)` in a carius tube. .P. is oxidised to `H_(2)PO_(4)` acid. This acid is precipitated as ammonium phosphomolybdate (.b. gm) by adding ammonia and ammonium molybdate solutions.
`%g` of phosphorus `= (100)/(a) xx (b)/(1877) xx 31 gm`
Molecular mass of `(NH_(4))_(2) PO_(4). 12 MO O_(3)` (ammonium phosphomolybdate) = 1877
Estimation of sulphur : Known mass of organic compound (.a. gm) is heated with sodium peroxide in a carius tube. If sulphur is present it is oxidised to sulphuric acid. The acid is precipitated as barium sulphate (big) by adding excess of aq. `BaCl_(2)` solution. The ppt. is filtered, washed, dried and weighed. `%g` of sulphur `= (100)/(a) xx (b xx 12)/(233) 9`
Molecular mass of `Ba SO _(4) = 233`
Promotional Banner

Topper's Solved these Questions

  • ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise LONG ANSWER QUESTIONS |68 Videos

  • ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise IMPORTANT QUESTIONS|42 Videos

  • ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise VERY SHORY ANSWER QUESTIONS |11 Videos

  • MARCH - 2016 (TELANGANA)

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise SECTION C |3 Videos

  • STATES OF MATTER GASES AND LIQUIDS

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise LONG ANSWER QUESTIONS|22 Videos

Similar Questions

Explore conceptually related problems

Why is a solution of potassium hydroxide used to absorb carbon dioxide evolved during the estimation of carbon present in an organic compound?

3200gm sulphur is present in

Discuss the estimation of nitrogen present in an organic compound by Dumas method. Mention the principles.

The blood red colour in the combination test of nitrogen and sulphur in organic compound is the to the formation of

Lassaigne's test is used for detection of elements N, S, X and P. The sodium fused extract is tested for these elements with appropriate reagents. The observation made in to identify the element present in the organic compound. Sulphur is organic compound on fusion with metallic sodium will be converted into

Explain the estimation of nitrogen of an organic compound by (a) Dumas method and (b) Kjeldahl's method

Explain the estimation of nitrogen of an organic compound by b) Kjeldahl's method