Microcosmic salt bead test, Chemistry

Assignment Help:

Microcosmic Salt Bead Test

Microcosmic salt, Na(NH4)HPO4.4H2O is as well used to identify specific cations just as borax. While microcosmic salt is burned in a loop of platinum wire, a colourless transparent bead of sodium metaphosphate is formed.

Na(NH4) HPO4. 4H2O → Na (NH4)HPO4 + 4H2O

Na (NH4) HPO4 → NaPO3 + NH3 + H2O

Now NaPO3 reacts with metallic oxides to give coloured orthophosphates.

NaPO3 + CuO → NaCuPO4 (Blue)

NaPO3 + CoO → NaCuPO4 (Blue)

NaPO3 + Cr2O3 → NaPO3. Cr2O3 (Green)


Related Discussions:- Microcosmic salt bead test

Properties of gases, Properties of Gases Gases are easily expandable ,c...

Properties of Gases Gases are easily expandable ,compressible unlike solids and liquids. Gases are measurured in pressure.Pressure is defined as force exerted per unit area of

Titration (calculating free hcl and total acidity), We performed a titratio...

We performed a titration in the lab with mock gastric juice and potassium hydroxide. We titrated to end point and then to another colour change and noted both the volumes. We are n

Determine equilibrium constants for acid and base, Q. Determine Equilibrium...

Q. Determine Equilibrium Constants for Acid and base? Ans. The  pH scale  of acidity is a simple and convenient way to state the acidity of a solution. The

Determine about the antiferromagnetic materials, Determine about the Antife...

Determine about the Antiferromagnetic materials Antiferromagnetic materials are materials in which almost all magnetic dipoles are linked up antiparallel to each other. Its sus

When an electron revolves in a stationary orbit then, When an electron revo...

When an electron revolves in a stationary orbit then: (1) It absorbs energy (2) It emits radiation (3) Its energy remains constant (4 )It gains kinetic energy Ans:

Example on crystal field splitting in octahedral complexes, Q. Example on C...

Q. Example on Crystal field splitting in octahedral complexes? Here four ligands lie in one plane and the other two in a plane perpendicular to the first plane. Six ligands are

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd