This analysis is carried out based on some of the reagents required for the exam. These reagents are listed below:
Dilute sodium hydroxide
Dilute ammonia solution
Barium chloride solution
Distilled water
Red and blue litmus paper
Phenolphthalein
Methyl orange
One boiling tube
Five test tube
Source of heat
Wash bottle containing distilled water
Filtration apparatus
The salt to analyse is sodium trioxocarbonate IV which will
be tagged C.
The sample analysis question below will be used to show the
picture of how you can identify the ions in sodium trioxocarbonate IV
Question
C is a sample of
an inorganic compound. Carry out the following test on C and identify any gas evolved.
1.
To a portion of sample C, add distilled water and shake
2.
To the mixture from (1), test with litmus paper, add barium chloride solution, and add dilute HCl in excess.
3.
To another solid portion of C, put it into the test tube, add dilute HCl, and bubble any gas
evolved into lime water.
4.
Dip a glass rod or platinum wire into
concentrated HCl then into the sample of C
and heat on a non-luminous flame.
|
s/n |
Test |
Observation |
Inference |
|
1 |
To a portion of C, add distilled water and shake |
Soluble and give a clear solution |
K, Na, NH4 or HCO3 ions are likely present |
|
2 |
To the mixture from (1), add test with litmus paper, barium chloride solution, and dilute HCl in excess. |
Turn red litmus paper blue, form a white precipitate with Barium
chloride soluble in excess dilute hydrochloric acid |
Alkaline, HCO3 ions absent, K, Na likely present, SO3, CO3 likely present |
|
3 |
To another solid portion of C,
put into the test tube, add dilute HCl, and bubble any gas evolved into
lime water. |
Colourless gas, odourless gas which turns lime water milky |
CO2 confirmed |
|
4 |
Dip a glass rod or platinum wire into concentrated HCl then into the
sample of C and heat on a non-luminous
flame. |
Golden yellow flame |
Na ions confirmed |
1 Comments
Don ole your explanation is explicit
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