Qualification > Sciences

Chemistry Help needed!:-(

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godfather93:
here's a link through which anyone can learn the anion and cation tests easily.
http://library.thinkquest.org/2923/tests.html

hyebyekadal:
this is whole q!

Pharoah:
 
--- Quote --- 5 A solid compound X was analysed. Solid X was an aluminium salt. The tests on X and
some of the observations are in the following table.
Complete the observations in the table.
(a) One spatula measure of X was
placed into a hard-glass testtube.
The solid was heated
gently then strongly. The gas
was tested with pH indicator
paper. paper went red
--- End quote ---

The salt was probably aluminum carbonate which decomposed on heating to aluminum oxide and carbon dioxide. Carbon dioxide is acidic so the litmus turned red.

hyebyekadal:
o no i thought of that also but the later in the question u find out its nitrate and there NO mention of carbonate thats what i wrote! I said that there were carbonates impurities.. but the only answer the ms provided is hydrated salt!

Pharoah:
Why don't you post the entire question. maybe we could help you better then.

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