THIS IS A FINAL EXAM! PLEASE DO NOT ANSWER UNLESS YOU ARE 100% SURE. PLEASE SHOW

Question

THIS IS A FINAL EXAM! PLEASE DO NOT ANSWER UNLESS YOU ARE 100% SURE. PLEASE SHOW WORK IF NECESSARY

Part 4: Questions

A. You need to analyze whether a particular reaction is producing hydrogen gas. Describe how you will do it? Details are neccessary.

B. A reaction is occurring and produces a precipitate. You beieve that the precipitate produced contains carbonate (CO32-). Describe a test you can use to find out if the precipitate is made up of the carbonate anion?

C. Melting point determination can be used for several purposes. What are those purposes?

Explanation / Answer

A) If you have to analyze whether in your reaction hydrogen is produced or not ,you can analyze it by pop-up test..

In this test lighted splint is used for the test of hydrogen gas.hydrogen gas burns with a 'pop' sound and extinguishes the lighted splint.

B) Take your test solution in test tube and add few drops of HCl in it.CO2 gas will release if your test solution contains carbonate ions.pass this CO2 gas in lime water lime water turns milky.

C) 1.Melting point is one of the technique which is used to identify the compound.

2.It differentiate between impure and pure compound.

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