Sample A contains 2 chemicals from the list below , and sample B three. How to I

Question

Sample A contains 2 chemicals from the list below , and sample B three. How to I dentify them?

A) Chemical fromulas:

NaI MgCl2 CaCl2 Al2O3

K2SO4 NaCl KCl MgCO3

KI Na2So4 Na2CO3 CASO4

CaCO3 Al2(SO4)3 MgSO4 K2CO3

B) Here are the chemicals availble to help me to find out:

-Solid samples of each of the sixteen chemicals listed in the investigation report in labeled bottles.

-Phenopthalein and aluminon indicators (small dropper bottles).

-250 mL bottles of a 6 M and 1 M acids HCl(aq), H2SO4(aq), and CH3COOH(aq).

-250 mL bottles of a 6 M and 1 M bases NaOH(aq) and NH3(aq).

-250 mL bottles of 6 M and 1 M solutions of AgNO3(aq) and BaCl2(aq).

-250 mL bottle of 0.5 M solution of Na2SO4 (aq).

-250 mL bottle of 0.1 M solution of Na3Co(NO2)6 (aq).

-250 mL bottle of saturated CaO (aq).

-250 mL bottle of ethanol, CH3CH2OH (l)

C) Extra equipements available.

- 1 conductivity meter (light buble test apparatus)

- two pH meters

-Filter paper

-Centrifuges.

-CRC Handbook and Merck Index.

I started doing some research, but I am still confused on how to (step by step) indentify the two chemicals in the unknow sample A, and identify the third chemical contained in the unknown sample B containing the two previous ones from A and another one.

Be very clear and explain the different methods to find the chemicals separatly..

Thank you for your help.

Explanation / Answer

The different methods to identify the chemicals in the sample are as follows:

1. The identification of acids or bases present in the solution is don by using litmus paper.Drip each of your samples onto strips of litmus paper and watch for the change color if turn red then label that it contains acid such as HCl and H2SO4,

2. If acids and bases got separated then mix small amounts of your KOH solution with samples of the remaining (neutral) chemicals. If tubes produce a stringy, brown precipitate of silver oxide then Label the silver nitrate and the identification of AgNO3.

3. Another tube should release the characteristic odor of ammonia, due to the acid-base reaction of KOH and NH4Cl to produce gaseous ammonia (NH3). Label this one too.

4. Take one of your acids and mix it with each of the remaining samples. A fizzing (from the Na2CO3) and a

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