Before coming to lab outline here the steps you plan to use the analyze your fiv

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Before coming to lab outline here the steps you plan to use the analyze your five solutions.(essentially come up using the directions I posted to come up with a series of directions step by step on how to find out the unknown solutions)

FIVE SOLUTION ANALYSIS learn to Wnte edced een far odine Sweeping t sweeping est en(1 for fedne OBJECTIVE To determine the specific unknowns present in five different unknown solutions: an acid, a base, a chloride salt, a nitrate salt, and a sodium salt INTRODUCTION In this experiment, each student will be provided with five test tubes, each containing a solution of an unknown compound. Each tube will be labeled only with an unknown number. Each tube will contain only one compound. Each student will be given one unknown from each of the five categories below (although you will not know which is which). an acid, either HCI, HNO, or H,SO, a base, either NaOH, NH, or Na,S a chloride saltcNi r Cac a chloride salt, either NaCi, BaCl, or CuCl, tedio cheek celor oP unKnenn a nitrate salt, either AgNO, Cu(NO), or Fe(NO), widh Ien wn a sodium salt, either Nal, Na,SO, or Na,CO, Before coming to lab, outline your analysis procedure on the supplied page in the lab manual. This should include the specific procedure for each test, information about the appearance of a positive test, and a general order for the tests. You may use any regeants present in the lab. You will not be allowed to disrupt the work of another student to compensate for a lack of preparation on your part. CAREFUL PLANNING CAN GREATLY SIMPLIFY THE PROCESS OF IDENTIFYING YOUR UNKNOWNS YOU HAVE ONLY ONE LAB PERIOD TO COMPLETE THIS EXPERIMENT.

Explanation / Answer

Well, in this case, the object of this experiment is basically to identify which solution is an acid, a base, a chloride salt, sodium and nitrate salts. So, you need to plan specic test for every one of them,

In the case of acid or base, you may use a pH paper. Since the experiment said that there are 5 solution, we can assume that these solutions are aqueous solution, so, Use a pH paper and measure the pH for all the solutions. According to the experiment you have strong acids and strong bases, so a High value of pH (from 11 to 14) means that you have a basic solution, and a low value of pH (from 0 to 2) means you have an acidic solution.

For the case of the sodium ion test, the basic test and the most commonly test to identify the presence of metals ions in a solution is the flame test. For this test use a platinum wire, and clean it with the flame several times to assure it's cleanness. Then, wet the wire edge with one of the solutions. A yellow coloured flame indicates the presence of the sodium ions. To clean once again the wire, just pass it through the flame several times and then, use the test with other solution.

For the case of the Nitrate, you may use this test, known as the brown ring test; this is perfomed adding some Iron sulfate (FeSO4) to a solution of nitrate and then add some Sulfuric acid (It has to be concentrated). You will see that the acid form a layer in the aqueous solution (You'll see two layers). If you see a brown ring forming between the junction of both layers, it's a positive test for the presence of nitrates in the solution.

Finally for Chloride salts, you may use a silver nitrate solution. After you acidified the solution by adding some dilute nitric acid, you'll see that it's occuring a double displacement reaction, which will form silver nitrate. Later, you will see a white precipitate that indicates the presence of Chloride ion

Silver nitrate solution is then added to give a white precipitate for the chloride ion, remember that other halides will also show precipitae with this test so Br- shows a very pale cream precipitate and I- shows a very pale yellow precipitate.

Hope this helps.

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