Identifying Unknown Ionic Salts From Zinc Nitrate

The hypothesis is correct. Potassium chloride mixed with silver nitrate creates a white precipitate. Barium

The measuring cylinder was then used to accurately measure out 20 mL of water, which was then poured into the test tube that would be used for the experiment. The test tube was then placed into the clamp, which was then adjusted in order to make sure that the test tube was grasped firmly and would not fall out.

In reference to the analysis of anions, Table 1 shows that a precipitate was formed when our unknown was combined with HNO3 and AgNO3, thus indicating the presence of a chloride ion. Because our unknown did not form a precipitate due to HCl and BaCl2, separate, effervesce, or smell, we concluded that neither sulfate, nitrate, carbonate nor

* By using the dropper and measuring cylinder, an amount of 5ml milk was placed in the test tube

Now, take the vial and place it into a laboratory drying oven. Leave it here for at least one hour to get the most accurate of results. After it is heated, place the vial into a desiccator to help bring it back down to room temperature. Finally, records its mass one last time. Keep placing the vial into the desiccator until the mass of the crystals and vile stops

10. Ba (NO3)2, barium nitrate produces pale precipitate when put in reaction with sulfuric acid.

This paper describes the methods used in the identification, investigation of properties, and synthesis of an unknown compound. The compound was identified as calcium nitrate by a variety of tests. When the compound was received, it was already known to be one of twelve possible ionic compounds. The flame test identified the presence of the calcium anion in the compound. The compound tested positive for the nitrate cation using the iron sulfate test. At this point it was hypothesized that the compound was calcium nitrate. Reactivity tests and quantitative analysis comparing the unknown compound with calcium nitrate supported this hypothesis. Synthesis reactions were then carried out and analyzed.

On your own: Continue to practice identifying minerals. (There are 26 samples in the Gizmo – A through Z.) Record your findings in your notebook or on separate sheets of paper.

1.) Measure out 20ml out of the water and place it into a glass beaker

4.Measure 35mL of warm water and add them into each of the 4 test tubes at about roughly the same time. It is essential that the water is warm. Do not seal the test tube.

- Get 5 50mL beakers and fill the first one with 30 mL of water

First, we filled the beaker with 500 ML of water then dropped 10 drops of the indicator in the beaker. Then we dropped 10 drops of vinegar in the beaker until it turned red. Once this was done we took crushed up Tums and a little bit of water in it mixed

1 ml of water should be added to the first test tube and make a note. In the second test tube, 1 ml of methyl alcohol should be added. In the third test tube, 1 ml of hexane must be added. Lastly, the fourth test tube will be a control.

I almost mistook the sodium nitrate for salt because they also have similar chemical and physical traits - they are both solid, white, clear, soluble in water, and dissolves in acid. However the sodium nitrate has crystal shape which is granular, and that is different from salt's crystal form, which is cubic. That is how I confirmed that sample C was sodium nitrate. Sample D was identified as sodium thiosulphate because of a chemical property – its reaction to acid. When the two drops of hydrochloric acid was added, the sodium nitrate turned cloudy and yellow, which is a distinct trait of sodium thiosulphate.

2. Add about 20 mL of distilled water and stir the mixture with a glass stirring rod to dissolve the sample. There may be a small amount of insoluble residue. If your sample does not dissolve completely, remove the insoluble material by filtration.