Identifying Eight Unknowns Using Only Chemical Means
The purpose of this lab is to be able to safely identify 8 unknown substances using only chemical means and our own knowledge of the substances to be able to figure out which substance is which.
The materials that we were allowed to use were 2 spot-plates, test tube brush, distilled water bottle, samples of the unknowns A-H, and paper towels.
A. Health Hazards
Copper II nitrate is harmful if inhaled or swallowed. Exposure to the dust can irate the nose, throat, and eyes.
Nitric Acid is poisonous and a strong oxidizer. It is corrosive and fatal if swallowed or inhaled. It can also cause severe burns to all body tissue.
Distilled Water can mildly irritate the skin, eyes and the throat.
Potassium Iodide may cause irritation to the skin, eyes, and respiratory tract.
Iron III nitrate can be harmful if swallowed or inhaled. It can also cause burns if it comes in contact with the eyes.
Sodium Carbonate can cause eyes burns and is harmful if it swallowed or inhaled. It will also cause irritation to the skin and respiratory tract.
Lead II nitrate causes eye and skin irritation. It is harmful if swallowed and will cause toxic effects. Also it is harmful if it is inhaled.
Sodium hydroxide is corrosive, and very harmful. It may be fatal if it is swallowed or inhaled. It causes burns to the area of contact. It also reacts with water, acids, and other material.
B. Formulas of each unknown
Copper II nitrate- Cu(NO3)2
Nitric Acid- HNO3
Iron III nitrate- Fe(NO3)3
Sodium Carbonate- Na2CO3
Lead II nitrate- Pb(NO3)2
Sodium Hydroxide- NaOH
C. The four ways in which we can use to tell that a chemical reaction has taken place would be if there was a precipitate that formed, a color...