test tube holder and heat gently with a cool flame and record any changes. Classify your observation as a physical changeor a chemical change2. Reactions of Solutions .
(a) Add 20 drops of sodium carbonate, and 20 drops of sodium sulfate into separate test tubes. Add 20 drops of dilute hydrochloric acid to each test tube and record any changes. Classify your observation as a physical changeor chemical change(b) Add 20 drops of calcium nitrate, and 20 drops of coper (II) nitrate into separate test tubes. Add 20 drops of dilute ammonium hydroxide to each test tube and note any changes. Classify your observation as a physical changeor chemical change . . Data Table / Results B. Observation of Elements Element Symbol Physical Characteristics Metal/Semi/Nonmetal Cobalt Co Ferromagnetic, hard, brittle Semi Hydrogen H Nonmetallic, odorless, tasteless, colorless Nonmetal Magnesium Mg Light in weight and strong Metal Manganese Mn Very brittle, easily oxidized Metal Neon Ne Odorless, tasteless, lowest liquid range Nonmetal Oxygen O Odoreless,tasteless, colorless Nonmetal Silicon Si Solid, soluble, hard Semi Sulfur S Nonmetallic, solid, odorless, tasteless Nonmetal Tin Sn Soft, pliable, silvery- white metal Metal Zinc Zn Bluish/white, lustrous, diamagnetic Metal C. Physical Properties 1. Boiling Point Bp of methyl alcohol 43.4 C
Bp of Unknown 50.2 2. Solubility of a Solid in Water Copper sulfate crystal and water insoluble Calcium carbonate crystal and water soluble 3. Solubility of Liquid in Water Methyl alcohol (methanol) and water soluble Amyl alcohol (pentanol) and water insoluble D. Chemical Properties Procedure Observation Physical or Chemical Change 1. Reactions of Compounds (a) Ammonium bicarbonate + heat released gas/odor chemical change (b)Potassium bicarbonate +heat strong odor chemical change 2. Reactions of Solutions (a) Sodium carbonate + fizzing and bubbles chemical change hydrochloric acid fuzzy liquid Sodium sulfate + hydrochloric acid clear liquid physical change (b) Calcium nitrate + remained clear physical change ammonium hydroxide Copper (II) nitrate + turned a light green chemical change ammonium hydroxide color Discussion When observing the elements magnesium, silicon, sulfur, tin, and zinc, a periodic table was used to classify them under their categories accordingly. The majority of the elements had a silver/ charcoal color, except for sulfur, which was a yellow color. The boiling point of methyl alcohol was found by boiling a beaker of water and submerging a test tube with alcohol in it until it boiled. Observations of the boiling point had to be taken quickly since it was such a minute amount of alcohol that was placed. Copper sulfate did not dissolve in the water, regardless of the time the tube was mixed, therefore it was classified as insoluble. Calcium
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