In the first reaction, magnesium was burned to produce magnesium oxide. The reaction produced a bright light, which is evidence of a chemical change. The second reaction occurred as a result of solid magnesium reacting with hydrochloric acid. The reaction produced heat and bubbles, both indications of a chemical change. A wood splint was used to determine that the gas produced was hydrogen gas, hence the other product is magnesium dichloride. In the third reaction, ammonium carbonate was heated to decompose into two gases, due to the absence of anything solid or liquid following the reaction. A wood splint was used to determine that carbon dioxide was present, since the lit splint was extinguished when put in the test tube. Therefore, the other product is ammonium oxide. The fourth reaction occurred between calcium carbonate and hydrochloric acid. When mixed, the two reactants produced a clear aqueous solution, calcium chloride, water, and a gas. The gas was concluded to be carbon dioxide, since the wood splint was extinguished after it was exposed to the gas in the test tube. In the fifth reaction, the two reactants, copper(II) chloride and zinc produced a permanent color change in the solid substance in the aqueous solution. The remaining solid appeared to be black reddish and concluded to be copper, where the aqueous solution is zinc chloride. The six reaction resulted in the formation of a precipitate in an aqueous solution. Copper(II) chloride reacted with sodium phosphate to produce a fluffy blue solid, copper(II)…
