SKILL BUILDER, page 74. COMPARING AND CONTRASTING

COMPARING

CONTRASTING

The mixtures studied are homogeneous, except for cloudy ice cubes with a heterogeneous appearance because the outside of the cube is the first to freeze, and the interior of the water to find its liquid state. In alloys, carbonated-beverage and lasers are not distinguished phases, so they can be considered homogeneous.

The mixtures analyzed are of different composition in the state in which they are, the helium-neon laser is a gaseous mixture, because the elements are in this state. Alloys are solid mixtures (copper-tin), their appearance is totally homogeneous. Ice cubes are liquid-solid mixtures, due to the presence of small particles (corresponding to minerals) found in water. Ginger ale is a carbonated-beverage, so it has a gaseous part and a drink, usually the gas is dissolved in the liquid part, when the solution is in contact with the environment, ie the bottle, the gas escapes from the liquid.