Question

(a) show by an activity that homogeneous mixtures can have variable composition.(b) how is it different from hetrogeneous mixtures?

Answer 1

When bronze is made the mixture can have a variable composition, depending on what properties you wanted the alloy to have. Blades were generally made of 90% copper, 10% tin for strength, but helmets and armor were made from 94% copper and 6% tin because it was easy to shape by hammering. If you took two ball point pens that are blue, they probably are composed of different colors and colors particles of different densities. Take a piece of paper toweling and cut 2 strips about 5 inches (12.5 cm) long and 1 inch (2.5 cm) wide. Put a point on each of the strips. Make the points as close to equal as you can. With 2 ball point pens of different makes but the same color mark the pointed ends in a solid color so the point is colored to the same height (about 1/2 inch or 1.25 cm is fine) In a saucer pour so drugstore alcohol up to about 1 cm. You could use a cup but be sure and wash it thoroughly when you are done. Hold the strips in the alcohol until the colors don't separate any more. Make your observations.