Wednesday, November 9, 2011

Exam Review Question!!

Question: What is the difference between a solution and a heterogeneous mixture? A pure substance and a mixture? A solution and compound? Give examples of each. Overall give 5 examples of heterogeneous mixtures and 5 examples of homogeneous mixtures?

             There are many ways to distinguish between mixtures of elements, including homogeneous, heterogeneous, solutions etc. A heterogeneous mixture is a mixture whose composition is not uniform throughout. A solution, also known as a homogeneous mixture, is a mixture where the composition is uniform; either all solid, all liquid or all gaseous. An example of a heterogeneous mixture is Campbell's chicken noodle soup and an example of a solution is gasoline. The difference between a pure substance and a mixture is that a pure substance has a fixed composition and a mixture's composition varies depending on the product. An example of a pure substance would be something like a bar of soap and a mixture would be milk. Milk can have different amounts of calcium and fat while soap usually will have the same amount of all its ingredients. A solution is different than a compound in that a solution can only be homogeneous while a compound can only be heterogeneous because they are substances. A solution would be water while a compound could be something like gushers, a blueberry bagel, or body wash with moisture beads. A compound could be anything from salt to cotton.