What are all the properties of mixtures?

I can't help out with specific questions, but I would start with the following: All substances can be classified as elements, compounds, homogenous mixtures and heterogenous mixtures. Elements are all listed on the periodic table. Each cannot be broken down into other elements, and all of them are completely pure, i.e. Aluminium only contains Aluminium atoms, nothing else. Compounds contain two or more elements combined in a *fixed* ratio. For example, carbon dioxide will only ever contain carbon and oxygen in a 2:1 ratio. Homogenous mixtures contain more than one compound, but the properties of that mixture will be uniform, i.e. there will be the same density all the way through. Think of salt water, lemonade, gasoline. All of these are homogenous mixtures. Heterogenous mixtures differ from homogenous mixtures in that the properties are not the same all through the substance. Concrete, for example, may have bits of gravel, rebar, etc all the way through. A heterogenous mixture can ...  more