Mixtures sorted by state
A mixture can be named twice over: by the states of the two components it was made from, and by whether it came out homogeneous or not. Eight two-component mixtures, named both ways.
| First component | Second component | Nature of the mixture | How the mixture is named |
|---|---|---|---|
| Wheat flour (solid) | Water (liquid) | Heterogeneous | Solid-liquid heterogeneous |
| Salt (solid) | Water (liquid) | Homogeneous | Solid-liquid homogeneous |
| Coconut oil (liquid) | Water (liquid) | Heterogeneous | Liquid-liquid heterogeneous |
| Ethyl alcohol (liquid) | Water (liquid) | Homogeneous | Liquid-liquid homogeneous |
| Sugar (solid) | Salt (solid) | Heterogeneous | Solid-solid heterogeneous |
| Copper (solid) | Zinc (solid) | Homogeneous | Solid-solid homogeneous |
| Carbon dioxide (gas) | Hot water (liquid) | Heterogeneous | Gas-liquid heterogeneous |
| Carbon dioxide (gas) | Cold water (liquid) | Homogeneous | Gas-liquid homogeneous |
The solid-solid homogeneous row
Sugar and salt ground together stay two solids side by side, and you could pick the grains apart. Copper and zinc do not behave like that.
Brass
Brass is a mixed metal, an alloy, made by mixing copper and zinc in the proportion 65% and 35%. It is a solid-solid homogeneous mixture — there is no point in it where the composition differs from any other point.
The last two rows are the same gas
Carbon dioxide in cold water gives a homogeneous mixture, and in hot water it does not. Nothing about the components changed; the temperature did. That is the first hint of something the skill on gases returns to — how much gas a liquid can hold depends on how hot it is.
Two names, not one
Solid-liquid, liquid-liquid, solid-solid and gas-liquid describe what was mixed. Homogeneous and heterogeneous describe what came out. A mixture needs both words to be properly named.