A suspension is cloudy or will not allow light through, a solution is clear even though it can be colored. One way to test is to shine a light through the water mixture and see if it allows light to come through without breaking it up or dimming it. If it does it's a solution, if not its a suspension.
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By adding iron fillings into sulphuric acid and then heating
Animal Fat and lye for hard soaps and potash for soft soaps are the base ingredients of soap. Different types and brands of soaps each add their own combination of other ingredients for cosmetic properties, odor, and color. See the link below for the 'Chemistry of Soap'.
When a salt like copper sulfate in placed in water, the ionic bonds are broken and the ions (copper cation and sulfate anion) separate and become hydrated by the water molecules. This is the case of dissolution or dissolving. In the case of copper(II) sulfate, for example, CuSO4(s) + H2O(l) ==> Cu^2+(aq) + SO4^2-(aq)