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General Chemistry is fun and I learned a lot during finals.docx

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General Chemistry is fun and I learned a lot during finals. First, I learned about the differencesbetween solutions, suspensions, colloids, and pure substances in chemistry.A solution is always transparent, light passes through with no scattering from solute particleswhich are molecule in size. The solution is homogeneous and does not settle out. A solution cannot befiltered but can be separated using the process of distillation. A suspension is cloudy and heterogeneous.The particles are larger than 10,000 Angstroms which allows them to be filtered. If a suspension isallowed to stand the particles will separate out. While a colloid is intermediate between a solution and asuspension. While a suspension will separate out, a colloid will not. Colloids can be distinguished fromsolutions using the Tyndall effect. Light passing through a colloidal dispersion, such as smoky or foggy air,will be reflected by the larger particles and the light beam will be visible and a pure substance is a solid,liquid or gas which molecules which are all identical, or an infinite crystaline polymer in which all unitcells are the same.I have also learnt in the previous class that it is possible to classify substances into groups basedon their physical properties. Substances can also be grouped simply on the basis of whether they aresweet, salty, sour, or bitter to taste.When we squeezed a lemon and tasted the juice without adding water or sugar, It’s extremelysour. So, the reason why substances sour or bitter to taste is because (substances like lemon juice tastesour) of the presence of a chemical called acid in them. In Latin, acere meaning sour. Materialscontaining an acid are called acidic substances.

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Term
Winter
Professor
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