Tiêu đề Copy of GENERAL CHEMISTRY MIDTERMS ✅

● Lacks a set of formula and definite melting and boiling point. - Solution special type of mixture in which a substance is dissolved in another. {molecular size} - Suspension mixes substances, but overtime they separate. {larger than 10,000 angstorm} - Colloids somewhere between a solution and a suspension. The particles are between the sizes of these other two mixtures and the mixtures does not separate. {10000 angstorm} Homogeneous Mixture the components mixed are uniformly distributed throughout the mixture. ● They are uniform throughout. ● We can only olaserve one phase of matter. ● Key points: Particles are distributed uniformly. We can't judge a homogeneous mixture by seeing it. Homogeneous mixtures are alvo called solution Example: rainwater, vinegar, etc. Heterogeneous Mixture all the components are completely mixed and all the particles can be seen under a microscope. ● We can easily identify the components and more than one phase can be seen by the naked eye. ● Key points Particles are distributed non-uniformly we can judge a heterogeneous mixture by seeing it. Non-uniform composition Example: seawater, pizza, etc. LABORATORY APPARATUS: refers to the various tools, equipment, and instruments used in scientific laboratories to carry out experiments and research. ● 1. Beaker holds solid and liquid that will not release gases when reacted or unlikely to splatter if stirred or heated. ● 2. Test tube stores small amount of chemicals and it holds liquid, heat liquid, etc. ● 3. Distilling Flask to separates mixtures of two liquids with different boiling points ● 4. Erlenmeyer Flask used for storing and mixing various solutions and samples. For cooling, heating, filtration, and incubating liquids to use for liquids that release houses. ● 5. Pipette transports a measured volume of liquid. ● 6. Graduated Cylinder measure volume of liquids. Storage of chemicals ● 7. Test tube holder hold test tubes securely while they are being filled, stirred, or heated. ● 8. Iron Stand to support the other equipment during the experiment. Used when performing reactions that require heating. ● 9. Watch Glass to cover beakers, flasks, and other vessels. Used to hold small amount of solid. ● 10. Crucible tong to lift crucible from a furnace or for other items which cannot be handled with bare hands. ● 11. Thermometer to measure the temperature. ● 12. Test tube rack to hold upright multiple test tubes at the same time. ● 13. Triple Beam Balance used to accurately measure mass to high