Since getting annoyed of this ignorant notion that “chemicals” are bad, I made this post explaining how EVERYTHING is a chemical.
Chemistry
Organic Chemistry
A lot of people thought originally that there were two classes of elements. Organic was associated with living things. People thought things that came with living organisms couldn’t be convernted to non living and vice versa up until the 18th century. People thought there was a vital source associated with them but now we know […]
Chemistry Review for Finals
Firs t of all they’re going to give you information, periodic table, activity series of metals and they will give you solubility rules and formulas (like gas law, density, etc). For the professors part, that’s going to be photocopied as well so you don’t have to memorize formulas and stuff. You have to spend time […]
Acids and Bases
strong/weak bases, conjugate acid-base pairs, toxicity, neutralization reactions and a little bit about titration.
Concentrations, Molarity and Dilution
Concentration refers to the relative amount of solute or either solution or solvent. There’s a number ways to express concentration and one way is molarity. Other ways to express concentration are parts per million. When you hear about pollution or things like that, you’ll hear PPM of lead or whatever is in the air. Another […]
Colligative Properties of Solutions
Colligative Properties of Solutions Depends on concentration of dissolved particles: doesn’t mean if they are small or large or charge molecules, just the number of particles per solution. There are four properties. 1. Vapor Pressure. For the rate of vaporization and condensation, that’s going to depend on surface area. When you want to measure the […]
Solutions and Concentrations
About solutions, dissolving and stuff.
Chemistry: Gases, Liquids, Solids
Solids tend to create a crystalline structure while liquids are free to move around each other but still remain together. Gas molecules are separate from each other. Solids Liquid Gases Density (g/cm3) high high very low (g/L) volume/shape fixed fixed/container indefinite/container Compressibility very low very low high Properties of Gases Low Density Expand to fill […]
Valence electrons, dot structure, electronegativity and VSEPR
If an element has a low # of valence electrons, it tends to give them away while if they have a large # of them, they tend to gain electrons to become stable. For the first 20 elements on the periodic table, we can have up to: 2 electrons in the first shell (1s2), 8 […]
Electrons shells and orbitals
planck-einstein equation, orbitals, aufban principle, shells, e- configuration, orbital diagram, ionization energy