CHEMSTEM
[CHEMSTEM]
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  • Chemistry SOL
  • Unit Notes and Keys
  • Problem Sets
  • DBQ, Data, and Research
  • Study Tips & Outlining
  • Page 1: Introduction to Chemistry
  • Page 2: Atoms, Compounds, and the Mole
  • Page 3: Chemical Reactions, Quantities, and Equations. Stoichiometry. Gases.
  • Page 4: Thermochemistry, Chemical Kinetics, and Chemical Equilibrium.
  • Page 5: The Electromagnetic Spectrum, Quantum Mechanics, and the Electron.
  • Page 6: Periodic Trends, Lewis Structures, Polarity/IMF, and VSEPR Theory
  • Page 7: Solutions, Molarity, & Dilution. Acids & Bases.
  • Page 8: Nuclear Chemistry, Organic Chemistry, Reduction/Oxidation Reactions
  • Page 9: Biochemistry, Environmental Chemistry, Material Science and Engineering
  • Additional Files
  • Oceanography Resources
  • More Chem Resources

+ Unit 1 Notes Videos

Unit 1, Part 1
Unit 1, Part 2
Unit 1, Part 3
Unit 1, Part 4
Unit 1, Part 5 (End)

The Periodic Table

The NEW Periodic Table Song
Parts of the Periodic Table (Metals/Non-metals, Alkali, etc.)
History of the Periodic Table: Dimitri Mendeleev
The Periodic Table (Crash Course)

Introduction to Chemistry

What is chemistry?
Lab Safety (Crash Course)
Types of Matter: Elements, Compounds, and Mixtures (Professor Dave Explains)
Pure Substances vs. Mixtures (Chem Academy)
Physical and Chemical Changes (Bozeman Science)
Converting Between Celsius and Kelvin
The Basics of Chemical Reactions
Density Calculations
Slope of Mass/Volume as Density (Density Graphs)
When mass is on the y-axis, and volume is on the x-axis, then the slope of the line (rise/run, or  Δy/Δx) is the density of the substance because D=M/V

Mathematics and Data

+ Dimensional Analysis Made Easy, Part 1
+ Dimensional Analysis Made Easy, Part 2

Mr. Lee says:

Don't understand dimensional analysis (also called unit conversions)? Tyler DeWitt has many helpful videos on his channel. I won't link them all on CHEMSTEM but be sure to check out his great stuff in order to master this important skill.
Conversions: Dimensional Analysis
Dimensional Analysis with Rates (Rate Conversions)
+ Unit Representations: Fractional and Inverse
Overview: Accuracy, Precision, Measurement, and Significant Figures (Michael Farabaugh)
Accuracy and Precision, Part 1 (Tyler DeWitt)
Accuracy and Precision, Part 2 (Tyler DeWitt)
​
When given data (such as trials), take the AVERAGE to help determine accuracy, and the RANGE to help determine precision. Data is more accurate if the average is closer to the actual (accepted) value. Data is more precise if the range of measurements is smaller. (A good synonym for precision is "consistent".)
Picture
Accuracy vs. Precision (TED-Ed)
Percent Error
+ Percent Error with Non-given Error Value
Overview of Scientific Notation and Dimensional Analysis (Professor Dave Explains)
Intro to Significant Figures (Professor Dave Explains)
Significant Figures Tutorial
     There are multiple videos in the playlist. 
Watch as many as you need or want.
New for Fall 2018:
  1. Accuracy and precision examples with trial data
  2. General percent error examples
  3. Significant figures examples​

Lab Techniques & Procedures for Solutions and Mixtures

Overview of Some Separation Techniques 
Filtration
This technique separates solid from liquid. The paper "catches" the solid, and the liquid solvent goes through the paper and is collected. This is like a coffee filter, where the solid grinds are caught, and the liquid moves through.
Evaporation & Distillation
An example of evaporation is trying to separate dissolved salt (the solute) from the water in which the salt is dissolved (the solvent). If you have a saltwater solution, you can separate the salt and the water by boiling the water. The steam is collected, condensed, and is pure water. (The solute was left behind, though). Distillation occurs when trying to separate a liquid-liquid solution.
Chromatography
Titration
     (Page 7 also contains information on acids, bases, and titration/neutralizations.)
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