Embedded Files
Stoichiometry Foundations Group Collaboration
Use the linked slide show to gain more practice with using conversions in the stoichiometric process. Feel free to utilize the linked key to check your setups and progress with this skill.
Slides: Group Collaboration Activity (KEY)
Why Do We Care About Sig-Figs?
Sig-Figs is the method for scientists to report their measurements and calculations with the most certainty allowed by the measuring tool they used to obtain their data with. The resources below will help you better understand what numeric values really matter in a scientific measurement and what values are just place holders.
Resource 1: Significant Digits and Measurement (KEY)
Resource 2: Significant Zeros (KEY)
Silly Video on Sig-Figs and Conversions
Isotopes
This topic relates to your packet pages 12-15. Below are different resources to help you review the concept of isotopes from your previous chemistry class. Remember isotopes are variations of the same type of atom. In other words, they are two or more atoms that have the same number of protons, but have a different mass (which is caused by having a different number of neutrons). This mass difference is the characteristic science uses to separate a sample of an element into its different isotopes using a mass spectrometer. Also, these different masses cause the average mass (on the periodic table) to not have a whole number. Take a look at these videos.
Video 1: Symbol Notation and Particles
Video 2: How a Mass Spec. Works
How To Calculate Average Atomic Mass
A Look Back at the Periodic Table:
In your first chemistry class you learned that all the different trends on the periodic table are a result of the way the different atoms are structured (a.k.a. structure-function relationships). Specifically, there are two structural components that manipulate all the different trends. They are... Nuclear Charge and the Shielding Effect. Your goal will be to explain how these two structural characteristics manage the different trends embeded on the periodic talbe (like atomic radius, ionization energy, electronegativity, etc.) Besides the resources I have provided you on our "Today's Plan" slide in class, here is another resource to help you review previous ideas learned about the periodic table.
Video on Electron Configurations
Types of Bonds and Their Properties:
The resources below are meant to aid you in your review of Polar Covalent, Non-Polar Covalent, Ionic and Metallic Bonds. You will need to remember how the structure of the compound and molecule gives rise to the chemicals solubility in water, its conductivity and its relative melting point (Remember the Whats Going On Here Lab from your first Chemistry class?).
Resource: Types of Bonds (Reviews the different types of bonding)
Animation of How Water Dissolves Salt
Solubilty of Covalent vs. Ionic
Intermolecular Forces:
The following resources will remind you how to identify the different types of attractive forces that can occur between molecules. These are the forces responsible for solubility, melting and boiling points, and vapor pressures. The stronger the force the harder it is to separate the particles which means the boiling/melting points will rise (due to the increase in energy needed to break the attractive force) and the less likely the material will dissolve in water. Later, we will look at the effect on a materials vapor pressure.
ChemTour: IMF Animation & Tutorial
Intermolecular Forces Video
Closer Look at London Dispersion Forces
Reviewing Lewis Dot Diagrams:
Need a quick review on how to draw Lewis Dot Diagrams? THe videos embeded below will do just that. The first shows 5 easy steps to creating a dot diagram while the second one offers some practice and works you through the 5 steps.
Drawing Lewis Dot Diagrams in 5 Steps
Some Extra Practice with Dot Diagrams
Naming and Writing Formulas for Ionic Compounds:
Ionic naming and formula writing can be difficult. These are the names that may or may not require a Roman numeral, they can have polyatomics, and you need to make sure the ionic charges of the ions cancel when writing their formulas. The videos below are a good review of how to tackle these intricacies.
Writing Formulas
Transitional Metals and Naming
Phase Change Diagrams:
Time to investigate the effects of changing both pressure and temperature have on a substances state of matter. Use the resources below to investigate phase change diagrams.
Phase Change Diagram Tutorial (Select the Phase Diagrams from the list)
What a Triple Point Looks Like
Gases & Their Variable Relationships:
The embeded pHet below will enable you to get a particle view on how Volume, Pressure, Temperature and Amount changes affect one another in the IDEAL gas phase. Under the "Energy" portion of the simulation, Maxwell-Boltzmann graphs are incorporated into the simulation. Pay attention to what happens to the graph when you heat up or cool down a gas sample & how different gases of varying masses can be identified using a Maxwell-Boltzmann Graph.
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