Continuing Equilibrium

Tuesday the 18th

By Hayden Northwick

We begun class by showing Mrs. Friedmann our graph, which was homework from the night before.  Then she handed back some graded work of ours including the latest typed up lab we did and also the packet we did at the beginning of the equilibrium unit when she wasn't there.  We spent the majority of the class time going over the packet. The key can be found in moodle or at this link.  

The only homework we have tonight is to do the 1st of the 3 worksheets we collected in class today for tomorrow.  

In the last 30 seconds of class, Mrs. Friedmann did a quick demo where she poured a liquid on the counter in a shamrock shape and lit it on fire.  It burned with a green tint. Happy belated St. Paddy's day.

The next blogger will be: Serene P.

Notes on Notes

Happy Tuesday Everyone!

Today, we took the allll the notes we neglected to take on Friday or Monday. The topics were collision theory, reaction mechanisms, reaction rate and factors affecting reaction rate. I give a short summary of each of them below, but you can find the real notes at http://GBS-Moodle.glenbrook225.org/moodle/mod/resource/view.php?id=86333

Collision Theory

When a reaction takes place, it is because molecules collide with each other at 1) the right speed and 2) the right orientation. The "activated complex" is this transition stage between reactants and products during a reaction. The "right speed" is otherwise none as the activation energy.

Reaction Mechanisms

A reaction does not happen all in one go; a series of steps makes a reaction happen. The "crash" happens, and then the old bonds break to form new bonds. The overall reaction, called the complex reaction, given on paper is just the end result, and many elementary or intermediate steps are taken to get there. 

Reaction Rate

This is a measure of how quickly the reactants in a reaction become products, or how much reactant is used over time. We will calculate this in units of molarity (mol/liter) per any unit of time (seconds, minutes, etc). The elementary steps of the reaction all have different required activation energies, and the step with the highest activation energy will take the longest to complete. This is called the rate-determining step, because it will be the factor that affects the speed of the reaction.

Factors Affecting Reaction Rate

Factors include: an increase in temperature, an increase in concentration (molarity), an increase in surface area, and the addition of a catalyst. A catalyst lowers the activation energy of certain slow elementary steps and can also provide different paths for a reaction to take, making it go faster.

Homework:

Check the answers to the equilibrium packet assigned yesterday (http://GBS-Moodle.glenbrook225.org/moodle/mod/resource/view.php?id=86334)

2 WebAssigns are due on Wednesday by 11:59 pm 

Equilibrium

Equilibrium and Sub Day!

Although Ms. Friedmann was not here today to show off her amazing teaching skills, we had a "sub" in class to "substitute" for her. For the whole class period, we worked on an interesting equilibrium packet.

Homework:

• Finish the Equilibrium packet for tomorrow
• Start working on the 3 WebAssigns that are all due Wednesday