4.1 Explore: Chemical Reactions
- What is the balanced chemical equation(s) for your reaction(s)?
- What is the evidence of a chemical reaction? (Remember, there are three indicators.)
- What observations were made that 'prove' your reaction(s) were actual chemical reactions?
- The reactions were organized into sections. How were the reactions in each section similar? How were they different from the other sections?
- Can you create a unique model for each reaction section? Why or why not?
- Based on your answer to the bullet above (the 5th bullet), can products of reactions be predicted? Why or why not?
- Dissect chemical equations being able to recognize reactants, products, and symbols used
- Define and explain the concepts of solute, solvent, solution, electrolyte and nonelectrolyte
- Be able to write and balance net ionic equations
- Explain spectator ions
4.2a Explore: Solutions
- What is a solution? What are solutes and solvents?
- How did you differentiate between the salt solution, sugar solution, and DI water?
- What is the difference between an electrolyte and a nonelectrolyte?
- Can you create a particle diagram of a sodium chloride solution?
- Can you create a particle diagram of a sugar solution?
4.2c: Net Ionic Equations
Quiz #1: Sections 4.1 & 4.2
- Explain why reactions are predictable
- Determine products from given reactants
- Describe and differentiate the five major types of reactions
- Track electrons in and balance redox reactions
4.3a Metathesis Reactions
As stated in the notes, metathesis means to transpose. In these reactions there is an exchange of cations (like replaces like) with predictable results. The 'predictable' is important as you can now determine products and complete reactions just by knowing the reactants.
4.3b Redox Reactions
Redox (oxidation reduction) reactions are all about following the electrons. Your goal here: recognize when oxidation numbers change from one side of the equation to the other and be able to determine & write out half reactions. There should be more practice balancing these when we get to electrochemistry.
4.3c Other Reactions
Based off the survey of the five reaction types lab (and the reaction type/subtype worksheet in dropbox), you have models and the information to start predicting products (predicting practice with Equation Writing 2 also in dropbox). This will tie right in to the thermite reaction (and review of stoichiometry) tomorrow.
Quiz #2: section 4.3
- Define and calculate molarity and it's role in qualitative descriptions of 'dilute' and 'concentrated'
- Calculate and carry-out dilutions
- Utilize molarity in solving stoichiometry problems
4.4a Solutions & Molarity
- What is molarity?
- How is it calculated?
- What was the concentration of your salt solution? your sugar solution?
- What is a dilution? How do you calculate it? How could you verify your concentration?
- Can molarity be used in stoichiometry? Why or why not?
4.4b Molarity & Titration
Quiz #3: section 4.4
Below find links or videos for a quick review of concepts or practice problems.
Volumetric Analysis: molarity and stoichiometry...the video, created on the iPad is very different in the beginning and I don't know why. So, skip to 1:39 for the second problem.
Half reactions & Balancing Redox reactions