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Unit 8: Chemical Reactions and Equations
Guiding Questions:
- How do batteries work?
- How do you read chemical equations?
- Can you write chemical equations for everything?
What you should learn:
Unit outline
- In chemical change atoms are rearranged but no atoms are created and none are destroyed
- Chemical equations are symbolic representations of what is happening at the molecular level and are used to communicate the conditions under which a reaction proceeds, the products and amount of energy that results, and allow for predictions to be made.
More Specifically...:
- Classify those equations that come under the heading of synthesis, decomposition, single replacement, double replacement, neutralization, oxidation/ reduction and combustion
- Identify and name acids and bases
- Use principle of conservation of mass to balance a reaction
- From a written description of a reaction write a balanced reaction using correct state symbols
- Show that the conservation of mass is true for a balanced reaction
- Predict the products of chemical reactions (including state symbols) when given the reactants.
- Use an activity series to predict the spontaneity of reactions.
- Use solubility rules to predict the formation of a precipitate
- Define oxidation and reduction, and identify any species undergoing oxidation or reduction, and identify the oxidizing and reducing agents
- Write half reactions for single replacement reactions (monoatomic ions only)
Lecture Notes:
Assignments:
Labs:
- Reactions of Acids
- Precipitation Reactions
- Extraction of Salt Peter from Soil
- Activity Series pg. 301
- Observing Redox reactions pg 635
Experiments you could try at home
- Preventing oxidation of apples (10 on pg 956)
- Cleaning (Sliver) by Redox (pg 638) **This really works and is much easier than scrubbing tarnished silver. To modify for home, instead of wrapping silver in aluminum foil, place silver piece in aluminum pan, cover with baking soda and pour boiling water over it until submerged.
Resources:
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