Redox Review

For today's class we did the exercise from page 29 on Balancing Redox Equations for Reactions Run in Acidic Conditions, letters c and d.

We learned that there are general steps:
- Write out which ones are oxidized and reduced and how many electrons are gained and lost.
- Balance out the elements other than the H and O.
- Balance the oxygen atoms by adding H2O molecules where needed.
- Balance hydrogen atoms by adding H+ ions where needed.
- Balance the charge by adding electrons, e-.
- Multiply one or both the half-reactions by a number that will equal both gained and lost electrons. (This is when the number of electrons lost in oxidation is not equal to the number of electrons gained in reduction.)
- Add the two reactions. Cancel electrons and cancel the same formulas found on opposite sides.
- Lastly, make sure that the charges and atoms balance out on both sides.

We also did the exercise on page 32 about Balancing Redox equations Run in Basic Conditions Using Half-reaction Technique.

We learn that there are also steps for these:
-First, do the same steps provided from above. Afterwards, proceed to the following steps given below.
-Add enough Hydroxide ions(OH-) to cancel the H+ ions. (Make sure its still balanced.)
-Combine H+ ions and OH- ions to form water then combine H2O (water molecules).
-Make sure its balanced :)

We also did the chapter 20 study guide sheet about Oxidation and Reaction.
**Btw, we have a test tomorrow on redox reactions. OMG :)

>> Next scribe is Janine Dolor.