Got it — only names — *2. Solutions* *3. Ionic Equilibria* *5.

When you mix two or more substances, you might form a solution. A solution is a homogeneous mixture, meaning it has a uniform composition throughout. If you took a sample from the top or bottom, it would have the same properties.

The two main parts of a solution are:

• Solute: This is the substance that gets dissolved. It's usually present in a smaller amount.
• Solvent: This is the substance that does the dissolving. It's usually present in a larger amount. Water is often called the "universal solvent" because it can dissolve so many things.

Ionic equilibria are all about reactions that don't go to completion. Instead, they reach a state where the rate of the forward reaction (e.g., dissociation) equals the rate of the reverse reaction (e.g., association). This means that at equilibrium, you'll have a mix of reactants and products present.

Redox is short for reduction-oxidation. These two processes always happen together: if something loses electrons (oxidized), something else must gain those electrons (reduced).

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