Unit 4 Lecture Notes

Flashcards about Reaction Patterns, Compound Types, and Chemical Equations

• (Plus Sign)

Used to separate multiple reactants or products in a chemical equation.

Yield Sign (→)

Separates reactants from products in a chemical equation.

Reversible Reaction Symbol (⇌)

Signifies a reaction that reaches equilibrium; replaces the yield sign.

Catalyst (Pt)

A substance that speeds up a reaction but is not consumed; formula written above the arrow.

Triangle (Δ)

Indicates that heat is being applied to the reaction.

(s)

Indicates the reactant or product is in a solid state.

(l)

Indicates the reactant or product is in a liquid state.

(g)

Indicates the reactant or product is in a gaseous state.

(aq)

Indicates the reactant or product is in an aqueous solution (dissolved in water).

Ionic Compounds

Compounds existing as crystalline solids at room temperature, having high melting points, and conducting electricity when dissolved in water.

Covalent Compounds

Compounds existing as liquids, gases, or solids at room temperature, having low melting points, and not usually conducting electricity.