AP Chemistry Thou Shalt Not Forget

Front

What does a large K_eq indicate about the equilibrium of a reaction?

Back

A large K_eq means that there are more products at equilibrium.

Front

What is the equilibrium constant expression (K_eq) for a reaction?

Back

Front

Are Group 1 cations, NH4+, and NO3- salts always soluble in water?

Back

True, these ions are usually the spectator ions in a chemical reaction.

Front

What happens if Q > Ksp in a solution?

Back

A precipitate forms.

Front

What is the relationship between molecular symmetry and polarity?

Back

Asymmetrical molecules have dipoles that do not cancel, making them polar; symmetrical molecules have dipoles that cancel, making them nonpolar.

Front

Define the term 'spectator ions'.

Back

Spectator ions are ions that do not participate in the actual chemical reaction and remain unchanged.

Front

What is the significance of the solubility product constant (Ksp)?

Back

Ksp indicates the extent to which a compound can dissolve in water; higher Ksp values indicate greater solubility.

Front

What is the difference between a strong acid and a weak acid?

Back

Strong acids completely dissociate in solution, while weak acids only partially dissociate.

Front

What is Le Chatelier's principle?

Back

Le Chatelier's principle states that if a system at equilibrium is disturbed, the system will shift in a direction that counteracts the disturbance.

Front

What is the formula for calculating pH?

Back

pH = -log[H^+], where [H^+] is the concentration of hydrogen ions.