8.4 Strength of Acids and Bases

The pH scale ranges from _____ to _____

0-14

Indicates the pH of a neutral solution

7

Is the following sentence true or false? A strong acid always has a lower pH than a weak acid.

False

Is the following sentence true or false? Strong acids and bases are weak electrolytes because they dissociate or ionize almost completely in water.

False

Is the following sentence true or false? The higher the pH value of a solution, the greater the H2O+ ion concentration is.

False

Identify a strong acid

HCI

What is the name of the number scale chemists use to describe the concentration of hydronium ions in a solution?

PH Scale

Describe the difference between concentration and strength

The amount of salute dissolved in a given amount of solution. refers to the solute's tendency to form ions in water.

Is the following sentence true or false? A weak acid has a higher pH than a strong acid of the same concentration

True

Is acetic acid an example of a weak electrolyte? Explain

Yes, because it only partially ionizes

solution that is resistant to large changes in pH

buffer

A substance that ionizes or dissociates into ions when dissolved in water

electrolyte

Water is neutral because it contains small but equal concentrations of ______ and _______

hydronium, hydroxide

If you add acid to pure water, the concentration of H3O+ ______ and the concentration of OH _______

increases; decreases

What happens when weak acids and bases dissolve in water

ionize and dissolve slightely

When dissolved in water, sodium hydroxide almost completely dissociates into _____ and ______ ions

sodium; hydroxide

What happens when strong acids and bases dissolve in water

they ionize almost completely; dissociate almost completely