Acids, Bases, and Buffers Flashcards
Created using notes from Week 2 of class.
Acidity is measured on a scale from:
1-14
True or False: The lower the pH, the higher the concentration of hydronium ions.
True.
Which two ions are produced when pure water breaks down?
Hydroxide ions and hydronium ions.
Hydroxide ions form when a water molecule gives up a hydrogen ion. Hydronium ions form when another water molecule accepts the hydrogen ion.
Acidity is the concentration of. . .
Hydronium ions in a solution.
What is the point of neutrality on the pH scale?
7.0
Otherwise known as the concentration of hydronium ions in pure water.
What is the synonym for basic?
Alkaline.
As hydronium ion concentration decreases, pH. . .
Increases.
Or, the solution becomes more basic.
A solution with a pH lower than 7 is. . .
An acid.
A solution with a pH higher than 7 is. . .
A base.
Or, alkali.
Acid or base: Bleach.
Base.
Bleach rests at 13 on the pH scale.
Acid or base: Sea water.
Base.
Sea water rests at 8 on the pH scale.
Acid or base: Saliva.
Acid.
Saliva rests at a 6 on the pH scale.
Acid or base: Vinegar.
Acid.
Vinegar rests at a 2 on the pH scale.
Buffers are. . .
Solutions that resist change in pH.
Buffers are able to absorb hydrogen and hydroxide ions added to a solution.
What is an enzyme?
A biological catalyst.
A catalyst causes chemical reactions or increases the rate of a reaction.
