Bases
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
A base is a substance that decreases the concentration of hydrogen ions in a solution, raising its pH.
Show
Adding baking soda to water lowers the free hydrogen ion concentration in the mixture and raises its pH above 7.
Watch for
Students often assume a base must contain hydroxide or taste bitter; a base only needs to lower hydrogen ion concentration, not add hydroxide directly.