pH

• pH scale- measure of H+ ions (acidity); “power of hydrogen”

H + = hydronium ionOH- = hydroxide ion

#10.

pH

• acid- lots of H+ ions– taste sour– feel watery

#11.

pH

• base- lots of OH- ions– taste bitter– feel slippery

#12.

pH

• neutral- equal amounts of H+ and OH- ions– Ex: water

• neutralize- combining an acid and a base to form water

#13.

pH

• buffer- any substance that resists a change in pH– Many life biological reactions have a small pH

range– Example: blood (pH 7.35 – 7.45)

• buffering capacity- the ability to resist a change in pH

#14.

#15.