Transcript
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.