Lecture 19.2- pH

BELLWORK- Label pairs ,[object Object],[object Object],[object Object],[object Object],[object Object]

The pH scale measures the hydrogen ion concentration[H + ] of a solution.

[object Object],[object Object],[object Object],The pH scale ranges from below zero (very acidic) to above14 (very basic)

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Calculate pH pH = -log [H + ] ,[object Object],[object Object]

Calculate pH pH = -log [H + ] ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Calculate [H + ] given pH pH = 7.0 pH= 8.5

Calculate [H + ] given pH pH = 7.0 [H + ]= 1x10 -7 pH= 8.5

Calculate [H + ] given pH pH = 7.0 [H + ]= 1x10 -7 pH= 8.5 [H + ]= 3.2x10 -9

Calculate [H + ] given pH ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

From pH0 to pH14 the H + concentration decreases 100,000,000,000,000 times!!

Relationship between [H + ] and [OH - ] ,[object Object],[object Object]

Relationship between [H + ] and [OH - ] ,[object Object],[object Object],[object Object],[object Object],[object Object]

Relationship between [H + ] and [OH - ] [H 3 O + ][OH - ] = 1.0 x 10 -14 ,[object Object],[object Object]

Acidic = more H+ Basic = more OH -

[object Object],[object Object],[object Object],Relationship between pH and pOH

pH pOH [H + ] [OH - ] pH + pOH = 14 [H + ][OH - ]=1x10 -14 pH = -log[H + ] pOH = -log[OH - ]

pH pOH [H + ] [OH - ] pH + pOH = 14 [H + ][OH - ]=1x10 -14 [H + ] = 10 -pH [OH - ]= 10 -pOH

Calculate pH  pOH ,[object Object],[object Object],[object Object],[object Object],[object Object]

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