1. (“It’s pHantastic!”)

3.  pH measures __________________________________  The pH of water is _______________  Draw 2 water molecules and show the hydrogen bond.  Draw a hydronium ion and show its formula.

4.  pH means the _____________ of hydrogen  pH could also be the amount of ______________ or the amount of _________________ inside the water.  The chance of finding a hydronium ion in distilled (pure) water is 1 in ___________________. ◦ Now, write that in decimal form: 0.  Write the equation for pH: pH =  What is the pH of an aqueous solution that has a concentration of 0.00001 hydronium ions?

5.  An acid found in your stomach is _______________.  If we put that acid in water it ___________________ to form _______ions and _______________ ions.  The concentration of hydronium ions for this acid is as high as 1 in ________.  So, its pH is __________.  An example of a base is ___________.  When we put it into water it dissociates to form ________ions and _____________ions. ◦ What happens to the H + ion concentration? Why?

6.  pH measures the amount of __________________  Draw a diagram that shows the pH scale from 0 to 14. Label it with three words: acid, base, neutral.

7.  The pH of the oceans over the past couple hundred years is (increasing or decreasing).  Why is the pH changing?  How is this related to mass extinctions in the past?

8. Given [H + ], take the –log of that [H + ]. 1.Easy example: pH of a solution with [H + ] = 1 x 10 -8 M pH = -log of the [H + ] = -log (1 x 10 -8 ) = -(-8) = 8 2.More difficult example: pH of a solution with [H + ] = 5.21 x 10 -2 M pH = -log of the [H + ] = -log ( 5.21 x 10 -2 ) = -(-1.283) = 1.283

11. pH + pOH = 14 When given pH, just subtract from 14 to get the pOH.

13.  Blood  Milk  Ocean water  Ketchup  Windex  Drano  Orange juice  Lye  Distilled water  Stomach juice  Gasoline  Sweat  Saliva  Rainwater  Pool water  Lake water Example: Blood 7.35 Example: Blood 7.35