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PH. There is a formula to find pH pH = -log [H + ] or pH = -log [H 3 O + ] – (brackets around a substance means that substances concentration in molarity)

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http://www.youtube.com/watch?v=ANi709MYnWg

E. Diluting an Acid or Base when you to an , you change the add water acid or base [H3O+(aq)] or the [OH(aq)] diluting an acid will the until a pH of is reached decrease [H3O+(aq)] 7.0 diluting a base will the until a pH of is reached decrease [OH-(aq)] 7.0

Formulas to remember: pH = - log [H3O+] pOH = - log [OH-] [H3O+] = 10-pH [OH-] = 10-pOH C = n/v CiVi = CfVf

Remember: CiVi = CfVf A concentrated solution is made by dissolving 5g of HCl into 30 L of water. You then take 10 mL of this solution and dilute it to a volume of 50 L. What is the pH of the diluted solution?

Practice Questions Ch. 6 Study Sheet Ch. 6 test tomorrow