Lesson 20

Today we talked about dilution. When you dilute something you make it either less basic or less acidic. 7 is the neutral number in the pH scale and by diluting a solution you can approach 7 but you can't turn an acid into a base and visa versa by dilution. We also learned that between each number on the pH scale there is a 10 fold. So 6 is 10 times more acidic than 7 and 5 is 100 times more acidic than 7 and so on.

 

Practice Problems

1. How much more basic is 9 than 7?

100 times more basic

 

2. To get a pH of 10 how much would you have to dilute 0.010 M of NaOH?

With 99 mL or water and 1 mL of the NaOH solution

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