Jan 9th-Nick kim

 Today we have learned how to how to make solution into more concentrated form

-main idea is to know that no matter how solution has become concentraded, it still has same amount of mole

 Therefore, when solution become more concentrated only its volume and molarity

 Equation:

 

Example

I have 20.0ml of 0.200M NaOH solution but i need 100.0ml of NaOH .Calculate the new concentration.

Equation:
L1M1=L2M2

20.0ml x 0.200M = 100.0ml x M2
4mol=100.0mlM2
4mol/100ml=M2

Therefore M2(new concentration) is 0.04ml

here are video that will help
http://www.youtube.com/watch?v=0dRwHZCDBp4

practice questions
http://www.youtube.com/watch?v=KM2uzc8msas&feature=related