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Topic: Dilution Do Now:

Topic: Dilution Do Now :

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Topic: Dilution Do Now :. Amount of solute is constant Amount of solvent increases. Dilution. Amount solute in concentrated solution EQUALS Amount solute in dilute solution. # is the same!. original solution is diluted What can say about number of solute particles in a & c?. - PowerPoint PPT Presentation

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Page 1: Topic: Dilution Do Now :

Topic: Dilution

Do Now:

Page 2: Topic: Dilution Do Now :

Amount of solute is constantAmount of solvent increases

Amount solute in concentrated solution

EQUALSAmount solute in dilute solution

Dilution

Page 3: Topic: Dilution Do Now :

original solution is diluted

What can say about number of solute particles in a & c?

# is the same!

amount of solvent has increased!

Page 4: Topic: Dilution Do Now :

REMINDER: Molarity

Molarity = # of moles of solute Liters of solution

Page 5: Topic: Dilution Do Now :

MolarityC x VolumeC = MolarityD x VolumeD

MC x VC = MD x VD

(C = concentrated D = dilute)

Page 6: Topic: Dilution Do Now :

300ml of 2.5M NaOH is diluted to 750ml. Find the molarity of the diluted solution

Page 7: Topic: Dilution Do Now :

Example: We are doing a lab and the procedure calls for 300ml 1.2 M NaOH. However, all we have is a bottle of 5.5M NaOH.

We have to dilute it!!!!

The Equation: MC x VC = MD x VD

5.5 M x VC = 1.2 M x 0.3 L

V1 = (1.2 M x 0.3 L) 5.5 M

Anytime you

work with

Molarity, if

have to

convert to L

So what does 65 ml tell us?!V1 = 0.065 L = 65 mL

Page 8: Topic: Dilution Do Now :

To prepare the 1.2 M NaOH solution, you pour 65 mL of 5.5 M NaOH into your container and add water to get 300 mL final volume (300-65 = 235 ml water added)