Saturday, December 5, 2009

Copper (II) Chloride Lab

This class all we did was learn about dilution. For the next class we will be doing a cupric chloride lab. What we're will be doing is diluting a solution of copper II chloride. The lab is individual but you will be work in a group. The procedure is simple but we need to find the mass of copper II chloride we will be using. To find the mass here are a few examples we did in class.

1) Peter is asked to make a 250mL solution of K2SO4 with a concerntration of 0.55M. What steps will he follow? The conversions used here are: concentration - mole - mass
(0.55/1L)(0.25L)= make sure to convert mL into Litres!
(.1375mol)(174.3g/1mol)=
23.97grams

Dilution of Solutions:
When you add water concentration decreases. If volume is doubled, concentration is halved.
6.0L 2.0mol/L 12.0mol
12.0L 1.0mol/L 12.0mol

For the lab, the problem is how you can make a 0.300M Solution of Copper II Chloride?
In my solution I will be using 60mL of water. To know how much mass of Cooper II Chloride I will need for my solution I will use the conversions: concentration - mole - mass
(0.300mol/L)(.06L)=.018mol
(.018mol)(134.5g/mol)=2.421grams


for a dilutions worksheet, click here

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