Science:Making A Dilution Series

Making A Dilution Series:

Aim: To make a Dilution series to investigate concentration. 

Method: 1. Place the six test tubes in a test tube rack. Label the rack with numbers 1-6. 

2. using the measuring cylinder. full the test tubes 1 with 10 mL of water. fill the remaining test tubes with 5 ml of water. 

3. Using your tweezers, add a single crystal of potassium peregrinate to test tube 1. 

4. Gently shake the test tube until the crystal dissolved. 

5. using the transfer pipette, carefully remove exactly 5 mL from test tube 1 and pour it into test tube 2. 

6. Rinse the transfer pipette thoroughly to ensure that no purple solution remains. 

7. gently shake test tube 2 and repeat the transfer process, transfer exactly 5 mL of solution form test tube 2 to test tube 3.

 8. Rinse the pipette again and repeat the transfer process for test tubes 4,5 and 6. 

Result: Basically all it really did was make the purple liquid lighter and lighter because we are basically adding water which make it lighter and then after adding more and more it started to look like normal water with a hint of purple. 

Discussion:  Solute= Crystals   Solvent= Water  Solution= Each tube changed color  Dilute= Basically each time we poured water into the test tube it changed color to be lighter  Concentrated= More crystals more darker the purple will be.

Basically when you add the solute and solvent together it made it concentrated. when you add more solvent it makes the water and purple color more dilute but when you add more solute to the solvent makes the solution more concentrated