Separating a Mixture of Coloured Compounds

Aim:
To separate the different pigments in inks and dyes using chromatography.

 Equipment:

• Ink from ballpoint pens
• Marker pens or food coloring
• 250mL beaker
• Strip of filter paper
• Scissors
• Adhesive tape 
• pencil or ice block stick
• chromatography solution

Method:

1. Cut strip of filter paper that is long enough to reach the bottom of your beaker and able to wrap around your pencil or ice-block stick.
2. Rule a line approximately 2 cm from the bottom piece of your paper.
3. fill your beaker with enough chromatography solution to fill your beaker to a depth of 1cm
4. place a dot of ink above the ruled line on your filter paper. you need to produce a concentrated dot of ink so repeated applications are necessary.
5. Suspend the strip of paper from the pencil or stick.

Making a Dilution series

Aim:
I want to investigate how make a dilution series

Equipment:
Test Tube Rack
Test Tubes
10mL measuring cylinder

Method:

Fill measuring cylinder with 10mL of water
Add 10mL of water to a test tube
Add 5mL of water to 5 more tests tube
Add a small spatulaful of Potassium Permanganate to the first 10mL test tube of water
Add 5mL of the dark purple Potassium Permanganate into the second test tube
Add 5mL of the second tube into the third test tube.

Add 5mL of the third test tube into the fourth test tube.

Add 5mL of the fourth test tube into the fifth test tube.

Add 5mL of the fifth test tube into the sixth test tube.

Results:

Discussion:

The first test tube went a dark purple colour.

As we poured 5mL from each test tube into the next test tube, the colour lightened each time.

I learnt that The test tube with the darkest colour has the most  Potassium Permanganate in it.

My Persuasive Writing

The Referee is always right.

Have you ever wondered why

you have been benched or sidelined during a sport you enjoyed and then

blamed it on the referee?

Well wonder no more the problem isn’t with the referee it is actually you!

You may think I’m crazy but if you read hard enough you will see what I

mean. For starters they are older and probably know more than you. They

are only ever going to blow the whistle if you do anything out of the rules

for example basketball, you are to dribble the ball and not just hold it in your arms.

I mean if you blame the benching or being put on the sidelines on the referee well

you will get in more trouble than you already are in. you should always listen to the

referee. All the rugby or soccer stars you know they listen to the referee. They will

get the occasional yellow or red card but they never argue back to the referee

You may think it is hard to be the player. But just think about how hard it is to

be a referee. Just how hard it is to get the players to listen to him or her, because

it is really hard. Think how hard it is to get one person to pay attention, then try a

good seven or eight. Not as easy as you thought was it!

So when your on the field remember to listen to the referee. Because they choose

to get up in the morning to coach your game. They could choose not to get up and

just stay in bed. So think of that before you decide to talk back to the referee.