Repete of Method

First my dad cut the copper pipe into 5 cm length sections with a saw. He cut 12 portions. I then labelled the clear plastic cups ,which were all the same size, with the names of the different solutions. The different solutions are the water and vingear, water and lemon juice, water and bleach and just water. I need 12 cups because it have to repete the experiment three times. to make it fair.

I then measured the water and lemon juice with a tablespoon. I put 3 tablespoons of water and three tablespoons of lemon juice. I also used a neurofen dropper to make it exact. I repeted this with the bleach and vinegar solution. For the cup with just water i put 6 tablespoons of water. The above steps were then repeted three times.

before I put the copper pipe sections in each cup. I measured each copper pipe section first. I then put one copper pipe section in each cup. i then put the cups in the chocolate boxes so that they wouldn't be tipped over as easily. They are all stored in the cubby shelf of my cupboard. After 4 weeks I am planning on measuring the copper pipes gain to see the percentage difference in weight. I'm not sure if it will be a gain or loss in weight.

To get the exact measurements of the weigt i used this awesome electronic scale which measures a point of a gram. How cool is that.