Chemestry Assessed Practical

Chemestry Assessed Practical

Variables: The variables for this practical are:

1. The metal that it used- magnesium, copper or iron.

2. The amount of metal that is used- any amount as long as it is

divisible by 0.5 grams.

3. The concentration of the solution of the solution- molarity 0.1M or

0.5M.

I am going to change the amount of metal.

Fair Test: To make this a fair test I must keep everything constant

except the variable (the amount of metal). But even the variable must

be changed at a consistent rate (going up in 0.5g).

Method

Apparatus List:

· Copper Sulfate solution (0.5M).

· Powdered magnesium (15g in total).

· 2x Beaker.

· Measuring cylinder.

· Safety goggles.

Measurements: I am going to use 50cm³ of copper sulfate and then us

the following measurements of powdered magnesium 0.5g, 1.0g, 1.5g,

2.0g, and 2.5g.

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Safety: I will wear safety goggles throughout the experiment, I will

be careful when I pour the solution and when I am shaking it I will

shake it gently.

Equations:

[IMAGE]Magnesium + Copper Magnesium + Copper

Sulfate Sulfate

[IMAGE]Mg + CuSO4 MgSO4 + Cu

Method: I will measure out 50cm³ of copper sulfate solution (0.5M) in

a measuring cylinder then add it to a polystyrene cup, as polystyrene

is a bad conductor of heat. Before I add the magnesium I will wait

until the copper sulfate solution is at a consistent temperature and

take and record the start temperature. I will then add the desired

amount of magnesium (as it already weighed out for me) to the copper

sulfate solution. I will observe what happens and measure the

temperature change from the start to 1 minute and to 2 minutes. I will

repeat this twice and then work out an average temperature change for

each separate amount of powdered magnesium. If I get a result that is

completely different to the other one then I will record this as a