In this investigation I am going to investigate the various heat released during a displacement reaction when one factor, the variable, is changed. There are a number of variables which could be used in this experiment. You can change the metal used, the concentration of the metal salt, the amount of the metal, the type of metal salt, or the volume of the solution. In the experiment, the independent variable will be the concentration of metal salt. This can be varied from 0% to 100%. I therefore feel it would be sensible to measure 0%, 20%, 40%, 60%, 80%, and 100% concentration. The 0% would be the control: if anything changes with this concentration, something has obviously gone wrong.
This experiment can only be kept fair if there is only one variable. As I have already stated, this will be the concentration of metal salt. This means that any of the other possible variables must be kept constant.
So the type of metal must be the same, as must the amount of the metal. Also, the type of metal salt should be kept constant, along with the volume of the solution. A further constant should be the amount of stirring, if any. One final constant will be the start temperature, although this could quite easily vary, since it will be room temperature.
This experiment will need to be reliable in order to be certain of the results and conclusions. To do this, the experiment should be repeated, in order to try and avoid anomalies. If any anomalies are obtained, the result will be omitted and experiment repeated for that concentration. I hope to obtain 3 results for each concentration, but cannot be sure that I will have time to get these.
There will not be much equipment needed for...