An investigation into how the ammount of water in the endothermic reaction between sodium hydrocarbonate and citric acid.
Planning
Aim: the aim of this experiment is to investigate if the reaction between sodium hydro carbonate and citric acid in water is worth further investigation for implication into a portable ice pack.
Hypothesis: I believe that as the amount of water increases so the amount of time it takes for the reactants to reach a same lower temperature. I also believe that they won’t go as cold. I believe this as the greater the amount of water there is the greater amount of energy is going to be needed to cool down the water as they have to cool down each gram of water with the same amount of energy. Also with a greater amount of water the concentration of the two reactants will be less and so the collations and thus reactions will occur less often and so it will be longer before each reaction occurs. This shall mean that probably when these results are recorded on a graph such as amount of water on the x-axis and time it takes to reach a certain temperature on the y-axis. It will appear proportional except it will be slightly in favour of going up as seen in this diagram.
