Chemistry Trip to Christchurch
Throughout Term 2, Level 3 Chemistry have been working on the 3.1 Quantitative Analysis standard. This involves collecting and processing data in a written report about the concentration of chloride ions in Salt Water Creek.
On the 1st of May, we travelled into Timaru to collect water samples from four locations along Salt Water Creek. These results were taken to enable us to be able to investigate to amount of chloride ions present in the water. A 4km walk carrying our heavy bottles of water was made easy by a sunny day and some quality conversation.
On the 12th of June, we travelled up to the University of Canterbury to analyse our samples. This involved titrating our samples with Silver Nitrate and Potassium Chromate to determine the volume of water used. We then used this volume to calculate the concentration of chloride ions present in each of the samples. The general trend we saw was that the further away from the mouth we sampled, the lower the concentration of chloride ions. While it was quite a gruelling day for some (six hours of titrating and calculating!), it was nonetheless worthwhile and enjoyable. We now have to finish writing our final reports.