Classic results for NaOH and HCl titration

Getting a classic set of results for the  titration of NaOH and HCl is not that difficult but it is nice when we can get students to this first time every time.

We are using the Pasco sensors and the Capstone software to capture the information.

In this experiment we are titrating NaOH against HCl.
 We set the burette dripping at a constant rate and then measure the temperature change and the pH change using probes.

The magnetic stirrer ensures the compounds are well mixed and the Sparklink Air delivers the information to the laptop where the information is captured instantaneously.
The experiment is quick to set up and easy to use, and most importantly very easy to replicate.

Knitting some Intestines

We went to the Bett Show a few weeks ago and there we saw a model of a Liver. It had been knitted so we thought we would have a go. After much searching on the net we finally found a pattern and so we have started.
The Model is life sized. We have started at the anus and rectum and we are now starting work on the large intestine. The small intestine is about 27 feet long itself and so will take a considerable amount of time to do.

Day by day the knitting goes on and the stuffing of them. The large is about half done in the picture.

Over the weeks the intestines continue to grow.








The large intestine is complete and now 20 feet or so of small intestine needs to be knitted.