![Embarassed :oops:](./images/smilies/icon_redface.gif)
On friday the Head teacher was explaining the change in pH in relation to molarity using HCL as his example. They are doing enzymes in Biology and working with Junket and the next lot of experiments are showing the effect of change of pH on the reactions. He had the concept right but was heading in the wrong direction.
Using only universal indicator and charts which start at pH 3 he started with 0.5M HCl and proceded to go to 1M, 4M, 6M to try and get pH1. I brought out the pH probe to try and show him they were all well below 1 but he said he didn't need it. I was trying to work out how to subtly say to him he was heading inthe wrong direction. He needed to start with 1M pH0 and serial dilute to 0.1M, 0.01M 0.001M to get up to pH 1,2 and 3 but I didn't know how to go about it. I'm not a very forthright person.
How have others handled this type of situation. Those of you with degrees I imagine would be able to speak up more easily but when most of your knowledge has been gained from listening through walls and asking questions it's hard to tell someone who thinks they know more than you that they are not quite correct.
![Unsure :unsure:](./images/smilies/unsure.gif)
Wendy