help with q science project

[gtm]

I'm trying to help my son with a science project on ocean acidification and we're doing a demo using phenol red to show how adding CO2 drops the pH of the water. We have a slide showing the equations and I wanted to add a graphic showing the color scale for pH changes, meaning what's on the comparator that comes with our test kits. I googled like crazy and tried taking a photo, but no luck.

Does anyone have a graphic or can point me to one that I can insert into a Powerpoint file? He really needs a good grade on this!

Thanks, Gary

 

[chem geek]

I couldn't find a ph indicator scale, but Taylor does have some photos of their comparator tubes here and here.

 

[gtm]

Thanks Richard. I had actually found those, but by the time you blow them up to a good size in Powerpoint it doesn't work very well. But thanks much for trying, though. I also have my wife trying to do better than I managed to do with her camera. Thanks again ... Gary