ibstudent77 Posted September 25, 2015 Report Share Posted September 25, 2015 Hey guys, My Bio IA is testing the effect of different concentrations of copper sulfate and lead nitrate on the rate of photosynthesis in an aquatic plant. I've tried with concentrations of 0.1%, 0.3%, 0.5%, 0.7%, 0.9%. However, at these concentrations, there was no photosynthesis. My teacher suggested the concentrations are too high for an aquatic plant to survive in.My question is: What concentrations would be appropriate so there's a difference in the rate of photosynthesis, without making photosynthesis inhibitory? Looking forward to your replies, really need help! Reply Link to post Share on other sites More sharing options...
bguloglu Posted September 25, 2015 Report Share Posted September 25, 2015 (edited) All way too high. I would start with something like 0.05% by mass which I think might still be too high. A good method would be to experiment with serial dilutions until you have a good range. Edited September 25, 2015 by bguloglu Reply Link to post Share on other sites More sharing options...
ibstudent77 Posted September 25, 2015 Author Report Share Posted September 25, 2015 All way too high. I would start with something like 0.05% by mass which I think might still be too high. A good method would be to experiment with serial dilutions until you have a good range. Thanks for the reply! So would you suggest something in the range of 1-5ppm? Or would this be too diluted to see any results? Reply Link to post Share on other sites More sharing options...
bguloglu Posted September 25, 2015 Report Share Posted September 25, 2015 I really don't know, you're just gonna have to try to get a good range. Reply Link to post Share on other sites More sharing options...
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