How many different B vitamins are there? And what do they do?

What are the pH levels of Vitamins A, B, C, D, and E?

• I am planning my science fair project. My question is, "How do different vitamins and minerals affect a plant's (haven't decided what plant yet) growth and health?" I plan on having different plants (preferable a flowering one) and giving them a different vitamin or mineral through their water to see how it affects there growth and health. I want to know why though. I've come up with the idea of measuring the water's pH level. I want to do this to see if it just had no affect on the plant or caused a chemical complication or it just wasn't able to absorb it. If I keep adding it over and over again and that pH level is shown in the water then I would know that it didn't absorb it. Where or what are the pH levels of these. Any tips or alterations for my experiment are welcome. If my idea to find out the amount of vitamin won't work then what could I do to measure it?

• Answer:

  Wasup! I'm realizing you have a low chance of anyone answering your question. I am confused to be honest, I have never done that before! Go on this website http://www.sciencebuddies.org/science-fair-projects/phpBB3/ucp.php?mode=register say you are older than what it states, and make an account. There ask a question, and it will be responded to for sure, from a science expert. Sorry i couldn't help much.