Tanki Online ep.2: Tomato Juice!

I continue my Tanki Online series by buying a new paint. Check out the game here: http://tankionline.com/#friend=64bf4638b.

Question by Amandaan: 1. The pH of tomato juice is about 4.5. The concentration of hydrogen/hydronium ion in the tomato juice is: a?
1. The pH of tomato juice is about 4.5. The concentration of hydrogen/hydronium ion in the tomato juice is:
a. 3.2 x 10-10 M
b. 3.2 x 10-5 M
c. 5.0 x 10-4 M
d. 4.5 M
e. 3.2 x 1010 M

Best answer:

Answer by Josh Brar
ph=-log [H+]
4.5 = -log [H+]
4.5/ second function log = H+

What do you think? Answer below!