A wildlife biologist in Nova Scotia is testing the pH of stream water. She hopes that the pH of the water is greater than 5.5 so that Atlantic Salmon returning this year to their natal streams will be able to reproduce. The hydrogen ion concentration of the water is 0.0000019 moles per liter. To the nearest tenth, what is the pH of the water?
it would be -log(.0000019), right? but what does that equal to?
2 answers
never mind..i actually figured this out.
pH = -log(H^+) = -log(1.9 x 10^-6) = -(-5.72) = 5.72. To the nearest tenth, that would be pH = 5.7.
If you don't know how to plug that into your calculator, just enter 0.0000019 and hit the log button. The answer will be -5.72 and you multiply that by -1 which changes the number to a positive number.
If you don't know how to plug that into your calculator, just enter 0.0000019 and hit the log button. The answer will be -5.72 and you multiply that by -1 which changes the number to a positive number.
1 answer