Find the hydroxide ion concentration [OH-] of an HCl solution with a pH of 6.93.

[OH-] = 1.8 x 10^-7

Explanation:

pH + pOH = 14 --> 6.93 + pOH = 14 *subtract 6.93 from both sides

pOH = 7.07

-->

10^pH => 10^-6.93 => 1e - 6.93 [H+]

-->

H+ x OH- = 1 x 10^-6.93 *divide H+ from both sides

-->

[OH-] = 1.17 x 10^-7 or 1.8 x 10^-7

answer: at room temperature (roughly 20 degrees c), you can dissolve 203.9 grams (or 200 grams) of sugar in 100 ml of water. as water temperature increases, the amount of sugar that will dissolve increases, up to about 500 grams of sugar in 100 ml water at 100 degrees c.

explanation: