Which of the following is not a method in which crystals form? a) crystallization b)decrystallization c)water evaporation from a solution d)cooling of magma or lava

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.

the awnser is group 12