A solution is 5 mM in each of the following ions: numberionKsp of M(OH)2
1Mg2+1.8e-11
2Cd2+2.5e-14
3Co2+1.6e-15
4Zn2+4.4e-17
5Cu2+2.2e-20
Indicate which of the metal ions would precipitate (or start to precipitate) at each of the following pH values. Indicate your answer with the number of the ion. Use 0 to indicate no precipitate. If more than one precipitate is expected, list the numbers in increasing order and separate them with commas. For example, 3,4,5 is ok but 5,4,3 is not.
pH = 6.00: ? (1,2,3,4,5 list all that apply?)
pH = 8.00: ? (1,2,3,4,5 list all that apply?)
What is the pH to the nearest 0.1 pH unit at which Cu(OH)2 begins to precipitate? pH = ?