2006-11-30 07:48:45 · 3 answers · asked by skyler t 2 in Science & Mathematics ➔ Chemistry
KI. The atomic symbol for potassium is K and of iodine I. The charge on elements of group IA of the periodic table, which is where K is, is +1. The charge on iodide in group VIIA is -1. So the two go together 1:1 as KI. Elements in group VIIA can form other ions, such as hypoiodite, OI-, iodite, IO2-, iodate, IO3-, and periodate, IO4-. But they don't enter in here.
2006-11-30 07:54:34 · answer #1 · answered by steve_geo1 7 · 1⤊ 0⤋
Formula for potassium iodide is KI
One way to make potassium iodide is to react the hydroxide with hydroiodic acid. The resulting salt can then be purified by recrystallization.
KOH(aq) + HI(aq) â KI(aq) + H2O(l)
the other way is to react potassium metal with halogens to form potassium halides. So, it burns with iodine, I2, to form potassium(I) iodide, KI.
2K(s) + I2(s) â 2KI(s)
2006-11-30 16:01:45 · answer #2 · answered by zoulou z 1 · 0⤊ 0⤋
Simply:
KI
Because 'K' is a +1 ion and 'I' is a -1 ion. Since their sum is zero, all is well, no subscripts needed.
Get an "A".
2006-11-30 21:47:46 · answer #3 · answered by teachr 5 · 0⤊ 0⤋