What is the formula of calcium chloride?

1 Answer
Feb 13, 2018

Answer:

See below...

Explanation:

Calcium chloride is an ionic compound.

#therefore# it is made of ions. As we know, ions can i have #+# or #-# charge but the key idea is that the overall charge of an ionic compound has to balance out to be neutral.

Calcium is in group 2 #therefore# it has a 2+ charge.
Chlorine is in group 7 #therefore# it has a -1 charge.

As the overall charge is 0 (neutral) the charges must balance. Therefore we need two chlorine ions to balance out the calcium ion charge as #2-2=0#

#therefore# have #CaCl_2#

Note that the 2 is supposed to be little and under the chlorine symbol, i just don't know how to edit it.