What is the total number of ions present in the formula Na2SO4?

A. 2
B. 3
C. 4
D. 6

The answer given is B. 3, why?

2 Answers
Feb 17, 2016

Answer:

The answer should be 3 ions.

Explanation:

After looking again it seems to me that the number of ions in one molecule are actually just Na, S and O, which means 3 ions.
#color (red)"What you mentioned Na, S and O are three elements in the"# #color (red)"given compound."#
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.

Given compound is #"Na"_2"SO"_4#
If one breaks up the given compound in its constituent ions one obtains
#2" cations of sodium, Na"^+# and #1" anion as sulfate, SO"_4^(2-)#

#:. #Total 3 ions.

Feb 17, 2016

Answer:

Let's see how it behaves in water.

Explanation:

#Na_2SO_4 -> 2 Na^+ + SO_4^2-#
So it's free ions.