Question #ac64e
1 Answer
Dec 4, 2017
Here's what I got.
Explanation:
Interestingly enough, the name sodium phosphate is actually used to describe a family of salts that contain sodium cations and phosphate anions in various ratios.
My guess is that you are supposed to treat "sodium phosphate" as trisodium phosphate,
The idea here is that a formula unit of sodium phosphate,
- three sodium cations,
#3 xx "Na"^(+)# - one phosphate anion,
#1 xx "PO"_4^(3-)#
This, of course, implies that
In other words, you have
#"no. of moles of Na"^(+) = 3 xx "no. of moles of Na"_3"PO"_4# #"no. of moles of PO"_4^(3-) = "no. of moles of Na"_3"PO"_4#
Since you know that your sample contains