Sample Problem 4.1
Determining Moles of Ions in Aqueous Ionic Solutions
PROBLEM:
How many moles of each ion are present in the following solutions?
(a) 5.0 mol of ammonium sulfate dissolved in water
(b) 78.5 g of cesium bromide dissolved in water
(c) 7.42 x 1022 formula units of copper(II) nitrate dissolved in water
(d) 35 mL of 0.84 M zinc chloride
PLAN:
SOLUTION:
Consider molecular formulas and the ionization of salts in water.
5.0 mol (NH4)2SO4 x
= 10. mol NH4+
5.0 mol SO42-
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