Detection the Ionic and non Ionic Compounds

From the first view you can ask this question .

Question

Which of the following substances are ionic, and which are molecular: sodium nitrate, NaNO3(s); sucrose, C12H22O11(s); sodium chloride, NaCl(s); potassium sulfate, K2SO4(s); ethanol, C2H5OH(l); sodium bicarbonate, NaHCO3(s); and calcium sulfate, CaSO4(s)?

Hypothesis/Prediction
(a) Answer the Question, considering the state of matter at room temperature and the chemical formula of each substance. Provide your reasoning for each decision.
(b) Based on your classification, predict whether each substance will dissolve in water and whether any solutions formed will conduct electricity.

Experimental Design
The ionic or molecular nature of several compounds will be determined by applying the tests of solubility and conductivity
Materials
lab apron sodium nitrate, NaNO3(s)
eye protection sucrose, C12H22O11(s)
8 (50-mL beakers sodium chloride, NaCl(s)
distilled water potassium sulfate, K2SO4(s)
wax pencil ethanol, C2H5OH(l)
scoopula sodium bicarbonate, NaHCO3(s)
medicine dropper calcium sulfate, CaSO4(s)