1) A chemist was deciding what chemical to use in a handwarmer. She studies 2 compounds. One is a nonpolar covalent compound that is safe and nontoxic. The other is an ionic compound. It is poisonous if ingested. What tests could she do to tell them apart? Give two possible observations or tests she can run to verify the substance. Which substance would you use to make the handwarmer and why?

A hand warmer is a little substance which can be put in between the hands in order to heat them up. This is particularly of necessity in the cold weather when the hands are cold.

The chemist can distinguish the polar substance from the nonpolar substance by dissolving each substance in water. The polar substance will dissolve in water while the non polar substance will not dissolve in water.

Secondly, the two substances can be heated and the melting temperatures are observed. The ionic substance will melt at a much higher temperature than the nonpolar substance. The Nonpolar substance which is nontoxic is a better material to be used in making the hand warmers.

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