Question

sample response: salt is ionic, and oil is covalent. if you add water, the salt will dissolve in the water, and the oil will float to the top. you could then skim the oil and start over with sugar. to double - check, you could even make sure the oil does not conduct electricity! compare your response to the sample above. which ideas did you include? the idea that water will dissolve salt the idea that water does not dissolve oil the idea of using electricity to test done

Explanation:

The sample response explicitly states that salt dissolves in water, oil floats (meaning water does not dissolve oil), and suggests using an electricity test to verify the oil's non-ionic nature. All three ideas are present in the sample.

Answer:

• the idea that water will dissolve salt
• the idea that water does not dissolve oil
• the idea of using electricity to test