Pre-lab questions 1 point each unless otherwise noted
1. would you expect any charged particles in distilled / de-ionized water? why or why not?
2. the chemical formula for table sugar is c12h22o11. is sugar a covalent or an ionic compound?
3. does sugar dissolve in water?
4. the chemical formula for table salt is nac1. is salt a covalent or an ionic compound?
5. does salt dissolve in water?
6. define electrolyte.
7. hypothesis: 4 points write a statement you can test using distilled water, a sugar water solution, a salt-water solution, and conductivity of those solutions. this can be one sentence or a separate sentence for each substance tested. example: a sample of distilled water will (or will not) conduct electricity.
8. independent variable:
9. dependent variable:
10. experiment / procedure: 4 points write a series of step-by-step detailed instructions of how you would test the conductivity of each substance. don’t forget to also tell how you want the sugar and salt solutions made.
11. data / observations: 4 points set up a table or list observations for each solution tested.
12. conclusion: 4 points tell how your experiments agreed or disagreed with the hypotheses stated earlier.