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Chemistry Test 7
Chapters 25-29; Lab 13.14
Question | Answer |
---|---|
1. When water ionizes, it creates H+ ions which are _______ and OH– ions which are_____. | 1.acidic, basic |
2. Evaporation of a liquid has a________effect on the surface from which it evaporates. | 2.cooling |
3. A solution having a pH of 6 is ________. | 3.acidic |
4. The unique nature of water keeps the temperature of the earth’s surface livable. | 4.true |
5. The unique nature of water keeps lakes from freezing solid in the winter months. | 5.true |
6. Blood and lymph are made of mostly protein. | 6.false |
7. Water serves as a medium in which food and nutrient substances dissolve to feed living cells. | 7.true |
8. Acid/base reactions produce water and a salt. | 8.true |
9. Soft drinks contain acid. | 9.true |
10. Milk of magnesia works by neutralizing stomach acid. | 10.true |
11. The following are methods for separating suspensions: | 11.filtration, settling, centrifugation |
12. Which of the following reactions shows the correct, complete ionization of sodium hydroxide: | 12.NaOH ---> Na+ + OH- |
13. The following reactions shows the correct way that hydrochloric acid normally reacts with sodium hydroxide: | 13.HCl + NaOH ---> NaCl + H2O |