Formative true/false exercise

Acids, bases, pH, pOH, pKa, dissociation of water, neutralization

The following are a series of true false questions that are a preview of the chapter content.

1.True	Ammonia dissolved in water, NH3(aq), is a common household base.
2. False	Acid solutions have a high pH.
3. True	Oxides of metals like CaO form basic solutions when dissolved in water.
4. False	Pure water is neutral because it contains no hydronium or hydroxide ions.
5. True	An example of a strong acid is hydrochloric acid.
6. True	Neutral solutions have equal numbers of H1+ ions and OH1- ions.
7. False	The pH scale has a range from 1 to 14.
8. True	Acids are sources of H1+ or hydronium ions.
9. True	Binary acids are aqueous solutions of compounds like HCl, H2S, HBr.
10. False	A polyprotic acid like sulfuric acid H2SO4 releases both H1+ ions at the same time.
11. True	Nonmetal oxides like SO2 and CO2 combine with rain water to form acid precipitation.
12. True	A pH of "7" is neutral for water solutions at 25 o C.
13. False	Weak acids do not react with bases.
14. True	Traditional acids like HCl(aq) react with traditional bases like NaOH(aq) to form water and a salt.
15. True	The use of the term (aq) means a substance is dissolved in water.
16. False	Acids are not found in nature.
17. False	Seawater is neutral with a pH of "7".
18. False	Human blood is acidic with a pH below "7".
19. True	All acids that contain oxygen have a weak bond between hydrogen and oxygen.
20. True	Hydroxide ions, OH1-, are released in water solutions of traditional bases.

 Dr. Walt Volland all rights reserved 1997-2005 revised April 30, 2005