1. One way to determine the degree of saturation of a solid-liquid solution is to drop a crystal of the solute into the solution. If the crystal sits at the bottom of the container, the solution is
(1 point)
saturated.
unsaturated.
supersaturated.
concentrated.
2. A 25-g sample of sugar was dissolved in 50 g of water. The concentration of the solution is
(1 point)
50 percent by mass.
33 percent by mass.
0.5 M.
50 percent by volume.
3. Which of the following is NOT a property of an acid?
(1 point)
tastes sour
usually reacts with a metal
changes the color of an indicator
feels slippery
4. A base is defined as a compound that produces
(1 point)
hydroxide ions in solution.
hydrogen ions in solution.
hydronium ions in solution.
sodium ions in solution.
5. An acid can be defined as
(1 point)
a proton acceptor.
a proton donor.
neither a proton donor nor a proton acceptor.
both a proton donor and a proton acceptor.
6. Tomatoes have a hydronium ion concentration of 1 x 10-4 M. What is the pH of a tomato? (1 point)
4
-4
10
1 x 10-4
7. Which of the following are examples of strong electrolytes?
(1 point)
strong and weak bases
strong acids and strong bases
weak acids and weak bases
pure water and buffers
Completion
Complete each sentence or statement.
8. A food packet taken on a camping trip has a warming packet. This packet contains water and a solute that releases heat when it is dissolved. The dissolving process for this solute and solvent can be described as ____________________.
(1 point)
9. Most acids form ions in solution by ____________________, and most bases form ions in solution by ____________________.
(2 points)
10. When a substance donates a proton during a chemical reaction, that substance can be classified as a(an) ____________________.
(1 point)
11. Acetic acid is considered a weak ____________________ because it only partially ionizes.
(1 point)
Short Answer
12. What is the difference between a saturated solution and an unsaturated solution?
(3 points)
13. Which will freeze at a higher temperature—a freshwater marsh or a saltwater marsh? Explain your answer.
(3 points)
14. You place a drop of a solution on red litmus paper, and no color change occurs. Can you conclude that the solution is neutral because no color change occurred? Explain your answer.
(3 points)
15. What are the products of a neutralization reaction?
(2 points)
(1 point)
saturated.
unsaturated.
supersaturated.
concentrated.
2. A 25-g sample of sugar was dissolved in 50 g of water. The concentration of the solution is
(1 point)
50 percent by mass.
33 percent by mass.
0.5 M.
50 percent by volume.
3. Which of the following is NOT a property of an acid?
(1 point)
tastes sour
usually reacts with a metal
changes the color of an indicator
feels slippery
4. A base is defined as a compound that produces
(1 point)
hydroxide ions in solution.
hydrogen ions in solution.
hydronium ions in solution.
sodium ions in solution.
5. An acid can be defined as
(1 point)
a proton acceptor.
a proton donor.
neither a proton donor nor a proton acceptor.
both a proton donor and a proton acceptor.
6. Tomatoes have a hydronium ion concentration of 1 x 10-4 M. What is the pH of a tomato? (1 point)
4
-4
10
1 x 10-4
7. Which of the following are examples of strong electrolytes?
(1 point)
strong and weak bases
strong acids and strong bases
weak acids and weak bases
pure water and buffers
Completion
Complete each sentence or statement.
8. A food packet taken on a camping trip has a warming packet. This packet contains water and a solute that releases heat when it is dissolved. The dissolving process for this solute and solvent can be described as ____________________.
(1 point)
9. Most acids form ions in solution by ____________________, and most bases form ions in solution by ____________________.
(2 points)
10. When a substance donates a proton during a chemical reaction, that substance can be classified as a(an) ____________________.
(1 point)
11. Acetic acid is considered a weak ____________________ because it only partially ionizes.
(1 point)
Short Answer
12. What is the difference between a saturated solution and an unsaturated solution?
(3 points)
13. Which will freeze at a higher temperature—a freshwater marsh or a saltwater marsh? Explain your answer.
(3 points)
14. You place a drop of a solution on red litmus paper, and no color change occurs. Can you conclude that the solution is neutral because no color change occurred? Explain your answer.
(3 points)
15. What are the products of a neutralization reaction?
(2 points)