Acids, bases, and salts review activity
starstarstarstarstarstarstarstarstarstar
by Olivia Cauthorn Cauthorn
| 20 Questions
Note from the author:
Acids and bases Regents Chemistry review activity

Observe Station 1:

Test tube 1 contents: Copper and hydrochloric acid
Test tube 2 contents: Zinc and hydrochloric acid
1
1 pt
In terms of reactivity, explain the differences between the two tubes.
2
1 pt
In terms of Table J, explain the differences between the two tubes
3
1 pt
On a dry erase board or scrap piece of paper:
Write out the ionization of sulfuric acid.
Then take a picture and insert it here (there is an image option).

Station 2:

Use a fresh piece of pH paper to test each substance.
Put used pH paper into the waste beaker.
4
1 pt
Categorize each as an acid, base, or neither:
  • Substance 1
  • Substance 2
  • Substance 3
  • Substance 4
  • Acid
  • Base
  • Neither (neutral)
5
1 pt
Compare the hydrogen ion (or hydronium ion) concentration of the substance that is an acid to a substance that is a base. Be sure to mention concentration of ions in your answer!
6
1 pt
On a dry erase board or a scrap piece of paper, write out the "net" reaction of neutralization.
Take a picture and insert it here:
7
1 pt
Compare the hydrogen ion concentration of a substance with a pH of 5 to a substance with a pH of 8.

Station 3:

RINSE THE TESTER PROBES AFTER EACH USE!
Start by rinsing the conductivity test probe ends. Dry with some paper towel.
Use the conductivity tester to test each substance. Rinse then test the next one.
Continue until all have been tested. Rinse the tester, dry, and throw away your paper towel.

8
1 pt
Categorize your results:
  • Substance 1
  • Substance 2
  • Substance 3
  • Substance 4
  • Electrolyte
  • Nonelectrolyte
9
1 pt
In terms of ions, explain why some substances were able to conduct electricity:
10
1 pt
On a dry erase board or scrap piece of paper:
Write out the the dissociation of and insert a picture:

11
1 pt
On a dry erase board or scrap piece of paper:
Write out the the dissociation of calcium hydroxide and insert a picture:

Station 4:

Examine the test tubes. Each test tube rack have the same substance mixed with different indicators.
12
1 pt
What could the pH of the substance in test tube rack 1 possibly be?
Use your observations and table M to SUPPORT your answer!
13
1 pt
What could the pH of the substance in test tube rack 2 possibly be?
Use your observations and table M to SUPPORT your answer!
14
1 pt
What could the pH of the substance in test tube rack 3 possibly be?
Use your observations and table M to SUPPORT your answer!
15
1 pt
On a dry erase board or scrap piece of paper:

It takes 75ml of a 2.5M HCl solution to neutralize 55ml of a base of unknown concentration. Calculate the concentration of an unknown basic solution.

Show a setup and calculation and insert the picture here.

Virtual Lab Titration:

1. The flask is filled with 10mL of an unknown concentration of HCl.
2. Phenolpthalein indicator is added to the flask.
3. Record the initial volume of the base in the buret
4. You will now start adding base (0.25M NaOH) from the buret into the flask to neutralize the acid. The flask is gently swirled as the base is added. A pink color should appear as the base is added, but it will disappear as the flask is swirled. The end-point of the titration will be reached when 1 drop of base makes the solution turn and stay pink.
5. Record the final volume of the base from the buret that was needed to neutralize the acid.
16
1 pt
On a dry erase board or scrap piece of paper:

Determine the molarity of HCl using the data you collected and the titration formula (Table T). The concentration of base that was used was 0.25M.

Show a setup and calculation and insert the picture here.
17
1 pt
If the actual concentration of the HCl was 0.33M, what is your percent error?
18
1 pt
How would this experiment be different if you had forgotten to add phenolphthalein?
Environmental studies usually involve an analysis of precipitation and its response to pollution. To quantify the degree of contamination in natural rain water or snow, titration is used. The process is quick and results are reliable. Since most titration processes do not require expensive or specialized equipment, the test can be performed often and in different areas with relatively little effort.
19
1 pt
A 1000.0 mL sample of lake water is titrated using 0.100 mL of a 0.100 M base solution. What is the molarity of the acid in the lake water?  

Show a setup and calculation and insert the picture here.
20
1 pt
Based on the molarity of the acid calculated above, what is the pH of the lake water?
Add to my formatives list