Titration Lab: Alternative Assignment
Directions:
Complete this worksheet as an alternative to the Kitchen Table Titration Lab assignment. Be sure to
answer each question to the fullest and your best ability. If there are any calculations needed, you MUST show all work
to receive full credit. Points will be deducted for incomplete work.
1.
Titration is a procedure that many analytical Chemists use. Explain why a Chemist would need to use titration?
Chemist might do a titration to find the unknown concentration of a solution with already having the concentration to a
known solution that relates to it.
2.
Use the picture to the right and identify the three pieces of lab equipment
needed for a titration. You would a buret, a tile, and a flask.
3.
There are three chemicals involved in a titration process: known, unknown, and
indicator. Explain where each is placed within our apparatus.
The acid is the unknown , known is the base, and the indicator is the observer of the
change in color.
4.
What was the indicator used for our Virtual Titration Lab?
a. What is the role of an indicator?
Indicator detects the color change in a titration.
5.
In Chemistry, how do we measure the concentration of any given solution?
a. What are the three different ways we can show concentration? *hint* I’ve talked about it in LL.
You can show concentration in percent by mass, percent by volume, and molarity.
6.
Explain what a neutralization reaction is?
A neutralization reaction is when a base and acid react and form water and salt.
a. Write the generic equation for neutralization reactions.
HCl + NaOH = NaCl + H2O
b. What happens to the pH of a solution during a neutralization reaction?
It becomes neutral and the base and acid meet in the middle.
7.
Observe the picture above with the three Erlenmeyer Flasks. Identify which flask has reached the end point of
our reaction. Explain how you are able to correctly identify the flask.
I think flask number four is at end point because it is the darkest so it has the most concentration.
If you need any assistance on the remainder of the worksheet, this recording will prove to be useful:
Click here to watch recording
For the next three questions, use the following scenario:
You have an unknown solution of HNO3 and a solution of 0.50 M KOH.
You placed 20 mL of HNO3 into the flask and used 40 mL of KOH from the buret to complete the titration.
8.
Write the balanced chemical equation for the acid-base titration.
_HNO3___________ + ____KOH________  ____________ + ____________
9.
What is the molar ratio of your acid to your base? How did you know?
10.
Calculate the concentration of your unknown solution. You MUST show all work to receive full credit 
For the next three questions, use the following scenario:
You discover an unlabeled solution of Mg(OH)2 on your work bench and decide to use
a solution of 1.25 M HCl for your titration process.
You placed 35 mL of Mg(OH)2 into the flask and used 15 mL of HCl from the buret to complete the titration.
11.
Write the balanced chemical equation for the acid-base titration.
____________ + ____________  ____________ + ____________
12.
What is the molar ratio of your acid to your base? How did you know?
13.
Calculate the concentration of your unknown solution. You MUST show all work to receive full credit 