VEC pH MINI- LAB (15 pts)
Name: _______________________________________________
Block: 1 2
4
6
8
Date: ______________
Group: K L M N O P
Pre-Lab: Engage
1. What do we know about pH?
2. What does pH represent?
3. How do we measure pH?
4. Safety Issues: What samples require goggles? Gloves?
Lab- Explore: Using Litmus Paper, determine the pH of the following:
DESCRIPTION OF ITEM
CATEGORY
GROUP
1.________________________
2.________________________
3.________________________
4.________________________
5.________________________
6.________________________
7.________________________
8.________________________
9.________________________
10._______________________
11._______________________
12._______________________
13._______________________
14._______________________
15._______________________
16._______________________
17._______________________
18._______________________
19._______________________
20._______________________
21._______________________
22._______________________
23._______________________
24._______________________
25._______________________
___________
___________
___________
___________
___________
___________
___________
___________
___________
___________
___________
___________
___________
___________
___________
___________
___________
___________
___________
___________
___________
___________
___________
___________
___________
KLMNOP
KLMNOP
KLMNOP
KLMNOP
KLMNOP
KLMNOP
KLMNOP
KLMNOP
KLMNOP
KLMNOP
KLMNOP
KLMNOP
KLMNOP
KLMNOP
KLMNOP
KLMNOP
KLMNOP
KLMNOP
KLMNOP
KLMNOP
KLMNOP
KLMNOP
KLMNOP
KLMNOP
KLMNOP
acid, base
or neutral
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
Explain: Each group will explain to the class what their results were.
a.
b.
c.
d.
e.
f.
Which samples were acidic?
Which was the most acidic?
Which samples were basic?
Which sample was the most basic?
What samples required special handling?
What trends did you discover? (i.e. cleaning solutions were ….)
Elaborate: (To be completed in the next class as homework)
a. Based on your findings, what was the concentration of hydronium
ions in your most acidic sample?
b. Based on your findings, what was the concentration of hydroxide
ions in your most basic sample?
c. What was the difference in hydronium ion concentration between
your most acidic and least acidic samples?
d. What was the difference in hydronium ion concentration between
your most basic and least basic samples?
Evaluation: What did you learn from this lab in the following areas:
1. What is pH? pOH?
2. What safety precautions would you put into place if you were doing
this lab again?
3. Write a quiz question that will reflect what you learned from this lab.