Chemistry Lab properties of acids and bases

4/2/14
Period: 1st
Chemistry

Sour Acids and Bitter Bases
Purpose:
The purpose of this lab was to observe the different reactions formed between various acids and bases with the aid of indicators.

Equipment:
1. Safety goggles.
2. Droppers.
3. Red Litmus paper.
4. Blue Litmus paper.
5. pH paper.
6. Well plate.
7. Micro spatula.

Materials:
1. Zinc.
2. Magnesium.
3. Iron.
4. Copper.
5. HCL.
6. HC₂H₃O₂.
7. NaOH.
8. Phenolphthalein.

Procedure:
Part A:

1. Add five drops of HCL, HC₂H₃O₂, and NaOH to different depressions in the well plate.
2. Place a drop of each solution onto a piece of red litmus paper and record observations.
3. Place a drop of each solution onto a piece of blue litmus paper and record observations.
4. Place a drop of each solution onto a piece of pH paper and record observations
5. Add one drop of Phenolphthalein to each solution and record observations.
Procedure continued:
Part B:
6. After the well plate is cleaned, add a piece of zinc, magnesium, iron, and copper to four separate depressions in the well plate.
7. To each depression add enough HCL to cover the metals. Observe and record results.
8. Clean the well plate and place the same metals in four separate depressions and add enough HC₂H₃O₂ to cover the metal. Observe and record results.

Observations:
DATA TABLE 1 Reactions with Indicators

Solution
Red litmus
Blue litmus pH paper
Phenolphthalein
1.0 M HCL
No rxn
Turned Red
1
No rxn
1.0 M HC₂H₃O₂
No rxn
Turned Red
2
No rxn
0.5 M NaOH
Turned Blue
Turned Blue
11
Turned Pink

DATA TABLE 2 Speed of Reactions With Metals

Metal
1.0 M HCL
1.0 M HC₂H₃O₂
Zinc
Blobbing
No rxn
Magnesium
Fizzing
Bubbling
Iron
No rxn
No rxn
Copper
No rxn
No rxn

Observations continued: In my observations, in data table 1, the only solution that reacted with the red litmus paper was NaOH. All three solutions reacted with the blue