Scribd
Upload
661 views4 pages

Evaporation Experiment Experiment Aim:: STOP

This document describes an evaporation experiment to separate salt from salt water. Students will heat a salt water solution until the water evaporates, leaving behind salt. They will observe that salt crystals form in the evaporating basin. When a watch glass is held above, droplets of water will condense on the underside, showing that evaporation and condensation are opposite processes. The goal is to understand evaporation and how it can be used to separate substances. Safety precautions are outlined for working with the Bunsen burner and hot equipment.

Uploaded by

api-352881693
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
661 views4 pages

Evaporation Experiment Experiment Aim:: STOP

This document describes an evaporation experiment to separate salt from salt water. Students will heat a salt water solution until the water evaporates, leaving behind salt. They will observe that salt crystals form in the evaporating basin. When a watch glass is held above, droplets of water will condense on the underside, showing that evaporation and condensation are opposite processes. The goal is to understand evaporation and how it can be used to separate substances. Safety precautions are outlined for working with the Bunsen burner and hot equipment.

Uploaded by

api-352881693
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
You are on page 1/ 4

EVAPORATION EXPERIMENT Name:

Experiment Aim:

 Separate a salt water solution by evaporating the water using a Bunsen burner

Hypothesis:

Materials:

• Bunsen burner
• Salt solution
• Heatproof mat
• Evaporating basin
• Tripod
• Gauze mat
• Safety glasses
 Wooden tongs
 Watch glass

SAFETY:
 Yellow flame whenever Bunsen burner is not in use
 Safety glasses
 Long hair tied up
 Tripod, gauze and evaporation dish will get very hot!! DO NOT TOUCH.
 Do not stir solution with pen

Method
1. Choose an area on the bench to work at and then collect materials:
Person 1: Tripod, Gauze mat, heat proof mat, 2 safety glasses, wooden tongs, Bunsen
burner
Person 2: Evaporation basin, matches, watch glass, and solution

2. Set up workspace like seen on the smartboard (DO NOT turn on gas yet)
*STOP*
3. Sit down at table and watch teacher demonstration on how to light a Bunsen burner
4. Slide Bunsen burner out from underneath the tripod and light it carefully (YELLOW
SAFETY FLAME)
5. Open the bunsen burner hole to change the flame to the BLUE HEATING FLAME
*STOP*
6. Carefully slide the Bunsen burner back underneath the tripod.
7. Heat the salt water solution until almost all the water has disappeared.
8. Whilst heating the solution hold a watch glass above the evaporating dish with your
wooden tongs and observe what happens
9. When the water in the solution has almost all disappeared turn the bunsen burner off
10. Leave the solution to cool down. Do not touch anything ! It will be hot.
11. Write observations in the box below
12. Complete questions

OBSERVATIONS
EVAPORATION OBSERVAITON WORKSHEET
Name:

1. Describe what you saw as the water evaporated?

2. What happened when you held the watch glass over the evaporation dish?

Why do you think this happened?

3. Why is it important to stop heating when the water is just about gone?

4. Where has the water gone? EXPLAIN

5. Define the term ‘Evaporation’

6. Distillation is another separation method. Explain how distillation works.


7. Explain how is distillation different from evaporation?

8. Can you list some examples of evaporation in nature?


_

Conclusion: (what have you learned from today’s activity?)

You might also like