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Act. 2.2.1 Flame Test

This document describes a flame test lab activity where students will determine the characteristic colors that metal salts emit when burned. Students will place small amounts of calcium chloride, sodium chloride, potassium chloride, and copper(II) sulfate on watch glasses, add acid and alcohol, and observe the color of the flame when lit with a match. The colors produced can be used to identify the metal elements present based on the structure of their atoms. Students are asked questions about why different colors are emitted and what particles are responsible for producing the colored light.

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823 views1 page

Act. 2.2.1 Flame Test

This document describes a flame test lab activity where students will determine the characteristic colors that metal salts emit when burned. Students will place small amounts of calcium chloride, sodium chloride, potassium chloride, and copper(II) sulfate on watch glasses, add acid and alcohol, and observe the color of the flame when lit with a match. The colors produced can be used to identify the metal elements present based on the structure of their atoms. Students are asked questions about why different colors are emitted and what particles are responsible for producing the colored light.

Uploaded by

JilyAh Bella
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
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Cagayan de Oro National High School

8th – 2nd Sts., Nazareth, Cagayan de Oro City

Activity 1.2.1
The Flame Test

Name: __________________________________________ Date: ___________________


Section: ________________________________________ Teacher: _______________________

I. OBJECTIVE:
 Determine the characteristic colors that metal salts emit; and
 Relate the colors emitted by metal salts to the structure of the atom.

II. MATERIALS:
0.50 grams of each of the following metal salts:
Calcium chloride 6 pcs watch glass
Sodium chloride 1 pc 10 mL graduated cylinder
Copper(II) sulfate 1 pc dropper
Potassium chloride safety match
100 mL 95% ethanol
100 mL Hydrochloric acid

III. PROCEDURE:
1. Place each metal salt on a watch glass and add 2 to 3 drops of 3 M hydrochloric acid.
2. Pour about 3-5 mL or enough alcohol to cover the size of a 1-peso coin in the first watch glass. Light a
match and observe the color of the flame.
3. Repeat procedure No. 2 for each salt. Observe the color of the flame.
4. Write your observation in the table below.

Table 1: Color of the flame of metal salts


Metal salt tested Element Producing Color Color of the flame
Calcium Chloride Boron
Sodium Chloride Calcium
Potassium Chloride Sodium
Copper(II) sulfate Potassium
Boric Acid Copper

Questions:
1. Why do you think there are different colors emitted?
2. What particles in the heated compounds are responsible for the production of the colored light?
3. How did the scientist explain the relationship between the colors observed and the structure of the
atom?

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