Laboratory Activity 4.3.3: Studying the reaction of alkali metals with halogens |
Problem statement: How do lithium, sodium and potassium differ in reactivity with chlorine gas?
Hypothesis: Reactivity increases for the reaction between alkali metals and chlorine gas when going down Group 1
Variable:
» | Fixed variable : Concentration of chlorine gas | |
» | Manipulated variable : Type of alkali metal | |
» | Responding variable : Reactivity of the metal with chlorine gas |
Material: » Lithium » Sodium » Potassium » Filter paper |
Apparatus: » Gas jar with cover » Gas jar spoon » Small knife » Test tube » Forceps » Bunsen burner |
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► | Lithium, sodium and potassium react with chlorine to produce a white metallic chloride.
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► | All Group 1 metals react with chlorine to form a metallic chloride. | |
► | The reactivity increases down the Group 1. | |
► | The hypothesis is accepted. |
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