Laboratory Activity 4.3.2: Studying the reaction of alkali metals with water |
Problem statement: How do lithium, sodium and potassium differ in reactivity with water?
Hypothesis: Reactivity increases for the reaction between alkali metals and water when going down Group 1
Variable:
» | Fixed variable : Water | |
» | Manipulated variable : Type of alkali metal | |
» | Responding variable : Reactivity of the metal with water |
Material: » Lithium » Sodium » Potassium » Phenolphthalein indicator » Water » Filter paper |
Apparatus: » Test tube » Forceps » Water trough » Small knife |
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► | Lithium, sodium and potassium react with water to produce an alkali and hydrogen gas.
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► | The reactivity of metals increases down Group 1. |
► | All Group 1 metals react with water to form an alkali and hydrogen gas. | |
► | The reactivity increases down the Group 1. | |
► | The hypothesis is accepted. |
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What is the operational definition for the reactivity of Group 1 elements?
ReplyDeleteWhat is inferens from the observation
ReplyDeletewhere is your observation?
ReplyDelete