Chemistry A-Level
cold water versus steam
What cold water versus steam means in Chemistry A-Level, as defined for AQA.
Definition of cold water versus steam
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Reference: AQA
Magnesium reacts only very slowly with cold water to give the hydroxide, but heated in steam it burns with a bright white flame to give the oxide instead.
Topics that use cold water versus steam
- Group 2, the alkaline earth metals (AQA A-Level)
Related terms
- alkalinity of the product
- barium sulfate precipitate
- First ionisation energy
- Group 2 sulfate solubility
- hydroxide solubility
- increasing reactivity down the group
- metallic bonding and melting point
- Shielding
Using cold water versus steam in the exam
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