Metals Reacting with Water & Acids
2 guided lessons · 18 checks · 2. Inorganic Chemistry → Reactivity Series
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Reaction with water
The chemistry of metals is studied by watching how they react with water and acids, and the observations place each metal in a reactivity series. With cold water the spread is dramatic: potassium reacts violently, sodium quickly, lithium and calcium less strongly, while magnesium barely stirs in water but reacts rapidly with steam. Zinc and iron react only slowly with steam, and copper shows no reaction at all.
What you know already
From Group 1 (Alkali Metals) you have already seen potassium and sodium react with water, and you know the reactivity series by name from the periodic table work. This note turns those reactions into a measuring tool: comparing how metals behave with cold water and with dilute acids, and using the vigour seen to place them in the order of reactivity.
Key points of understanding
- Potassium reacts violently with cold water and sodium reacts quickly.
- Lithium and calcium both react less strongly with cold water.
- Magnesium barely reacts in cold water, yet responds rapidly to steam.
- Zinc and iron react only slowly with steam, and copper shows no reaction.
- Calcium with water gives calcium hydroxide and hydrogen: Ca + 2H2O gives Ca(OH)2 + H2.
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1.Reaction with water
The chemistry of metals is studied by watching how they react with water and acids, and the observations place each metal in a reactivity series. With cold water the spread is dramatic: potassium reacts violently, sodium quickly, lithium and calcium less strongly, while magnesium barely stirs in water but reacts rapidly with steam. Zinc and iron react only slowly with steam, and copper shows no reaction at all.
Key points
- Potassium reacts violently with cold water and sodium reacts quickly.
- Lithium and calcium both react less strongly with cold water.
- Magnesium barely reacts in cold water, yet responds rapidly to steam.
Guided content from the SME authoring corpus — note rn_Kd76WccxD9ytSJJC, pinned at 6fb25fc02d1a · promoted SyllabAI/syllabai-resources e967e75f1339