Four Reaction Types

Also called

chemical reactions · types of chemical reactions · combination reaction · decomposition reaction · displacement reaction · double displacement reaction · magnesium ribbon burns · magnesium oxide · calcium carbonate heated · quicklime · thermal decomposition · iron nail in copper sulphate · barium sulphate precipitate · precipitation reaction · balanced chemical equation · रासायनिक अभिक्रिया · संयोजन अभिक्रिया · वियोजन अभिक्रिया · विस्थापन अभिक्रिया

Topics

• In a combination reaction two or more substances join to form a single product: 2Mg + O₂ → 2MgO.
• Magnesium ribbon burns in air with a dazzling flame and leaves a pale powder, magnesium oxide.
• In a decomposition reaction one substance breaks into two or more: CaCO₃ → CaO + CO₂ on heating.
• Heating limestone gives quicklime and carbon dioxide; heat drives it, so it is a thermal decomposition.
• In a displacement reaction a more reactive element pushes a less reactive one out of its compound.
• Fe + CuSO₄ → FeSO₄ + Cu: the nail turns brown with copper and the blue solution fades to pale green.
• In a double displacement reaction two compounds exchange ions: Na₂SO₄ + BaCl₂ → BaSO₄ + 2NaCl.
• Barium sulphate is insoluble, so it settles as a white precipitate: a precipitation reaction.
• A balanced equation has the same number of atoms of each element on both sides, so mass is conserved.

About this model

A GLB file of about 472 KB, shown in Lably's 3D viewer and, on a phone, placed in your room with AR. Credit: Model, science and animation: Lably (built procedurally with three.js; no downloaded meshes). | CC BY 4.0. Original geometry and animation made for Lably.

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