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GCSE

Name a test for a C=C double bond

Bromine water:- Turns colourless when mixed with a double bond (unsaturated)- Remains Orange-Brown when mixed with a C-C single bond (saturated)

Answered by Nathan L. • Chemistry tutor

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What is an emulsion? and give some examples

Emulsions are solutions of water and oil. With small droplets of one suspended in the other.Common examples of emulsions:- Mayonnaise, Milk (oil droplets in water)- Butter, Margarine (water droplet...

Answered by Nathan L. • Chemistry tutor

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How do you make calcium hydroxide (Ca(OH)2) from Calcium carbonate (CaCO3) and what are the equations.

Thermally decompose the calcium carbonate:CaCO₃-> CaO + CO₂Now mix the CaO with water:CaO + H₂O -> Ca(OH)₂

Answered by Nathan L. • Chemistry tutor

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Name the type of reaction that takes place when calcium carbonate is heated strongly?

This is called thermal decomposition. CaCO₃decomposes into calcium oxide (CaO) and Carbon Dioxide (CO₂).

Answered by Thomas G. • Chemistry tutor

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Describe a single covalent bond in terms of the electron distribution of the atoms involved.

Atoms involved in a covalent bond will share a pair of electrons in order to acheive a full outer shell in both atoms. Each atom will donate a single electron to the ...

Answered by Thomas M. • Chemistry tutor

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