Top answers

Chemistry
GCSE

Write a balanced chemical symbol equation for a reaction between Potassium and Water, including state symbols?

2K(s) + 2H2O(l) = 2KOH(aq) + H2(g)

Potassium (K) is a group 1 metal, which is a solid.

Water (H2O) reacts with Potassium to form Potassium H...

JD
Answered by Joe D. Chemistry tutor
144775 Views

How can I check if my reaction equations are correct?

The basic principle about chemical reactions is that whatever goes in one end, will undoubtedly come out the other!

The simplest way to make sure your reactions are correct is to count wh...

AK
Answered by Alexia K. Chemistry tutor
3499 Views

Explain why chlorine (Cl2) is a gas at room temperature, but sodium chloride (NaCl) is a solid at room temperature.

The melting/boiling point of a substance determines what state of matter it takes at a certain temperature.

In Cl2 there are covalent bonds between the atoms forming simple molecules. The...

LW
Answered by Lily W. Chemistry tutor
168359 Views

Explain what a hydrocarbon is, and suggest two properties of hydrocarbons that leave a fractioning column near the top.

A hydrocarbon is a molecule that contains only hydrogen and carbon atoms.

Any two of the follwing properties are suitable answers:

Low boiling points, low viscosities or hig...

AP
5095 Views

How is poly(ethene) formed?

Poly(ethene) is formed when several monomers of ethene (an alkene) are joined together. Ethene can take part in this type of reaction as it is has a double bond (it's unsaturated) which opens up to all...

EA
Answered by Emily A. Chemistry tutor
27369 Views

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