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Chemistry
GCSE

Why doesn't the concentration of products or reactants change when a reaction is at dynamic equilibrium?

At dynamic equilibrium in a closed system (for example, in the Haber process to make ammonia), both the forward and backward reactions continue to occur. However, both reactions happen at the same rate...

RA
Answered by Rose A. Chemistry tutor
4737 Views

What is an atom made up of?

An atom is made up of electrons, protons and neutrons. Electrons have a negative charge (-1), protons have a postive charge (+1) and neutrons have a neutral charge.

Atoms must have a neut...

ML
3280 Views

What are polymers and why are they useful?

Polymers are large molecules made from lots of repeating units called monomers.

Plastic bags, waterproof coatings on clothes and wound dressings can all be made from poly...

EM
Answered by Eleanor M. Chemistry tutor
5733 Views

What is the difference between an alkene and an alkane?

Both alkanes and alkenes are hydrocarbons, which means they only contain carbon and hydrogen atoms.

Alkanes are saturated hydrocarbo...

EM
Answered by Eleanor M. Chemistry tutor
12740 Views

A student titrates 25.00 cm3 of hydrochloric acid with 28.60 cm3 sodium hydroxide solution of concentration 0.200 moles per dm3. The equation for the reaction is: HCl + NaOH to NaCl + H2O. Calculate the concentration of the hydrochloric acid.

From the equation given in the question we can see that one mole of hydrochloric acid (HCl) reacts with one mole of sodium hydroxide (NaOH). 

The first thing to do is to work out the numb...

HA
Answered by Hannah A. Chemistry tutor
21392 Views

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