Chemical reactions

Give the symbol for reversible change.

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What is a reductant/reducing agent?

A substance that adds electrons to or removes oxygen from another substance.

What is an oxidant/oxidizing agent?

A substance that removes electrons from or adds oxygen to another substance

What is an 'oxidation number'?

Another word for oxidation state.

That is the reducing agent in this reaction? 2Fe2O3 + 3C → 4Fe + 3CO2

Carbon

What is being oxidized in this reaction? Fe2O3 + 3CO → 2Fe + 3CO2

Carbon monoxide

What does 'hydrated' mean?

Having water as part of their structure.

What is being reduced in this reaction? 2Fe2O3 + 3C → 4Fe + 3CO2

Iron

What is the oxidizing agent in this reaction? Fe2O3 + 3CO → 2Fe + 3CO2

Iron

What are reversible reactions?

Reactions which can go in either direction.

Why is this a redox reaction? NaCl -> 2Na +Cl2

Sodium ions gains electrons (RIG). Chloride ions loses electrons (OIL).

What is an 'oxidation state'?

The Roman numeral after the name of an element in a compound.

Define 'oxidation'.

The gain of oxygen or Loss of electrons (OIL)

Define 'reduction'.

The loss of oxygen or Gain of electrons (RIG)

What does the 'water of crystallisation' mean?

The water in a salt

Define a redox reaction.

When the reduction and oxidation have taken place together in one reaction.

Define 'anhydrous'.

Without water