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Sulphide is a salt wear as sulfidee isnt

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It is balanced
Here's a breakdown:
Na, H2, P, O4 ==> Na, P, O4, H2

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It is a chemical change which is irreversible. you could displace the iron from iron oxide with aluminium, for example. However this would involve another chemical reaction and it, technically, is not reversing. It is simply salvaging.

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BBC ( bitesize)

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Carbon dioxide + Water

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Non metal Oxides are always acidic while metal oxides are alkali.

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The products after thermal decomposition of Calcium Carbonate are Calcium oxide and Carbon Dioxide.
CaCO3 --> CaO + CO2

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Acid + Alkali ==> Salt + Water
Sodium hydroxide + Hydrochloric acid ==> Sodium chloric + water

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What are the product after a thermal decomposition of CalciumCarbonate

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What are the product after a thermal decomposition of CalciumCarbonate

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What is the difference between a metal and a non metal oxide?

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What is the difference between a metal and a non metal oxide?

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What are the reactants and products of neutralisation? 

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What are the reactants and products of neutralisation? 

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The products would be metal compound (such as a nitrate or sulphate and water as the hydrogen in the acid reacts with the oxygen in the metal oxide

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We use catalysts to increase the rate of a reaction or make a reaction happen

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What are the products of a metal oxide and acid

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What are the products of a metal oxide and acid

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Anything below Hydrogen in the reactivity series will not react with Dilute Acids.

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4Fe+3O2->2Fe2O3

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A sulphate ends in SO4 while a sulfide simply ends in S

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Sodium Hydroxide +Hydrogen
2Na+2H2O->2NaOH + H2

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What is the balanced symbol equation for rusting?

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What is the balanced symbol equation for rusting?

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Because it speeds up the reaction, it can be used over and over as it does not change chemically, it usually reduces the activation energy.

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Because there isn't enough oxygen for the carbon in fuels to react normally, so it makes carbon monoxide (CO)

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What is the difference between a sulphate and a sulfide

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What is the difference between a sulphate and a sulfide

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Why is hydrogen included in the reactivity series?

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Why is hydrogen included in the reactivity series?

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What are the products of the reaction with sodium and water

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What are the products of the reaction with sodium and water

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Why do we use catalysts for some reactions?

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Why do we use catalysts for some reactions?