Zinc oxide and sulphuric acid
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Zinc sulfate is typically produced by reacting zinc oxide with sulfuric acid. The chemical equation for this reaction is: ZnO + H2SO4 -> ZnSO4 + H2O.
No, not all substances are chemically combined when mixed together. Some mixtures involve substances that are physically combined and can be separated by physical means, such as filtering or evaporation, without undergoing a chemical reaction.
Iron sulfate can be made by reacting iron metal with sulfuric acid. The balanced chemical equation for this reaction is 3 Fe + 4 H2SO4 → Fe2(SO4)3 + 4 H2.
Iron can react with substances like oxygen to form iron oxide (rust). It can also react with acids to form hydrogen gas and a salt. Iron can also react with water to form iron hydroxide.
You can make ammonium sulfate by reacting ammonia gas with sulfuric acid. The chemical equation for this reaction is 2NH3 + H2SO4 → (NH4)2SO4.
Mixtures don't chemically react with each other.