Hydrogen gas is produced when dilute hydrochloric acid is added to a reactive metal.
Balanced molecular equation of sodim metal with hydrochloric acid:
2Na(s) + 2HCl(aq) → 2NaCl(aq) + H₂(g).
Ionic equation: 2Na(s) + 2H⁺(aq) + 2Cl⁻(aq) → 2Na⁺ + 2Cl⁻(aq) + H₂(g).
Net ionic equation: 2Na(s) + 2H⁺(aq) → 2Na⁺(aq) + H₂(g).
Sodium is oxidized from oxidation number 0 (Na) to oxidation number +1, hydrogen is reduced from oxidation number +1 to oxidation number 0 (hydrogen gas H₂).
Another example:
Balanced chemical equation: Zn(s) + 2HCl(aq) → ZnCl₂(aq) + H₂(g)
Word equation: zinc + hydrochloric acid → zinc chloride + hydrogen gas
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If calcium carbonate decomposes, the product of the reaction would be calcium oxide and carbon dioxide.
Balanced chemical reaction: CaCO₃(s) → CaO(s) + CO₂(g).
CaCO₃ is calcium carbonate.
CaO is calcium oxide
CO₂ is carbon dioxide or carbon(IV) oxide
Chemical decomposition is the separation of a single chemical compound (in this example calcium carbonate) into its two or more simpler compounds (in this example calcium oxide and carbon dioxide).
Decomposition is reaction where one substance is broken down into two or more simpler substances. Heat is usually necessary to this type of reaction.
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Answer:
True.
Explanation:
Dissolution changes the properties of molecules or atom.
Answer:
1. 24.7g of Br2
2. 19.9g of HCl
Explanation:Please see attachment for explanation
Strawberry, bread, bananas/ lemonade, milk, water/ nitrogen, oxygen, carbon dioxide
