Question

I need help identifying the type of reactions. Can anyone help?

Answer 1

Answer:

Reaction 5: Decomposition reaction.

Reaction 6: Single replacement reaction

Reaction 7: Combination reaction.

Reaction 8: Combustion reaction.

Explanation:

Reaction 5:    2KClO₃ → 2KCl + 3O₂.

• It is a decomposition reaction.

• A decomposition reaction is a type of chemical reaction in which a single compound breaks down into two or more elements or new compounds.

• In this reaction: potassium chlorate decomposes into two single components (potassium chloride and oxygen).
• So, it is a decomposition reaction.

Reaction 6: Zn + 2HCl → H₂ + ZnCl₂.

• It is a single replacement reaction.

• A single-replacement reaction, a single-displacement reaction, is a reaction by which one (or more) element(s) replaces an/other element(s) in a compound.
• It is most often occur if element is more reactive than the other, thus giving a more stable product.

• In this reaction, zinc metal (more active) displaces the hydrogen to form hydrogen gas and zinc chloride, a salt. Zinc reacts quickly with the acid to form bubbles of hydrogen.

Reaction 7: N₂O₅ + H₂O → 2HNO₃.

• It is a combination "synthesis" reaction.
• A synthesis reaction has two or more reactants and only one product.
• In this reaction, dinitrogen pentoxide reacts with water to produce nitric acid.
• So, it is considered as a synthetic "combination" reaction.

Reaction 8: 2C₂H₆ + 7O₂ →  4CO₂ + 6H₂O.

• It is a combustion reaction.

• A combustion reaction is a reaction where hydrocarbon alkane is completely burned in oxygen to produce water and carbon dioxide.

• In this reaction 1.0 mole of ethane is burned to give 4.0 moles of carbon dioxide and 6.0 moles of water.

• So, it is considered as a combustion reaction.

Answer 2

Answer:

The type of reaction and explanation is attached in the picture