Question 1

What are the common reactions of acids with metals?

Accepted Answer

In the Edexcel Lower Secondary Chemistry curriculum, acids typically react with metals to produce a salt and hydrogen gas. For example, when hydrochloric acid reacts with zinc, it forms zinc chloride and hydrogen gas. This reaction is represented by the equation: Zn + 2HCl → ZnCl2 + H2.

Question 2

How do acids react with metal carbonates?

Accepted Answer

Acids react with metal carbonates to produce a salt, water, and carbon dioxide gas. For instance, when hydrochloric acid reacts with calcium carbonate, it forms calcium chloride, water, and carbon dioxide. The chemical equation for this reaction is: CaCO3 + 2HCl → CaCl2 + H2O + CO2.

Question 3

What happens when acids react with bases?

Accepted Answer

When acids react with bases, they undergo a neutralization reaction to form a salt and water. For example, when sulfuric acid reacts with sodium hydroxide, it produces sodium sulfate and water. This reaction can be represented by the equation: H2SO4 + 2NaOH → Na2SO4 + 2H2O.

Question 4

Can you explain the reaction of acids with metal oxides?

Accepted Answer

Acids react with metal oxides to form a salt and water. This type of reaction is similar to the reaction of acids with bases. For example, when hydrochloric acid reacts with copper(II) oxide, it forms copper(II) chloride and water: CuO + 2HCl → CuCl2 + H2O.

Question 5

Why do acids react with metals, bases, and carbonates?

Accepted Answer

Acids react with metals, bases, and carbonates because they are proton donors and seek to neutralize or balance their charge. In these reactions, acids donate protons (H+ ions) to form new compounds, such as salts, while releasing gases like hydrogen or carbon dioxide, depending on the reactants involved. This fundamental concept is a key part of the Edexcel Lower Secondary Science curriculum.

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