Gr 9 NATURAL SCIENCES: 2.6 CH The general reaction of an acid with a metal oxide

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Questions and Answers

What is the reactant in the reaction of copper(II) oxide with hydrochloric acid that is an acid?

  • Water
  • Copper(II) chloride
  • Copper(II) oxide
  • Hydrochloric acid (correct)

What is the product formed when magnesium oxide reacts with hydrochloric acid?

  • Copper(II) chloride
  • Hydrochloric acid
  • Magnesium chloride (correct)
  • Magnesium oxide

What is the first step in writing a reaction equation?

  • Combine the reactants to predict the products
  • Balance the chemical equation
  • Write the word equation
  • Identify the reactants (correct)

What is the purpose of balancing a chemical equation?

<p>To ensure the number of atoms of each element is the same on both sides of the equation (C)</p> Signup and view all the answers

What is the common product formed in both the reaction of magnesium oxide with hydrochloric acid and the reaction of copper(II) oxide with hydrochloric acid?

<p>Water (A)</p> Signup and view all the answers

What is the pH range of a solution formed when a metal oxide is dissolved in water?

<p>pH &gt; 7 (B)</p> Signup and view all the answers

What is the product formed when a metal oxide reacts with an acid?

<p>A salt and water (D)</p> Signup and view all the answers

Which of the following is an example of a non-metal oxide?

<p>COâ‚‚ (C)</p> Signup and view all the answers

What is the purpose of using universal indicator paper in the experiment?

<p>To observe the pH changes during the reaction (B)</p> Signup and view all the answers

What type of reaction occurs when a metal oxide reacts with an acid?

<p>Acid-base reaction (B)</p> Signup and view all the answers

What is the chemical formula of magnesium chloride?

<p>MgCl2 (A)</p> Signup and view all the answers

Which of the following is NOT a step in writing a reaction equation?

<p>Determine the pH of the solution (D)</p> Signup and view all the answers

What is the reactant that is common in both the reaction of magnesium oxide with hydrochloric acid and the reaction of copper(II) oxide with hydrochloric acid?

<p>Hydrochloric acid (A)</p> Signup and view all the answers

What is the general characteristic of a solution formed when a metal oxide is dissolved in water?

<p>It has a pH value above 7. (C)</p> Signup and view all the answers

Why is balancing a chemical equation important?

<p>To ensure the number of atoms of each element is the same on both sides of the equation (A)</p> Signup and view all the answers

What type of oxide is copper(II) oxide?

<p>Metal oxide (B)</p> Signup and view all the answers

What is the type of reaction that occurs when a metal oxide reacts with an acid?

<p>Exchange reaction (D)</p> Signup and view all the answers

Which of the following is an example of a metal oxide?

<p>Liâ‚‚O (D)</p> Signup and view all the answers

What is the general formula for the reaction of a metal oxide with an acid?

<p>metal oxide + acid → salt + water (D)</p> Signup and view all the answers

What is the purpose of the experiment involving magnesium oxide and hydrochloric acid?

<p>To observe the reaction between a metal oxide and an acid (D)</p> Signup and view all the answers

What is the primary reason why metal oxides are basic in nature?

<p>Because they form solutions with pH values above 7 when dissolved in water (B)</p> Signup and view all the answers

What is the significance of using universal indicator paper in the experiment involving magnesium oxide and hydrochloric acid?

<p>To measure the pH of the reaction mixture (B)</p> Signup and view all the answers

Which of the following statements is true about non-metal oxides?

<p>They are acidic and form solutions with pH values below 7 (A)</p> Signup and view all the answers

What is the general pattern of the reaction between a metal oxide and an acid?

<p>Exchange reaction (C)</p> Signup and view all the answers

What is the purpose of the reaction between a metal oxide and an acid in the context of acid-base chemistry?

<p>To demonstrate the characteristic of metal oxides as bases (A)</p> Signup and view all the answers

What is the chemical significance of combining hydrochloric acid with magnesium oxide?

<p>Formation of a salt and water (C)</p> Signup and view all the answers

What is the underlying principle behind the reaction of copper(II) oxide with hydrochloric acid?

<p>Acid-base neutralization reaction (D)</p> Signup and view all the answers

What is the common feature of the reactants in both the reaction of magnesium oxide with hydrochloric acid and the reaction of copper(II) oxide with hydrochloric acid?

<p>Both are oxides (A)</p> Signup and view all the answers

What is the importance of balancing a chemical equation in the reaction of copper(II) oxide with hydrochloric acid?

<p>To ensure the number of atoms of each element is the same on both sides of the equation (C)</p> Signup and view all the answers

What is the primary purpose of writing a reaction equation?

<p>To predict the products of a reaction (B)</p> Signup and view all the answers

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