Gr 9 NATURAL SCIENCES: CH 2.6 SUM Reactions of Acids with Bases: Part I
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Questions and Answers

What is the product of the reaction between a non-metal oxide and water?

  • Neutral solution with pH = 7
  • Basic solution with pH > 7
  • Acidic solution with pH < 7 (correct)
  • No reaction occurs

    • What is the general pH range of metal oxide solutions in water?

  • pH = 7
  • pH < 7
  • pH depends on the metal
  • pH > 7 (correct)

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

  • A salt and water (correct)
  • No reaction occurs
  • An acid and a base
  • A base and water

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

    <p>To measure the pH of the solution</p> Signup and view all the answers

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

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

    What is the general formula for metal hydroxides formed from Group 1 metals?

    <p>MOH</p> Signup and view all the answers

    What is the reaction between a non-metal oxide and water called?

    <p>Formation of acid rain</p> Signup and view all the answers

    What is the purpose of identifying the reactants in writing a reaction equation?

    <p>To start writing the equation</p> Signup and view all the answers

    What is the formula for magnesium oxide?

    <p>MgO</p> Signup and view all the answers

    What is the general formula for metal carbonates formed from Group 1 metals?

    <p>M₂CO₃</p> Signup and view all the answers

    What is the pH range of strong acids?

    <p>pH 1-3</p> Signup and view all the answers

    What is the universal indicator used for?

    <p>To measure the pH of a solution</p> Signup and view all the answers

    What is the pH of a neutral solution?

    <p>pH = 7</p> Signup and view all the answers

    What happens when an acid and a base react?

    <p>They neutralise each other</p> Signup and view all the answers

    What is the general equation for a neutralisation reaction?

    <p>acid + base → salt + water</p> Signup and view all the answers

    What is the product of a neutralisation reaction?

    <p>Typically water and a salt</p> Signup and view all the answers

    What should be done when handling laboratory acids?

    <p>Handle them with care</p> Signup and view all the answers

    What is formed when non-metal oxides dissolve in water?

    <p>An acid</p> Signup and view all the answers

    What is the pH range of weak acids?

    <p>pH 4-6</p> Signup and view all the answers

    What is the color of the universal indicator when vinegar is added?

    <p>Red or orange</p> Signup and view all the answers

    What is the general word equation for the reaction of an acid with a metal hydroxide?

    <p>acid + metal hydroxide → salt + water</p> Signup and view all the answers

    What is the product of the reaction between hydrochloric acid and sodium hydroxide?

    <p>sodium chloride</p> Signup and view all the answers

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

    <p>to measure the pH of the reaction</p> Signup and view all the answers

    What is formed when calcium carbonate reacts with hydrochloric acid?

    <p>carbon dioxide</p> Signup and view all the answers

    What is the general equation for the reaction of an acid with a metal carbonate?

    <p>acid + metal carbonate → salt + water + carbon dioxide</p> Signup and view all the answers

    What is the purpose of the steps to write reaction equations?

    <p>all of the above</p> Signup and view all the answers

    What is the reactant in the reaction between hydrochloric acid and potassium hydroxide?

    <p>potassium hydroxide</p> Signup and view all the answers

    What is the product of the reaction between sulfuric acid and potassium hydroxide?

    <p>potassium sulfate</p> Signup and view all the answers

    What is the role of the metal hydroxide in the reaction?

    <p>to react with the acid</p> Signup and view all the answers

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

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

    What is the main component of shells of marine organisms?

    <p>Calcium carbonate</p> Signup and view all the answers

    What is the process of adding lime to soil to increase its pH and provide a source of calcium?

    <p>Liming</p> Signup and view all the answers

    What is the common use of calcium carbonate in swimming pools?

    <p>To adjust the pH levels</p> Signup and view all the answers

    What is the form of calcium carbonate used in agriculture to neutralize acidic soil?

    <p>Agricultural lime</p> Signup and view all the answers

    What is the name of the caves in South Africa that contain limestone formations?

    <p>Cango Caves</p> Signup and view all the answers

    What is the nutritional source of calcium provided by dark green leafy vegetables?

    <p>Calcium</p> Signup and view all the answers

    What is the common use of calcium carbonate in construction?

    <p>As a building material</p> Signup and view all the answers

    What is the form of calcium carbonate used in adhesives and paints?

    <p>Calcium carbonate</p> Signup and view all the answers

    What is the reason why calcium carbonate is added to swimming pools?

    <p>To make the water more basic</p> Signup and view all the answers

    What is the purpose of calcium carbonate in agriculture?

    <p>To provide a source of calcium</p> Signup and view all the answers

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

    <p>A salt and water are formed.</p> Signup and view all the answers

    What type of solutions are formed when metal oxides dissolve in water?

    <p>Basic solutions</p> Signup and view all the answers

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

    <p>To measure the pH of a solution</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</p> Signup and view all the answers

    What is the result of the reaction between a non-metal oxide and water?

    <p>An acidic solution is formed</p> Signup and view all the answers

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

    <p>Acid + metal oxide → salt + water</p> Signup and view all the answers

    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</p> Signup and view all the answers

    What is the general characteristic of metal hydroxides?

    <p>They are basic and form solutions with pH values above 7</p> Signup and view all the answers

    What is the role of the metal oxide in the reaction with an acid?

    <p>It acts as a base</p> Signup and view all the answers

    What is the general formula for metal oxides formed from Group 2 metals?

    <p>MO</p> Signup and view all the answers

    What is the pH of a solution that is strongly basic?

    <p>Greater than 7</p> Signup and view all the answers

    What is the result of mixing a strong acid and a strong base?

    <p>A neutral solution</p> Signup and view all the answers

    Which of the following acids is commonly used in a laboratory?

    <p>All of the above</p> Signup and view all the answers

    What is the color of the universal indicator when a strong base is added?

    <p>Blue or green</p> Signup and view all the answers

    What is formed when a non-metal oxide dissolves in water?

    <p>An acid</p> Signup and view all the answers

    What is the pH range of a weak acid?

    <p>4-6</p> Signup and view all the answers

    What is the result of a neutralisation reaction?

    <p>A neutral solution and a salt</p> Signup and view all the answers

    What is the purpose of using a universal indicator?

    <p>To measure the pH of a solution</p> Signup and view all the answers

    What is the general equation for a neutralisation reaction?

    <p>acid + base → salt + water</p> Signup and view all the answers

    Why is it important to handle laboratory acids with care?

    <p>Because they are corrosive</p> Signup and view all the answers

    What is the primary component of the shells of marine organisms?

    <p>Calcium carbonate</p> Signup and view all the answers

    What is the purpose of adding calcium carbonate to swimming pools?

    <p>To increase the pH level</p> Signup and view all the answers

    What is the term for the process of adding lime to soil to increase its pH?

    <p>Liming</p> Signup and view all the answers

    What is the common use of calcium carbonate in construction?

    <p>As a building material</p> Signup and view all the answers

    What is the form of calcium carbonate used in agriculture to neutralize acidic soil?

    <p>Agricultural lime</p> Signup and view all the answers

    What is the nutritional source of calcium provided by dark green leafy vegetables?

    <p>Calcium carbonate</p> Signup and view all the answers

    What is the name of the caves in South Africa that contain limestone formations?

    <p>Cango Caves</p> Signup and view all the answers

    What is the common use of calcium carbonate in adhesives and paints?

    <p>As a filler</p> Signup and view all the answers

    What is the primary source of calcium in bird eggshells?

    <p>Calcium carbonate</p> Signup and view all the answers

    What is the role of calcium carbonate in the exoskeletons of crustaceans?

    <p>Provides structural support</p> Signup and view all the answers

    What is the general equation for the reaction of an acid with a metal hydroxide?

    <p>acid + metal hydroxide → salt + water</p> Signup and view all the answers

    What is the purpose of the steps to write reaction equations?

    <p>To identify the reactants and predict the products</p> Signup and view all the answers

    What is the reactant in the reaction between hydrochloric acid and potassium hydroxide?

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

    What is formed when calcium carbonate reacts with hydrochloric acid?

    <p>Calcium chloride, water, and carbon dioxide</p> Signup and view all the answers

    What is the role of the metal hydroxide in the reaction?

    <p>To react with the acid to form a salt and water</p> Signup and view all the answers

    What is the product of the reaction between sulfuric acid and potassium hydroxide?

    <p>Potassium sulfate and water</p> Signup and view all the answers

    What is the general equation for the reaction of an acid with a metal carbonate?

    <p>acid + metal carbonate → salt + water + carbon dioxide</p> Signup and view all the answers

    What is the purpose of identifying the reactants in writing a reaction equation?

    <p>To identify the reactants and predict the products</p> Signup and view all the answers

    What is formed when an acid reacts with a metal carbonate?

    <p>Salt, water, and carbon dioxide</p> Signup and view all the answers

    What is the purpose of balancing the chemical equation?

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

    What is the primary purpose of using a universal indicator in an experiment involving acids and bases?

    <p>To identify the pH of the solution</p> Signup and view all the answers

    Which of the following is a characteristic of a strong base?

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

    What is the result of mixing a strong acid with a weak base?

    <p>A acidic solution is formed</p> Signup and view all the answers

    What is the purpose of handling laboratory acids with care?

    <p>They are highly corrosive</p> Signup and view all the answers

    What is the product of the reaction between a non-metal oxide and water?

    <p>An acid and water</p> Signup and view all the answers

    Which of the following is an example of a weak acid?

    <p>Carbonic acid (H₂CO₃)</p> Signup and view all the answers

    What is the general equation for the reaction between an acid and a base?

    <p>Acid + Base → Salt + Water</p> Signup and view all the answers

    What is the pH of a solution that is midway between a strong acid and a strong base?

    <p>pH 7</p> Signup and view all the answers

    What is the purpose of using a pH scale?

    <p>To measure the acidity or basicity of a solution</p> Signup and view all the answers

    What is the result of mixing a weak acid with a strong base?

    <p>A basic solution is formed</p> Signup and view all the answers

    What is the difference between the reaction of an acid with a metal hydroxide and the reaction of an acid with a metal carbonate?

    <p>The reaction with a metal hydroxide produces a gas, while the reaction with a metal carbonate does not</p> Signup and view all the answers

    What is the purpose of the steps to write reaction equations?

    <p>To ensure the correct sequence of reactants and products</p> Signup and view all the answers

    What is the role of the metal hydroxide in the reaction with an acid?

    <p>It acts as a base</p> Signup and view all the answers

    What is the general equation for the reaction of an acid with a metal carbonate?

    <p>acid + metal carbonate → salt + water + carbon dioxide</p> Signup and view all the answers

    What is the product of the reaction between hydrochloric acid and calcium carbonate?

    <p>calcium chloride and carbon dioxide</p> Signup and view all the answers

    What is the difference between a metal hydroxide and a metal carbonate?

    <p>A metal hydroxide reacts with acids to form a salt and water, while a metal carbonate reacts with acids to form a salt, water, and carbon dioxide</p> Signup and view all the answers

    What is the purpose of using a universal indicator in an experiment?

    <p>To measure the pH of a solution</p> Signup and view all the answers

    What is the general word equation for the reaction of an acid with a metal hydroxide?

    <p>acid + metal hydroxide → salt + water</p> Signup and view all the answers

    What is the role of the acid in the reaction with a metal hydroxide?

    <p>It acts as an acid</p> Signup and view all the answers

    What is the general characteristic of metal hydroxides?

    <p>They are basic</p> Signup and view all the answers

    What is the reason for the difference in pH values of metal oxides and non-metal oxides when they dissolve in water?

    <p>The difference in electronegativity between metal and non-metal atoms</p> Signup and view all the answers

    What is the characteristic that metal oxides and metal hydroxides have in common when they dissolve in water?

    <p>They are both basic and form solutions with pH values above 7</p> Signup and view all the answers

    What is the purpose of the universal indicator paper in the experiment involving the reaction of magnesium oxide with hydrochloric acid?

    <p>To measure the pH of the solution during the reaction</p> Signup and view all the answers

    What is the primary source of calcium carbonate in the shells of marine organisms?

    <p>Biological precipitation from the organism's body</p> Signup and view all the answers

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

    <p>Acid + metal oxide → salt + water</p> Signup and view all the answers

    What is the main reason why calcium carbonate is added to swimming pools?

    <p>To reduce the acidity of the pool</p> Signup and view all the answers

    What is the primary application of calcium carbonate in agriculture?

    <p>Soil pH adjustment</p> Signup and view all the answers

    What is the characteristic of metal hydroxides that makes them basic?

    <p>They contain a hydroxide anion (OH⁻)</p> Signup and view all the answers

    What is the purpose of identifying the reactants in writing a reaction equation?

    <p>To predict the products of the reaction</p> Signup and view all the answers

    What is the primary source of calcium in dark green leafy vegetables?

    <p>Calcium carbonate</p> Signup and view all the answers

    What is the general word equation for the reaction of an acid with a metal carbonate?

    <p>Acid + metal carbonate → salt + water + carbon dioxide</p> Signup and view all the answers

    What is the primary component of the exoskeletons of crustaceans?

    <p>Calcium carbonate</p> Signup and view all the answers

    What is the geological process that forms limestone formations?

    <p>Precipitation of calcium carbonate</p> Signup and view all the answers

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

    <p>The formation of a salt and water</p> Signup and view all the answers

    What is the primary use of calcium carbonate in construction?

    <p>Cement production</p> Signup and view all the answers

    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</p> Signup and view all the answers

    What is the characteristic of metal oxides that makes them basic?

    <p>They have a high pH value when dissolved in water</p> Signup and view all the answers

    What is the term for the process of adding calcium carbonate to soil to increase its pH?

    <p>Liming</p> Signup and view all the answers

    What is the primary reason why calcium carbonate is used in adhesives and paints?

    <p>To adjust their pH</p> Signup and view all the answers

    What is the term for the caves in South Africa that contain limestone formations?

    <p>Cango Caves</p> Signup and view all the answers

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