G7 Term2 IS Chapter 2.2
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Questions and Answers

What is the term for a substance that dissolves in a liquid?

  • Solute (correct)
  • Soluble
  • Solvent
  • Solution

    • Water is often referred to as a universal solvent because it can dissolve many different substances.

    True

    What is formed when a solute dissolves in a solvent?

    Solution

    In a sugar solution, sugar is the __________ and water is the __________.

    <p>solute, solvent</p> Signup and view all the answers

    Match the following substances with their solubility in water:

    <p>Sugar = Soluble Sand = Insoluble Table salt = Soluble Oil = Insoluble</p> Signup and view all the answers

    Which of the following substances are classified as insoluble in water?

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

    All substances can dissolve in water.

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

    What term is used to describe substances that do not dissolve in water?

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

    Water does not dissolve everything; some substances are __________.

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

    Match the following terms with their definitions:

    <p>Soluble = Able to dissolve in water Insoluble = Not able to dissolve in water</p> Signup and view all the answers

    What happens to the rate of dissolving when you stir a solution?

    <p>It speeds up.</p> Signup and view all the answers

    What happens to the rate of dissolving when the solution is stirred?

    <p>It increases.</p> Signup and view all the answers

    The crystal sugar that dissolves faster is the whole piece of sugar.

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

    What is typically added to drinks to enhance sweetness instead of granulated sugar?

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

    What is the solute used in Joe's experiment?

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

    When stirring a solution, the independent variable is the ______.

    <p>stirring speed</p> Signup and view all the answers

    The ______ dissolving occurs faster when the temperature of the solvent is higher.

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

    Match each factor with its effect on the rate of dissolving:

    <p>Stirring = Increases rate Higher temperature = Increases rate Larger surface area = Increases rate Lower temperature = Decreases rate</p> Signup and view all the answers

    What happens when more sugar is added to a fixed amount of water beyond its solubility limit?

    <p>Some sugar remains undissolved.</p> Signup and view all the answers

    Sugar has a higher solubility in water than table salt and copper(II) sulfate.

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

    What determines the limit of a solute that can dissolve in a solvent?

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

    Different substances have different __________ in water.

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

    Match the following substances with their relative solubility in water:

    <p>Sugar = High solubility Table salt = Moderate solubility Copper(II) sulfate = Low solubility Silica = Insoluble</p> Signup and view all the answers

    What happens to the solubility of substance X as the temperature of the water increases?

    <p>It increases</p> Signup and view all the answers

    At 30°C, approximately 40 grams of substance X dissolve in 100 cm³ of water.

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

    How many grams of substance X can dissolve in water at 50°C?

    <p>45 grams</p> Signup and view all the answers

    At 70°C, the solubility of substance X is approximately __________ grams.

    <p>55</p> Signup and view all the answers

    Match the temperature to the corresponding solubility of substance X:

    <p>20°C = 20 grams 30°C = 20 grams 40°C = 30 grams 50°C = 45 grams 60°C = 50 grams 70°C = 55 grams</p> Signup and view all the answers

    Which substance has the highest solubility in water at 25°C?

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

    Copper(II) Sulphate is more soluble in water than table salt at 25°C.

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

    What is the solubility of sugar in water at 25°C?

    <p>211 g</p> Signup and view all the answers

    The solubility of table salt in 100 cm³ of water at 25°C is __________.

    <p>37 g</p> Signup and view all the answers

    Match each substance to its respective solubility at 25°C.

    <p>Sugar = 211 g Table salt = 37 g Copper(II) Sulphate = 22 g</p> Signup and view all the answers

    What affects the solubility of a substance in water?

    <p>The temperature of the solvent</p> Signup and view all the answers

    Which of the following factors does NOT increase the rate of dissolving?

    <p>Using smaller pieces of solute</p> Signup and view all the answers

    Solubility is the unlimited amount of a solute that can dissolve in a given amount of solvent.

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

    Define solubility.

    <p>The limited amount of a solute that can dissolve in a given amount of solvent.</p> Signup and view all the answers

    Water can dissolve all substances without exception.

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

    What is the universal solvent and why is it referred to as such?

    <p>Water; it is referred to as a universal solvent because it can dissolve many different substances.</p> Signup and view all the answers

    The solubility of most substances in water __________ as the temperature increases.

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

    Match the terms related to solubility with their descriptions:

    <p>Solute = Substance being dissolved Solvent = Substance doing the dissolving Insoluble = Substance that does not dissolve in water Solubility = Amount of solute that can dissolve in solvent</p> Signup and view all the answers

    The rate of dissolving is affected by stirring, temperature, and the surface area of the __________.

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

    Match the following actions with their effect on the rate of dissolving:

    <p>Stirring the solution = Increases the rate Heating the solvent = Increases the rate Reducing solute size = Increases the rate Using a solid solute = May decrease the rate</p> Signup and view all the answers

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