Identifying Mixtures and Solutions
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Questions and Answers

What is the term used to describe a solution that has the maximum amount of solute dissolved in it?

  • Dilute
  • Unsaturated
  • Saturated (correct)
  • Concentrated

    • What is the component of a solution that is present in a larger amount?

  • Solvent (correct)
  • Solute
  • Mixture
  • Solution

    • Which of the following is an example of a solid in liquid solution?

  • A solution of sugar in water (correct)
  • A solution of iodine in alcohol
  • Air
  • Aerated drinks like soda water

    • What is the term used to describe a solution that has a relatively small amount of solute dissolved in it?

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

    What happens when no more solute can be dissolved in a solution?

    <p>The solution becomes saturated</p> Signup and view all the answers

    Which of the following is an example of a gas in liquid solution?

    <p>Aerated drinks like soda water</p> Signup and view all the answers

    What is the term used to describe a solution that has a relatively large amount of solute dissolved in it?

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

    What is the purpose of heating the solution in the activity?

    <p>To dissolve more solute</p> Signup and view all the answers

    What is the component of a solution that is dissolved in the solvent?

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

    What can be observed when a beam of light is directed through a solution?

    <p>The path of the beam of light is not visible</p> Signup and view all the answers

    What is a characteristic of a solution?

    <p>Particles are evenly distributed</p> Signup and view all the answers

    What is the composition of brass?

    <p>Approximately 30% zinc and 70% copper</p> Signup and view all the answers

    What is a characteristic of an alloy?

    <p>It shows the properties of its constituents</p> Signup and view all the answers

    What is the result of filtering a solution?

    <p>No residue is left on the filter paper</p> Signup and view all the answers

    What is a characteristic of a suspension?

    <p>Particles settle at the bottom</p> Signup and view all the answers

    What is the difference between a solution and a suspension?

    <p>A solution has particles that are evenly distributed, while a suspension has particles that settle</p> Signup and view all the answers

    What is a characteristic of a colloidal solution?

    <p>Particles are evenly distributed</p> Signup and view all the answers

    What is the main difference between an alloy and a solution?

    <p>An alloy is a heterogeneous mixture, while a solution is a homogeneous mixture</p> Signup and view all the answers

    What is the reason for the Tyndall effect observed in a dense forest?

    <p>The scattering of light by the mist containing tiny droplets of water</p> Signup and view all the answers

    What is a characteristic of a suspension?

    <p>The particles are visible to the naked eye</p> Signup and view all the answers

    What is the term for a mixture in which the solute particles do not dissolve but remain suspended throughout the bulk of the medium?

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

    What is the reason for the stability of a colloid?

    <p>The particles do not settle down when left undisturbed</p> Signup and view all the answers

    What is the process used to separate colloidal particles?

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

    What is the characteristic of a colloid that allows it to scatter a beam of light?

    <p>The particles are big enough to scatter a beam of light</p> Signup and view all the answers

    What is the difference between a suspension and a colloid?

    <p>The size of the particles</p> Signup and view all the answers

    What is the Tyndall effect observed in?

    <p>A dense forest</p> Signup and view all the answers

    What is the term for a mixture in which the solute particles dissolve completely?

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

    What is the primary difference between water and cooking oil?

    <p>Odour and inflammability</p> Signup and view all the answers

    Who is credited with establishing an experimentally useful definition of an element?

    <p>Antoine Laurent Lavoisier</p> Signup and view all the answers

    What is the term for a change in chemical composition?

    <p>Chemical reaction</p> Signup and view all the answers

    What is a characteristic of metals?

    <p>They have a lustre</p> Signup and view all the answers

    Who was the first scientist to use the term element?

    <p>Robert Boyle</p> Signup and view all the answers

    What is the result of a chemical reaction?

    <p>New substances with different properties</p> Signup and view all the answers

    What happens during burning?

    <p>Both physical and chemical change</p> Signup and view all the answers

    What is an example of a chemical property?

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

    What is the primary way to distinguish between elements?

    <p>Through their chemical properties</p> Signup and view all the answers

    What is a characteristic of a compound?

    <p>It exhibits different properties from its constituent elements.</p> Signup and view all the answers

    Which of the following is an example of a mixture?

    <p>Sodium chloride and ammonium chloride.</p> Signup and view all the answers

    What is the purpose of filtration in the process of making tea?

    <p>To separate the tea leaves from the liquid.</p> Signup and view all the answers

    What is the solute in a solution of sugar and water?

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

    What can be concluded about a substance that is insoluble in water?

    <p>It does not dissolve in water.</p> Signup and view all the answers

    Which of the following is an example of a solvent?

    <p>Water in the process of making tea.</p> Signup and view all the answers

    What can be inferred about a substance that is soluble in hot water but insoluble in cold water?

    <p>It is more soluble in hot water than in cold water.</p> Signup and view all the answers

    What is the purpose of the residue in the process of making tea?

    <p>It is the leftover tea leaves.</p> Signup and view all the answers

    What is the relationship between the solubility of a substance and its temperature?

    <p>Solubility may increase or decrease with temperature.</p> Signup and view all the answers

    Study Notes

    Types of Mixtures

    • Solid solutions (alloys): mixtures of two or more metals or a metal and a non-metal, cannot be separated into their components by physical methods, e.g., brass (30% zinc, 70% copper)
    • Gaseous solutions (air): homogeneous mixtures, e.g., carbon dioxide (gas) in water (liquid)
    • Liquid solutions: e.g., sugar in water, iodine in alcohol

    Characteristics of Solutions

    • Homogeneous: particles evenly distributed throughout
    • Solvent: component present in larger amount, dissolves the other component
    • Solute: component present in lesser amount, gets dissolved in the solvent
    • Examples: sugar in water, iodine in alcohol, carbon dioxide in water

    Suspensions

    • Non-homogeneous systems, e.g., group C's mixture
    • Solids dispersed in liquids, particles do not dissolve
    • Particles are visible to the naked eye
    • Properties: heterogeneous mixture, particles can be seen, Tyndall effect can be observed

    Colloids

    • Big enough to scatter a beam of light, making its path visible
    • Do not settle down when left undisturbed, stable
    • Cannot be separated from the mixture by filtration
    • Require centrifugation for separation

    Elements

    • Basic form of matter that cannot be broken down into simpler substances by chemical reactions
    • Definition by Antoine Laurent Lavoisier (1743–94)
    • Examples: metals, non-metals, and metalloids
    • Properties of metals: lustre, silvery-grey or golden-yellow colour, conduct heat and electricity, ductile, malleable, sonorous

    Chemical Changes

    • Burning is a chemical change
    • Chemical change brings change in chemical properties of matter, resulting in new substances
    • Distinguishable from physical changes

    Separation Techniques

    • Various techniques for separating mixtures, e.g., filtration, centrifugation, sedimentation

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    Description

    This quiz helps you distinguish between mixtures and solutions by observing their properties. Learn how to identify homogeneous and heterogeneous mixtures and characterize solutions.

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