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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?
What is the component of a solution that is present in a larger amount?
Which of the following is an example of a solid in liquid solution?
What is the term used to describe a solution that has a relatively small amount of solute dissolved in it?
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What happens when no more solute can be dissolved in a solution?
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Which of the following is an example of a gas in liquid solution?
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What is the term used to describe a solution that has a relatively large amount of solute dissolved in it?
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What is the purpose of heating the solution in the activity?
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What is the component of a solution that is dissolved in the solvent?
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What can be observed when a beam of light is directed through a solution?
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What is a characteristic of a solution?
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What is the composition of brass?
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What is a characteristic of an alloy?
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What is the result of filtering a solution?
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What is a characteristic of a suspension?
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What is the difference between a solution and a suspension?
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What is a characteristic of a colloidal solution?
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What is the main difference between an alloy and a solution?
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What is the reason for the Tyndall effect observed in a dense forest?
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What is a characteristic of a suspension?
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What is the term for a mixture in which the solute particles do not dissolve but remain suspended throughout the bulk of the medium?
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What is the reason for the stability of a colloid?
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What is the process used to separate colloidal particles?
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What is the characteristic of a colloid that allows it to scatter a beam of light?
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What is the difference between a suspension and a colloid?
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What is the Tyndall effect observed in?
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What is the term for a mixture in which the solute particles dissolve completely?
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What is the primary difference between water and cooking oil?
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Who is credited with establishing an experimentally useful definition of an element?
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What is the term for a change in chemical composition?
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What is a characteristic of metals?
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Who was the first scientist to use the term element?
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What is the result of a chemical reaction?
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What happens during burning?
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What is an example of a chemical property?
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What is the primary way to distinguish between elements?
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What is a characteristic of a compound?
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Which of the following is an example of a mixture?
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What is the purpose of filtration in the process of making tea?
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What is the solute in a solution of sugar and water?
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What can be concluded about a substance that is insoluble in water?
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Which of the following is an example of a solvent?
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What can be inferred about a substance that is soluble in hot water but insoluble in cold water?
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What is the purpose of the residue in the process of making tea?
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What is the relationship between the solubility of a substance and its temperature?
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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.