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Understanding Solutions, Suspensions, and Colloids, Exams of Nursing

A.T. Still University of Health Sciences (ATSU)Nursing

A comprehensive overview of the different types of mixtures, including solutions, suspensions, and colloids. It covers key concepts such as solubility, solvents, solutes, the tyndall effect, brownian motion, and the classification of mixtures as either homogeneous or heterogeneous. The document also includes formative assessment questions to test the reader's understanding of these topics. The information presented in this document could be useful for students studying chemistry, physics, or related fields, as it covers fundamental principles that are essential for understanding the behavior of different types of mixtures and their applications in various contexts.

Typology: Exams

2023/2024

Available from 08/22/2024

DrShirleyAurora
DrShirleyAurora 🇺🇸

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Chapter 12
Soluble -
Capable of being dissolved.
- Ex. sugar is described as "soluble in water"
- Eventually after dissolving, the sugar molecules become uniformly distributed among the water
molecules
Solution -
A homogeneous mixture of two or more substances uniformly dispersed throughout a single
phase.
- smaller than 1 nm
Solvent -
The substance in which the solute dissolves.
-The dissolving medium in a solution
Solute -
The substance dissolved in the solution.
- Generally designated as the component of a solution that is of lesser quantity
Types of Solutions -
- Solutions may exist as gases, liquids, or solids
- Some solute-solvent combinations for solutions
- Gas/gas, gas/liquid, liquid/liquid, liquid/solid, solid/liquid, solid/solid
Suspension -
A mixture in which particles can be seen and easily separated by settling or filtration.
- larger than 1000 nm
Colloids -
Particles that are intermediate in size between those in solutions and suspensions .
- 1 nm and 1000 nm in diameter
Classes of Colloids -
- sol
- gel
- liquid emulsion
- foam
- solid aerosol
- liquid aerosol
- solid emulsion
Tyndall Effect -
This occurs when light is scattered by colloidal particles dispersed in a transparent medium.
- Ex. Headlights
Brownian Motion -
1
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Chapter 12

Soluble - Capable of being dissolved.

  • Ex. sugar is described as "soluble in water"
  • Eventually after dissolving, the sugar molecules become uniformly distributed among the water molecules Solution - A homogeneous mixture of two or more substances uniformly dispersed throughout a single phase.
  • smaller than 1 nm Solvent - The substance in which the solute dissolves. -The dissolving medium in a solution Solute - The substance dissolved in the solution.
  • Generally designated as the component of a solution that is of lesser quantity Types of Solutions -
    • Solutions may exist as gases, liquids, or solids
  • Some solute-solvent combinations for solutions
  • Gas/gas, gas/liquid, liquid/liquid, liquid/solid, solid/liquid, solid/solid Suspension - A mixture in which particles can be seen and easily separated by settling or filtration.
  • larger than 1000 nm Colloids - Particles that are intermediate in size between those in solutions and suspensions.
  • 1 nm and 1000 nm in diameter Classes of Colloids -
    • sol
  • gel
  • liquid emulsion
  • foam
  • solid aerosol
  • liquid aerosol
  • solid emulsion Tyndall Effect - This occurs when light is scattered by colloidal particles dispersed in a transparent medium.
  • Ex. Headlights Brownian Motion -

Motion that is due to the collisions of rapidly moving molecules Electrolyte - A substance that dissolves in water to give a solution that conducts electric current

  • Ex. Sodium chloride, NaCl Nonelectrolyte - A substance that dissolves in water to give a solution that DOES NOT conduct an electric current.
  • Ex. Sugar Formative Assessment Questions - Classify the following as either a heterogeneous or homogeneous mixture. Explain your answer. a. Orange Juice b. Tap Water - A. Orange juice is heterogeneous because it is not uniform throughout, and there are different parts of the drink that you can see, such as the pulp, etc. B. Tap Water is homogeneous because it is uniform throughout and you cannot see different parts of the liquid. a. What are substances called whose water solutions conduct electricity. b. Why does a salt solution conduct electricity? c. Why does a sugar-water solution not conduct electricity? - A.) aqueous solution electrolyte B.) solution contains ions C.) no ions Describe one way to prove that a mixture of sugar and water is a solution and that a mixture of sand and water is not a solutution. - Sand in water can settle/ filtered out, proving its not a solution. Dissolved sugar cannot be removed from water through settling or filtration; the water must be evaporated Name the solute-solvent in the following: a) 14 karat gold b) corn syrup c) carbonated water - a) gold-solvent silver+ copper-solute b) solvent- water solute- sugar c) solute- CO solvent- H2O Alloy - a combination; a mixture of two or more metals