Physical Science Chapter 7 Test Review
- What is a suspension?
- A liquid mixture in which particles can be seen and easily separated by settling or filtration
- What is a saturated solution?
- When you add so much solute that no more will dissolve
- How do we increase the solubility of sugar in water?
- Heat the water
- How would a solute affect the boiling point of water?
- Raise the boiling point (raise the temperature)
- How is a solute different from a solvent in a solution?
- The solute is present in a smaller amount
- How can we safely tell whether an unknown solution contains salt or sugar?
- By testing the electrical conductivity of the solution
- What would weak tea be an example of?
- Dilute solution
- What happens to the freezing point of the solution when a solute is added to a solvent?
- Freezing point changes. It is lower than the freezing temperature of ether substance alone
- What type of change does an acid make to litmus paper?
- Acids make blue litmus paper turn red
- How do acids differ from bases in water solution?
- Acids produce hydrogen ions (H+) and bases produce hydroxide ions (OH-)
- Why are acids considered to be corrosive?
- They “eat away” at other materials
- What do bases form in water?
- Hydroxide ions (OH-)
- What does the pH scale measure?
- The concentration of hydrogen ions
- What is neutralization?
- A reaction between an acid and a base
- What does a neutralization reaction produce?
- A salt and water
- When a few spoonfuls of sugar are added to a cup of water, what is the sugar?
- The Solute
- What happens to a solid compound when it is dissolved in water?
- Each of its particles are surrounded by water molecules
- What is solubility?
- The measure of how well a solute can dissolve in a solution at a given temperature
- What is a colloid?
- A mixture containing particles that are too small to be seen easily, but are large enough to scatter a light beam
- What is a solution?
- A mixture that appears uniform throughout & whose particles cannot easily be seen
- What is an unsaturated solution?
- A solution to which you can continue to add solute
- What is an acid?
- A compound that tastes sour and reacts with some metals
- What is a base?
- A compound that turns litmus blue and is often found in soaps and detergents
- What does a high pH tell you?
- The concentration of hydrogen ions is low
- What happens to the pH in a neutralization reaction?
- The pH changes to a value that is closer to neural
- What is the universal solvent?
- Water
- What is a salt?
- An ionic compound produced from the neutralization of an acid and a base
- Be able to read a pH chart and use that information to answer questions. (Sample chart on page 245 in textbook.)
Essay:
- Describe how solutions of acids and bases differ in terms of particles. How do the differences relate to the properties of acids and bases?
- Describe the differences among solutions, colloids, and suspensions.
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