Mixtures
What is a suspension?
liquid mixture in which particles can be seen and easily separated by settling or filtration
What color does an acid turn blue litmus paper?
Red
This is a compound that turns red litmus paper blue.
Base
When a solid compound dissolves in water it does what?
Each of its particles becomes surrounded by water molecules.
Ionic and polar compounds do what in water, because water molecules are polar?
dissolve
How is a solute different from a solvent in a solution?
the solute is present in a smaller amount.
Double Points!
Why are acids described as corrosive?
Wear away at other materials
What color of litmus paper turn in a solution of baking soda?
Blue because it is a base.
Weak tea is an example of a
dilute solution
This compounds break up into individual neutral particles when dissolved in a solvent?
Molecular
How can you tell whether an unknown solution is salt in water or sugar in water?
by testing the electrical conductivity of the solution.
You can find the pH of a substance by using what?
litmus indicator
For triple points.
In a water solution, how do acids differ from bases?
Acids form hydrogen ions (H+), while bases form hydroxide ions (OH-).
When sugar are mixed into a cup of water, sugar is the
solute
In water, bases form what
hydroxide atoms
Give one way to increase the solubility of sugar in water?
heat the water
To help identify rocks, geologists use the properties of
acids
What does a neutralization reaction produce?
water and salt
How would a solute affect the boiling point of water?
The water will boil at a higher temperature.
At the same concentration, strong acids produce more _________ than weak acids.
hydrogen ions
What is a colloid?
A mixture containing particles that are too smallt obe seen easily, but are large enough to scatter a light beam.
In your stomach, this acid helps with digestion.
Hydrochloric acid
When the pH is high, the concentration of hydrogen ions is
Low
Type of solvent, pressure, time and ____________ are factors that affect the solubility of a substances.
temperature
Four times the points.
Describe the differences among solutions, colloids, and suspensions.
They are different types of mixtures. A solution, such as salt water, has the same properties throughout and contains solute particles that are too small to see. A suspension, such as pepper floating in water, does not have the same properties throughout and contains particles that are large enough to see. A colloid, such as milk, contains particles that are larger than the particles in a solution but smaller than the particles in a suspension. The colloid are still too small to be seen easily, but are large enough to scatter a light beam.