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Worksheets8 CI CH 3 Complete
Total questions: 30
Worksheet time: 15mins
2) When a few spoonfuls of sugar are mixed into a cup of water, sugar is the
acid
base
solvent.
solute.
3) mixture with particles that are too small to be seen but are large enough to scatter a light
solution
colloid.
suspension
base
4) A liquid mixture in which particles can be seen and easily separated
solution
suspension
solvent
solute
5) When a solid compound dissolves in water,
it breaks up into individual crystals.
it always conducts electricity.
its particles surround individual water molecules.
each of its particles becomes surrounded by water molecules.
6) How can a scientist safely tell whether an unknown solution is salt or sugar in water?
by tasting the solution
by testing the electrical conductivity of the solution
by smelling the solution
by filtering the solution
7) When a solute is added to a solvent, the freezing point of the solution is
higher than the freezing point of either substance alone.
the same as the freezing point of the solute.
lower than the freezing point of either substance alone.
the same as the freezing point of the solvent
8)How would a solute affect the boiling point of water?
The water will boil at a lower temperature.
The water will not boil.
The water will boil at a higher temperature.
The boiling point will be the same as the freezing point.
1) Weak tea is an example of a
dilute solution.
suspension.
concentrated solution.
solvent.
2) When you add so much solute that no more dissolves, you have a
saturated solution.
neutralization.
unsaturated solution.
suspension
3) A measure of how well a solute can dissolve in a solvent at a given temperature is
saturation point.
acidity.
solubility
concentration.
4) What does it mean if a compound has a solubility of 15 g in 100 g of water at 0°C?
100 g of the compound will dissolve in 15 g of water at 0°C.
The compound will not dissolve until 15 g of it are present.
15 g of the compound will dissolve in 100 g of water at 0°C.
The compound will dissolve only if the water temp is 0°C.
5) If 2 unidentified solids with same texture & color but different solubilities ->
they are the same substance.
they have different melting points.
they are different substances.
their solubilities will be the same if the water temp riased
6) What is one way to increase the solubility of sugar in water?
Heat the water.
Increase the amount of sugar.
Chill the water.
Decrease the amount of water.
7) What happens to the solubility of potassium nitrate (KNO3) as the temperature rises?
The solubility increases.
The solubility decreases.
1) Which is a characteristic property of acids?
They turn blue litmus paper red.
They turn red litmus paper blue.
They taste bitter.
They do not react with metals.
2) Acids are described as corrosive because they
turn litmus blue.
“eat away” at other materials.
taste bitter.
feel slippery.
3) Bases feel slippery and taste _________
sour
bitter
4) Which is a likely use for a base?
as a vitamin in your food
making foods taste sour
etching metals for printing
making soaps and detergents
1) In a water solution, how do acids differ from bases?
Acids form hydrogen ions, bases form hydroxide ions
Acids form salts, bust bases do not.
Acids turn litmus blue, while bases turn litmus red.
Hydrogen ions remain dissolved, but hydroxide ions do not.
2) In water, bases form
hydroxide ions.
hydrogen ions.
hydrogen gas.
oxide ions.
3) mixing equal amounts of a solution of a strong acid and a solution of a weak acid creates a
strong acid will have a lower pH.
two solutions will have the same pH.
strong acid will have a higher pH.
weak acid will produce more hydrogen ions.
4) The pH scale measures
the strength of an acid.
the concentration of hydrogen ions.
the strength of hydrogen ions.
the concentration of an acid.
5) You can find the pH of a substance by using
plain paper.
a thermometer.
litmus indicator.
a conductivity tester.
6) Normal rainfall is slightly acidic, which means its pH must be
less than 2.
between 2 and 4.
between 5 and 7.
between 7 and 9.
7) Neutralization is a reaction between a(n)
acid and a base.
acid and a metal.
base and a salt.
salt and water.
8) What does a neutralization reaction produce?
acids
bases
water and a salt
carbonated water
1) The process that breaks down complex molecules of food into smaller particles is called
neutralization
conduction
digestion
solution
2) How does chemical digestion differ from mechanical digestion?
Chemical digestion does not involve the stomach.
Chemical digestion only occurs in the small intestine.
Chemical digestion is limited to grinding / mashing of food.
Chemical digestion requires enzymes.
3) How is pH important during digestion?
Digestion needs a constant pH to take place.
Enzymes react best with acids.
Different foods have different pH values.
Different enzymes work best at different pH values.
5) Describe the changes in pH that occur as food passes through your digestive system.
mouth 2 stomach 7 intestines 8
mouth 7 stomach 2 intestines 8
mouth 2 stomach 8 intestines 7
mouth 8 stomach 2 intestines 7
