Show:
Solutions
Water
Concentration
Acids & Bases
pH Scale
100
Define "solution."
A mixture of two or more substances that are uniform at the molecular level.
100
What is another "name" for water?
The universal solvent
100
Define "solubility."
Solubility describes the amount of a substance that can be dissolved in a given amount of solvent.
100
What are the properties of acids?
taste sour, increase H+ ions in solution, pH less than 7, turn blue litmus paper red
100
What does pH measure?
pH measures the % of hydrogen or hydronium ions in a substance.
200
What are the two parts of a solution?
The solvent and the solute.
200
Why is water a good solvent?
Because it is polar.
200
A solute is dissolved when . . .
it is totally and equally dispersed through the solvent.
200
What are the properties of bases?
taste bitter, feel slippery, increase OH- ions in solution, pH greater than 7, turn red litmus paper blue
200
What is the range of the pH scale?
The pH scales goes from 0 to 14.
300
Define "alloy."
An alloy is a solution made of two or more solids. An example is steel.
300
Name two items that are insoluble in water.
Sand, rock, glass, metals, plastics.
300
When is a solution saturated?
When no more solute can be dissolved in it.
300
List some common acids.
Lemon, citrus fruits, tea, coffee, soda pop
300
Describe what is at 0, what is at 7, and what is at 14 on the pH scale?
0 is the strongest acids, 7 is neutral, and 14 is the strongest bases.
400
What is another word that means “uniform” or “evenly mixed”?
Homologous
400
Give an example of a gas that can be dissolved in water.
Oxygen, carbon dioxide.
400
When is a solution supersaturated?
When it has more solute dissolved in it than it can normally hold, so some undissolves and returns to its solid state.
400
List some common bases.
Soap, baking soda, lye
400
What are two materials that can be used to measure pH?
Litmus paper or purple cabbage juice indicator fluid.
500
What is the word that describes a mixture that is not uniform, and is not a solution?
A heterogenous mixture
500
Name a liquid that is insoluble in water. What does it do instead?
Oil. It floats in a layer on the top of water, and will not mix in.
500
What is the formula for finding concentration?
(The solute / the total mass of the solution) x 100%
500
Where are acids important in your body?
Stomach acids help to dissolve your foods so you can digest them.
500
What is the pH of your blood and your spit?
Close to neutral.