Chemistry Reference
In-Depth Information
Try the review questions and check your answers before moving on to
Lesson 9-2.
Lesson 9-1 Review
1.
Polar solutes tend to be soluble in _______________ solvents.
2.
Polar solutes tend to be _______________ in non-polar solvents.
3.
The ________________ of a solution is measured in moles of solute
per liters of solution.
4.
The ________________ of a solution is measured in moles of solute
per kilograms of solvent.
5.
The symbol “M” is used to indicate the __________ of a solution.
6.
The symbol “m” is used to indicate the __________ of a solution.
7.
Determine the molarity of a 3.0 L solution containing 2.0 moles of
solute.
8.
How many grams of NaOH would be required to produce a 1.25 M
solution with a volume of 2.00 liters?
9.
What would be the volume of a 2.0 M solution made with 8.0 moles
of NaCl?
10. How many kilograms of water would be required to produce a 2.0
molal solution made with 111 g of CaCl
2
?
Lesson 9-2: Properties of Acids and Bases
Many students have two very common misconceptions about acids and
bases. First, they believe that all acids are extremely corrosive, capable of
dissolving a person the way the acids that they see in movies are. Second,
they believe that all bases are harmless, because they can be used to neu-
tralize deadly acids. The truth is that not all acids are hazardous and not all
bases are safe. All of the acids and bases that you encounter in the chemis-
try lab should be handled with care, especially if you are unsure of how
strong they are.
Some acids are quite harmless, and most of us swallow acidic substances
on a day-to-day basis. Soda and seltzer water contain carbonic acid. Or-
ange juice, oranges, lemons, and limes contain citric acid. Vinegar contains
acetic acid. So, not all acids are dangerous.
