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1Define solution.


2In a solution of sugar dissolved in ethanol, what is the solvent and what is the solute?


3A mole contains 2.06 x 1023 molecules of a given chemical.
A)True
B)False


4How do you calculate a molecule's molecular weight?


5How would you prepare one liter of a 10% (weight by volume) solution of KOH?


6How many grams of HCl (molecular weight = 36.5 g/mol) would you dissolve in water to make a 0.5 M HCl solution with a final volume of one liter?


7How many grams of CaCl2 (molecular weight = 111 g/mol) would you dissolve in water to make 500 mL of 0.3 M CaCl2?
A)150 g
B)66.6 g
C)33.3 g
D)16.7 g


8To prepare a solution of 0.4 M NaOH, how many mL of water would you add to 200 mL of 1.0 M NaOH?
A)200 mL
B)300 mL
C)400 mL
D)500 mL


9How would you prepare 500 mL of 0.75 M NaCl from a stock solution of 1 M NaCl?


10The total number of moles of solute in a solution changes when the solution is diluted.
A)True
B)False


11Pure water is an ionically neutral solution.
A)True
B)False


12As pH increases, how does the concentration of H+ change?


13The difference between a pH of 3 and a pH of 4 represents a ________-fold change in concentration of H+ ions.
A)one
B)ten
C)hundred
D)thousand


14________ are molecules that remove hydrogen ions from solution, whereas ________ are molecules that add hydrogen ions to a solution.


15What is the formula for pH?


16What are buffers?


17


Salt water is more acidic / basic than lemon juice.
18


Blood is more acidic / basic than ammonia.
Answer choices:
A)acidic
B)basic





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