Standardize
a NaOH solution by titration (laboratory)
Two sections:
· Part I: Fill in the blank - terms; definition will be given,
you provide the term name
· Part II: Problem Solving
Sample problems!
1. A solution
is prepared by mixing 1.0 grams of benzene (C6H6)
in 100 g of water to create a solution total volume of 100 ml. Calculate
the molarity, mass percent, and molality of benzene in the solution.
(0.128M, 0.99%, 0.128m)
2. 10 grams of
salt (NaCl) is added to 100 mL of water. What are the new freezing
and boiling points? (Kb = .51 oC kg/mol, Kf
= 1.86 oC kg/mol) (-6.3 deg C, 102 deg C)
3. Calculate the
molarity of a solution that contains 1.22 grams of hemoglobin (MW
= 68300) in 165 ml of solution. (1.08 X 10-4 M)
4. How much solute
was used to make a 40% solution of NaCl in H2O if 150 grams
of water were used? (100. g NaCl)
5. Find the molality
of a solution of 85 g KNO3 and 125 g H2O. (6.73
m)
6. What is the
freezing point of a solution containing 202 g C12H22O11
and 750 g of H2O? (-1.46 deg C)
7. What is the
boiling point of a solution containing 110 g CaSO4 and
234 g H2O? (103.59 deg C)
8. How many grams
of Al(OH)3 are needed to make 300 mL of a 0.43M solution?
(10.1 g)
9. How many moles
of PbSO4 are needed to make 200 mL of a 3.7M solution?
(0.74 mol)
10. What is the
volume, in mL, of a 1.7M solution that contains water and 284 grams
of C6H12O6? (930 mL)
