BLD 313 FINAL REVIEW EXAM QUESTIONS AND ANSWERS
WITH COMPLETE SOLUTIONS VERIFIED
What needs to be measured in order to determine specific gravity?
Density
What is true about osmolality?
It is more accurate at measuring solution concentration than osmolarity.
Adding variable amount of diluent to fixed amount of stock in each tube is a way
of making which type of dilution?
Independent
To 9 ml of water, 1 ml of serum is added. What is the dilution factor?
10
A 2.0 M solution of NaCl is diluted 1/5. What is the final concentration?
0.4 mol/L
What is the molarity of a solution that contains 500 mg of NaCl in 50.0 ml? (MW:
Na=23.0, Cl-=35.5, H=1.0, Mg=24.3, H2O=18.0, N=14.0)
0.17M
How much stock HCl would you use to prepare 30 ml of a 20% v/v solution of
HCl?
6.0ml
How much 1.00 M stock of solution of NaCl would you need to prepare 500 ml of a
1.00% w/v solution? (MW: Na=23.0, Cl- =35.5)
, 86ml
What is the molarity of a 5.0% w/v solution of Mg Cl2 5H2O? (MW: Cl-=35.5, H=1.0,
Mg=24.3, H2O=18.0, N=14.0)
270mM
What is the normality of 1.0% w/v solution of NaOH (mw = 40.0)?
0.25N
What is the normality of a 1.0% w/v solution of H2SO4 (mv = 98)?
0.2N
A stock solution of HNO3 has a specific gravity of 1.42 and is 80% pure. How
many milliliters of this stock are needed to make 200 ml of a 10.0% w/v solution
HNO3? (MW: H=1.0, O=16.0, N=14.0)
17.5ml
A stock solution of HNO3 has a specific gravity of 1.575 and is 80% pure. How
many milliliters of this stock are needed to make 200 ml of a 10.0 N solution
HNO3? (MW: H=1.0, O=16.0, N=14.0)
100ml
5.0 ml of a 1.0% w/v solution of NaCl is added to 10 ml of a 2.0% w/v solution of
MgCl2. MgCl2 dissociates 100%. What is the final osmolality of this mixture?
(MW: Na=23.0, Cl-=35.5, H=1.0, Mg=24.3, H2O=18.0, N=14.0)
0.53
You have 100 ml of a 0.50 M solution of NaCl. To this, you add 500 mg of dry
NaCl. You now add water to the final volume of 1.0 liter. What is the molarity of
this final solution? MW: Na=23.0, Cl- =35.5.
WITH COMPLETE SOLUTIONS VERIFIED
What needs to be measured in order to determine specific gravity?
Density
What is true about osmolality?
It is more accurate at measuring solution concentration than osmolarity.
Adding variable amount of diluent to fixed amount of stock in each tube is a way
of making which type of dilution?
Independent
To 9 ml of water, 1 ml of serum is added. What is the dilution factor?
10
A 2.0 M solution of NaCl is diluted 1/5. What is the final concentration?
0.4 mol/L
What is the molarity of a solution that contains 500 mg of NaCl in 50.0 ml? (MW:
Na=23.0, Cl-=35.5, H=1.0, Mg=24.3, H2O=18.0, N=14.0)
0.17M
How much stock HCl would you use to prepare 30 ml of a 20% v/v solution of
HCl?
6.0ml
How much 1.00 M stock of solution of NaCl would you need to prepare 500 ml of a
1.00% w/v solution? (MW: Na=23.0, Cl- =35.5)
, 86ml
What is the molarity of a 5.0% w/v solution of Mg Cl2 5H2O? (MW: Cl-=35.5, H=1.0,
Mg=24.3, H2O=18.0, N=14.0)
270mM
What is the normality of 1.0% w/v solution of NaOH (mw = 40.0)?
0.25N
What is the normality of a 1.0% w/v solution of H2SO4 (mv = 98)?
0.2N
A stock solution of HNO3 has a specific gravity of 1.42 and is 80% pure. How
many milliliters of this stock are needed to make 200 ml of a 10.0% w/v solution
HNO3? (MW: H=1.0, O=16.0, N=14.0)
17.5ml
A stock solution of HNO3 has a specific gravity of 1.575 and is 80% pure. How
many milliliters of this stock are needed to make 200 ml of a 10.0 N solution
HNO3? (MW: H=1.0, O=16.0, N=14.0)
100ml
5.0 ml of a 1.0% w/v solution of NaCl is added to 10 ml of a 2.0% w/v solution of
MgCl2. MgCl2 dissociates 100%. What is the final osmolality of this mixture?
(MW: Na=23.0, Cl-=35.5, H=1.0, Mg=24.3, H2O=18.0, N=14.0)
0.53
You have 100 ml of a 0.50 M solution of NaCl. To this, you add 500 mg of dry
NaCl. You now add water to the final volume of 1.0 liter. What is the molarity of
this final solution? MW: Na=23.0, Cl- =35.5.
