BLD313 FINAL EXAM QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS VERIFIED
How will you prepare 120g of 35.% (w/w) sodium hydroxide (NaOH) aqueous
solution?
a. Dissolve 35g NaOH in deionized water and make the final volume 100mL.
b. Dissolve 42g NaOH in deionized water and make the final volume 120mL.
c. Mix 42g NaOH and 78g deionized water and stir until dissolved.
d. Mix 35g NaOH and 65g deionized water and stir until dissolved.
c. Mix 42g NaOH and 78g deionized water and stir until dissolved.
You need to make 70.0% (v/v) isopropanol aqueous solution. How many mL of
isopropanol (70% v/v) aqueous solution can you make maximum if you only have
250mL pure isopropanol?
a. 175mL
b. 338mL
c. 357mL
d. 750mL
c. 357mL
How will you prepare 4.0L 0.85% (w/v) sodium chloride (NaCl) aqueous solution?
a. Mix 34g NaCl and 3966g deionized water and stir until dissolved.
b. Dissolve 340g NaCl into 3660g deionized water.
,c. Dissolve 85g NaCl in 4L deionized water.
d. Dissolve 34g NaCl in deionized water and make the final volume 4.0L.
d. Dissolve 34g NaCl in deionized water and make the final volume 4.0L.
You have to make 1.00L of 500mM MgCl₂ with deionized water and anhydrous
magnesium chloride (MgCl₂). How do you prepare this solution?
• Mg = 24.31g/mol
• Cl = 35.45g/mol
• H = 1.008g/mol
• O = 16.00g/mol
a. Dissolve 47.6g MgCl₂ into deionized water, and make the final volume 1.00L.
b. Dissolve 102g MgCl₂ into deionized water, and make the final volume 1L.
c. Dissolve 102g MgCl₂ into 1L deionized water.
d. Dissolve 47.6g MgCl₂ into 1L deionized water.
a. Dissolve 47.6g MgCl₂ into deionized water, and make the final volume 1.00L.
What is the osmolarity of 350mM MgCl₂ aqueous solution? (Assume magnesium
and chloride dissociate 100%)
a. 1.05 Osm/L
b. 1.05 Osm/kg
c. 1.50 Osm/L
d. 1.50 Osm/kg
a. 1.05 Osm/L
What are the normalities of these two base aqueous solutions and two acid
aqueous solutions?
, _____ 3.3M HCl
_____ 2.5M H₃PO₄
_____ 1.5M Ba(OH)₂
_____ 2.8M NaOH
1. 2.8N
2. 3.0N
3. 3.3N
4. 7.5N
3
4
2
1
You diluted your patient's 100μL serum with 400μL isotonic saline solution. What
is the final dilution of this? Choose all the correct answers.
a. 1:5 dilution
b. 1/5 dilution
c. 1/4 dilution
d. 1:4 dilution
A, B
You need to find out the titer of analyte X for patient Y. You performed a serial
dilution of patient Y's serum and ran a reaction with each dilution level as in the
table. You recorded the reaction result as (+) if there was a reaction and (-) if there
was not a reaction with the dilution level. What is the titer?
COMPLETE SOLUTIONS VERIFIED
How will you prepare 120g of 35.% (w/w) sodium hydroxide (NaOH) aqueous
solution?
a. Dissolve 35g NaOH in deionized water and make the final volume 100mL.
b. Dissolve 42g NaOH in deionized water and make the final volume 120mL.
c. Mix 42g NaOH and 78g deionized water and stir until dissolved.
d. Mix 35g NaOH and 65g deionized water and stir until dissolved.
c. Mix 42g NaOH and 78g deionized water and stir until dissolved.
You need to make 70.0% (v/v) isopropanol aqueous solution. How many mL of
isopropanol (70% v/v) aqueous solution can you make maximum if you only have
250mL pure isopropanol?
a. 175mL
b. 338mL
c. 357mL
d. 750mL
c. 357mL
How will you prepare 4.0L 0.85% (w/v) sodium chloride (NaCl) aqueous solution?
a. Mix 34g NaCl and 3966g deionized water and stir until dissolved.
b. Dissolve 340g NaCl into 3660g deionized water.
,c. Dissolve 85g NaCl in 4L deionized water.
d. Dissolve 34g NaCl in deionized water and make the final volume 4.0L.
d. Dissolve 34g NaCl in deionized water and make the final volume 4.0L.
You have to make 1.00L of 500mM MgCl₂ with deionized water and anhydrous
magnesium chloride (MgCl₂). How do you prepare this solution?
• Mg = 24.31g/mol
• Cl = 35.45g/mol
• H = 1.008g/mol
• O = 16.00g/mol
a. Dissolve 47.6g MgCl₂ into deionized water, and make the final volume 1.00L.
b. Dissolve 102g MgCl₂ into deionized water, and make the final volume 1L.
c. Dissolve 102g MgCl₂ into 1L deionized water.
d. Dissolve 47.6g MgCl₂ into 1L deionized water.
a. Dissolve 47.6g MgCl₂ into deionized water, and make the final volume 1.00L.
What is the osmolarity of 350mM MgCl₂ aqueous solution? (Assume magnesium
and chloride dissociate 100%)
a. 1.05 Osm/L
b. 1.05 Osm/kg
c. 1.50 Osm/L
d. 1.50 Osm/kg
a. 1.05 Osm/L
What are the normalities of these two base aqueous solutions and two acid
aqueous solutions?
, _____ 3.3M HCl
_____ 2.5M H₃PO₄
_____ 1.5M Ba(OH)₂
_____ 2.8M NaOH
1. 2.8N
2. 3.0N
3. 3.3N
4. 7.5N
3
4
2
1
You diluted your patient's 100μL serum with 400μL isotonic saline solution. What
is the final dilution of this? Choose all the correct answers.
a. 1:5 dilution
b. 1/5 dilution
c. 1/4 dilution
d. 1:4 dilution
A, B
You need to find out the titer of analyte X for patient Y. You performed a serial
dilution of patient Y's serum and ran a reaction with each dilution level as in the
table. You recorded the reaction result as (+) if there was a reaction and (-) if there
was not a reaction with the dilution level. What is the titer?
