BLD 313 FINAL EXAM QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS GRADED A++
You need to prepare 1000 g of 20 %w/w sodium hydroxide (NaOH) solution. How
much NaOH and deionized water do you need?
200 g of NaOH and 800 g of deionized water
You need to make 75 %v/v ethanol solution. How many mL of ethanol (75 %v/v)
solution can you make maximum if you only have 450 mL of pure ethanol,
600 mL
You have to make 5 L of 0.85 %w/v sodium chloride (NaCl) solution. How much
NaCl and deionized water do you need to prepare this?
42.5 g of NaCl and 5 L of deionized water
You have to make 1 L of 500 mM MgCl2 with deionized water and magnesium
chloride hexahydrate MgCl2•6H2O. How do you prepare this solution?
(molar mass: Mg = 24.31 g/mol, Cl = 35.45 g/mol, H = 1.008 g/mol, O = 16.00 g/mol)
Dissolved 102 g of MgCl2•6H2O into deionized water, and make the final volume 1 L.
What is the osmolarity of 500 mM MgCl2 aqueous solution?
1.50 Osm/L
What is the Normality of 2.3 M NaOH
2.3 N
What is the Normality 3.0 M Ba(OH)2
, 6.0 N
What is the Normality 3.2 M HCl
3.2 N
What is the Normality 2.1 M H3PO4
6.3 N
You diluted your patient's serum 100 μL with 300 μL isotonic saline solution.
What is the final dilution of this?
1:4 dilution or 1/4 dilution
Sodium acetate CH3COONa (0.10 moles) and acetic acid CH3COOH (0.030 moles)
were used to make 1 L aqueous solution. What is the final pH of this solution?
Acetic acid pKa = 4.76
pH 5.3
2-acetoxybenzoic acid (aspirin) is a weak acid (pKa = 3.48). What would be the pH
of 13 mM aspirin solution?
pH 2.7
quality assurance program of clinical laboratories
Check every aspect of the entire testing process including pre-analytical, analytical and
post-analytical phases
example of preanalytical error
A specimen that is mislabeled
What is NOT a part of the quality assurance program of a clinical laboratory?
Refer patients to specialists based on appropriate test results
COMPLETE SOLUTIONS GRADED A++
You need to prepare 1000 g of 20 %w/w sodium hydroxide (NaOH) solution. How
much NaOH and deionized water do you need?
200 g of NaOH and 800 g of deionized water
You need to make 75 %v/v ethanol solution. How many mL of ethanol (75 %v/v)
solution can you make maximum if you only have 450 mL of pure ethanol,
600 mL
You have to make 5 L of 0.85 %w/v sodium chloride (NaCl) solution. How much
NaCl and deionized water do you need to prepare this?
42.5 g of NaCl and 5 L of deionized water
You have to make 1 L of 500 mM MgCl2 with deionized water and magnesium
chloride hexahydrate MgCl2•6H2O. How do you prepare this solution?
(molar mass: Mg = 24.31 g/mol, Cl = 35.45 g/mol, H = 1.008 g/mol, O = 16.00 g/mol)
Dissolved 102 g of MgCl2•6H2O into deionized water, and make the final volume 1 L.
What is the osmolarity of 500 mM MgCl2 aqueous solution?
1.50 Osm/L
What is the Normality of 2.3 M NaOH
2.3 N
What is the Normality 3.0 M Ba(OH)2
, 6.0 N
What is the Normality 3.2 M HCl
3.2 N
What is the Normality 2.1 M H3PO4
6.3 N
You diluted your patient's serum 100 μL with 300 μL isotonic saline solution.
What is the final dilution of this?
1:4 dilution or 1/4 dilution
Sodium acetate CH3COONa (0.10 moles) and acetic acid CH3COOH (0.030 moles)
were used to make 1 L aqueous solution. What is the final pH of this solution?
Acetic acid pKa = 4.76
pH 5.3
2-acetoxybenzoic acid (aspirin) is a weak acid (pKa = 3.48). What would be the pH
of 13 mM aspirin solution?
pH 2.7
quality assurance program of clinical laboratories
Check every aspect of the entire testing process including pre-analytical, analytical and
post-analytical phases
example of preanalytical error
A specimen that is mislabeled
What is NOT a part of the quality assurance program of a clinical laboratory?
Refer patients to specialists based on appropriate test results
