Lab math Flashcards
Part/s of the % w/v formula
a. Weight in g
b. Atomic weight
c. Both weight in g and atomic weight
d. Neither weight in g nor atomic weight
Weight in g
Part/s of the Normality formula:
a. Equivalent weight
b. Volume in ml
c. Both equivalent weight and volume in ml
d. Neither equivalent weight nor volume in ml
c. Both equivalent weight and volume in ml
In the dilution 1/2 the number 1 represents the amount of:
a. Diluent
b. Sample
c. Diluent and sample
d. None of the choices
c. Diluent and sample
Define as the number of moles of solute per kg of solvent :
a. Molarity
b. Molarity
c. Normality
d. Percent Solution
b. Molarity
What is the final sample dilution if a serum sample is diluted serially, 1/2, 1/2 and finally 1/5?
a. 1/2
b. 1/4
c. 1/8
d. 1/20
d. 1/20
Which of the following can be used to derive the (H) of a strong acid?
a. (OH)
b. Ka
c. pH
d. A and C only
d. A and C only
A strong base:
a. Completely releases all its hydrogen in solution
b. Is 100% ionized
c. is not completely dissociated
d. B and C only
is not completely dissociated
Fill in the blank. Supply the missing part of the formula:
a. Weight of solvent
b. 100
c. 10
d. 1
b. 100
A buffer solution contains 0.45M HOAc and 0.49M NaOAc (pKa= 4.74) What is the role of NaOAc?
a. Conjugate acid
b. Conjugate base
c. Weak acid
d. Weak base
b. Conjugate base
What is the role of HOAc?
a. conjugate acid
b. conjugate base
c. weak acid
d. weak base
c. weak acid
What is the pH of the buffer?
a. 4.74
b. 4.76
c. 4.78
d. 4.80
c. 4.78
This is the process of lowering a solution concentration by adding solvent.
a. Dilution
b. Morality
c. Morality
d. Normality
a. Dilution
What is the normality of a 0.1 M H2S04 solution?
a. 0.1
b. 0.2
c. 0.3
d. 0.4
a. 0.1
True about buffers
a. resist sudden pH changes
b. Made up a weak acid or base
c. Both choices
d. Neither of the choices
c. Both choices
Part/s of the Henderson-Hasselbalch equation:
a. pH ort pOH
b. Weak acid or base concentration
c. pKa or pKb
d. All of the choices
c. pKa or pKb
