MCQ practice
If 200. mL of 0.60 M MgCh(ag) is added to 400. mL of distilled water, what is the concentr the resulting solution? (Assume volumes are additive).
.2 M
A 40.0 mL sample of 0.25 M KOH is added to 60.0 mL of 0.15 M Ba(OH)2. What is the molar concentration of OH (aq) in the resulting solution? (Assume that the volumes are additive.)
.28 M
A 360. mg sample of aspirin, C,HgO4, (molar mass 180. g), is dissolved in enough water to produce 200. mL of solution. What is the molarity of aspirin in a 50. mL sample of this solution?
0.0100 M
how many mL of 10 M HCl are needed to prepare 500 mL of 2 m HCl
100. mL
the ph of a solution prepared by the addition of 10. mL or 0.002 M KOH(aq) to 10. mL of distilled water is closest to
11
the volume of distilled water that should be added to 10.0 mL or 6 M HCl(aq) in order to prepare a .5 M HCl(aq) solution is approximately
110 mL
Which of the following pieces of laboratory glassware should be used to most accurately measure out a 25.00 mL sample of a solution?
25 mL pipet
Then 70. milliliter of 3.0-molar NazCO3 is added to 30. milliliters of 1.0-molar NaHCO3 the resulting incentration of Na" * is
4.5 M
A student wishes to prepare 2.00 liters of 0.100-molar KI03 (molecular weight 214). The proper procedure is to weigh out
42.8 g of KIO3 and add H2O
Approximately what mass of CuSO4 • 5H20 (250 g mol) is required to prepare 250 mL of 0.10 M copper(1I) sulfate solution?
6.2 g
Of the following organic compounds, which is LEAST soluble in water at 208 K?
C6H12O6 glucose
11. Sodium chloride is LEAST soluble in which of the following liquids?
CCL4
On the basis of the solubility curves shown above, the greatest percentage of which compound can be recovered cooling a saturated solution of that compound from 90°C to 30°C?
KNO3
Which of the following techniques is most appropriate for the recovery of solid KNO3 from an aqueous solution of KNO3
evaporation to dryness
Based on the results of the paper chromatography experiment shown above, which of the following can be concluded about the dye?
it has a trinket attraction for the stationary phase than it had for the mobile phase
Based on concepts of polarity and hydrogen bonding, which of the following sequences correctly lists the compounds above in the order of their increasing solubility in water?
x<y<z
