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Flashcards in Preparation of Solutions Deck (11):
1

differentiate concentrated solution from saturated solution

concentrated solution = large qty of solute
saturated solution = excess of undissolved solute particles

2

Which is false:
a. osmotic pressure - pressure that catalyses osmosis when solvent flows thru semipermeable membrane
b. vapor pressure - pressure at which liquid solvent is in equilibrium with the water vapour
c. all monosaccharides are reducing sugars
d. sucrose is a non-reducing sugar

A.
inhibits dapat

3

3 steps for dissolving the chemical into solution: rapid addition of solvent, heating, agitation by swirling.

sequence and justify!

1.heating - increase solubility
2.agitation by swirling- remove saturated solution from contact with the chemical
3.rapid addition of solvent - hastens dissolution of solid materials

4

Formula for concentration, using specific gravity and percent assay?

concentration = specific gravity x percent assay

5

After dissolving chemical into solution, what is done to the flask? What does this mean?

calibrated to 20 deg C, solution must be returned to room temperature before final adjustment is made

6

correct concentration of solution is ensured by 2 things: __ and __

quantitative transfer
accurate measurement of a chemical

7

T/F
specific gravity is used to prepare dilutions made from conc acids

T

8

Molality vs molarity - differentiate these two measurements of concentration

molality - amount of solute per kilogram of solvent
molarity - amount of solute per liter of solvent

9

T/F
molality is not influenced by temperature, but is influenced by pressure

F

molality is not influenced by temp or pressure

10

why is normality used? (2 reasons)

chemical titration
chemical reagent classification

11

T/F
supersaturated solution is thermodynamically unstable

T