LEC 16: Solutions Flashcards
homogenous mixture of two or more substances in relative amounts that can be varied continuously up to the limit of solubility
solution
the term solution is commonly applied to the ____ state of matter
liquid
components of mixture form a single phase
homogenous mixture
a solution consists of a:
- solute
- solvent
substance that is being dissolved
solute
dissolving medium
solvent
properties of solution
- a solution is a homogenous mixture
- constituent particles of a solution cannot be seen by naked eyes
- solutions do not scatter a beam of light passing through it
- solute particles cannot be separated by filtration
- solute or solvent particles do not settle down when left undisturbed
- solutions are stable at a given temperature
the path of the light beam is ______ in solutions
not visible
depend in large part on solutions
life processes
oxygen from the lungs goes into solution in the _____, unites chemically with the _______ in the red blood cells, and is released to the body tissues
- blood plasma
- hemoglobin
chemists take advantage of differences in ______ to separate and purify materials and to carry out ______
- solubility
- chemical analysis
most chemical reactions occur in _____ and are influenced by the solubilities of the ______
- solution
- reagents
usually produced by melting the mixture of ingredients
alloys
types of solutions based on the quantity of solute in a solution
- unsaturated solution
- saturated solution
- supersaturated solution
solution in which we can still add more solute at a given temperature
unsaturated solution
solution in which we cannot dissolve more solute in the solvent at a given temperature
saturated solution
saturated solution in which we add more solute by raising the temperature or pressure
supersaturated solution
in supersaturated solutions generally, _____ starts forming
crystals
types of solutions based on the amount of solvent added
- concentrated solution
- dilute solution
has a very small amount of solute in a large quantity of solvent
dilute solution
concentration in which solute is present in large quantity
concentrated solution
means twice the alcohol (ethanol) content by volume
proof
refers to the amount of solute present in a given amount of solution
concentration of a solution
the amount of solute can be represented by its _____ or _____
- mass
- volume
the relative amount of solute and solvent present in a solution can be represented by different methods of _______
expression
formula of percent composition by mass
percent by mass = (mass of solute/mass of solution) x 100
used when preparing solutions of liquids
volume percent or volume/volume percent (v/v%)
formula of volume percent
v/v% = [(volume of solute)/(volume of solution)] x 100%
volume percent is relative to ____
volume of solution
______ are not necessarily additive because the two substances mix to create less than the additive volume
volumes
the ____ is often a lower volume than the sum of the separate parts
solution
number of moles of the solute per liter of solution
Molarity
Molarity is used to express the number of ____ of solute in exactly one liter of a solution
moles
Molarity formula
Molarity = moles of solute / volume of solution in liters
similar to Molarity but uses mass (kg) of the solvent rather than the volume of solution
molality
molality formula
molality = moles of solute / kg of solvent