Water, solubility, molarity, and dilution Flashcard

Name as many properties of water as u can
*high surface tension
*water is polar
*hydrogen bonding
*water is cohesive and adhesive
*universal solvent
*three states of matter
*water has high boiling point
*ice is less dense than water
*expands when frozen
*high specific heat,
* high heat of vaporization
water is most dense at what temperature?
4 degrees Celsius
like dissolves _______
water can dissolve __________ substances
water molecules bond __________
surface tension
measure of force necessary to stretch or break the surface of liquid
when liquid evaporates, the surface ________ (cools/ heats up). What do we call this?
cools; evaporative cooling
What are the 3 ways to increase solubility?
agitate, crush, heat up
crushing a substance does what to make it more soluble?
it increases the surface area of the substance
What does heating do to increase a subtance’s solubility
speeds up molecules which speeds up dissolving which increases amount of subtance that dissolves
most of something that can dissolve at a temperature
saturated solution
has dissolved the most it could of somethin
unsaturated solution
unfull, can still dissolve more stuff
super-saturated solution
temporarily holding MORE than it can, a seed crystal will make the excess solute come out
how do we super saturate a solution?
heat it up, put some more in, cool it down,
you have to cool it down so it could remain dissolved
what three things affect the solubility of a substance?
volume, pressure, temperature
t/f: pressure affects the solubility of a gas more than solid
t/f: increased temperature makes it harder to dissolve a solid in water
false, that’s a gas
concentration, how much moles in 1 liter
how do we find molarity?
divide moles of a substance by it’s volume
what is the unit for molarity
M or mol/L
how do we dilute
add more solvent to solution
Why do we dilute a solution?
to make the solution less concentrated or make it “weaker”
What is the formula used for dilution?
molarity #1 times volume #1 equals molarity #2 times volume #2

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