Ch 15 16 water and its properties test review
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Ch 15/16 Water and its Properties. Test Review. Aqueous solution – water w/ dissolved particles (aq) Solvent – water (dissolver) Solute – salt (dissolvee) (NEW WORD?).

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Ch 15 16 water and its properties test review
Aqueous solution – water w/ dissolved particles (aq)Solvent – water (dissolver)Solute – salt (dissolvee)(NEW WORD?)


Ch 15 16 water and its properties test review

Solvation: a solute dissolves or dissociates into ions(happens with most soluble ionic compounds and acids)Electrolyte: will conduct electricity when dissolved in a liquid.3 ways to speed up solvationHeatingStirring (agitation)Increasing surface area of the solute (powder)


Ch 15 16 water and its properties test review

Solubility – g of solute per 100g of solvent at a certain temperatureBelow: 2 different liquids, same amount of solute (dye). Note black bars.


Does solubility change with temperature temperature increase means solubility increases
Does solubility change with temperature?Temperature Increase meansSolubility increases


Ch 15 16 water and its properties test review

saturated solution- will dissolve no more solute (at that temperature). Excess usually makes a pile of crystals on the bottom.unsaturated solution – will dissolve more solute (at that temperature)(left 3 beakers on next slide)


Dilute vs concentrated
Dilute vs concentrated

As you add more solute, from left to right 

Dilute More Concentrated Saturated Saturated

Since 3 on right are saturated, keep adding solute, but they don’t get darker. No more dissolves into them.


Ch 15 16 water and its properties test review
Supersaturated solution – contains more solute then should be dissolved at a temperatureex…heating then cooling a solution


Supersatured videos
Supersatured videos

http://www.youtube.com/watch?v=XSGvy2FPfCw

http://www.youtube.com/watch?v=HnSg2cl09PI

3 min Long one if you have extra time: http://www.youtube.com/watch?v=1y3bKIOkcmk


New subject gas solubility s 1 s 2 p 1 p 2
New Subject: Gas Solubility: S1 = S2 P1 P2

Called Henry’s Law.

Amount of gas dissolved in a liquid.

Solubility of a gas in a liquid is directly related to pressure.


Gas solubility
Gas Solubility:

Also, as temperature increases, more gas will dissolve into the liquid.

Temp Increase means

Solubility increases


Ch 15 16 water and its properties test review

Miscible – liquids dissolve in each other. (liquids that can mix together)Immiscible – Guess?Is this lava lamp miscible or immiscible?


Ch 15 16 water and its properties test review

Molarity: M = mol ÷ L (of solution) molality: m = moles of Solute Pg 538 kg of solventn = molesConcentrations (Note case of M / m) Molarity: M = Volume based of SOLUTION! (after mix) molality: m = Mass based of SOLVENT! (before mix)Solute + Solvent = Solution


Ch 15 16 water and its properties test review
By adding water you can dilute the molarityM1V1=M2V2When you ADD WATER, moles of solute stays the same.


Ch 15 16 water and its properties test review

A change in a property of a solvent that depends on the concentration of dissolved solute(s) particles is called a colligative property. Colligative properties are vapor pressure lowering, boiling point elevation, freezing point loweringNumber of solute particles in a solution determines colligative properties.