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Solution Solute-what is BEING
dissolved the lesser substance
Solvent-what is DOING the dissolving the greater substance
Solutes and solvents can be any state of matter: solid, liquids or gases
Examples of solutions Solid-solid solution:
Bronze, 18 K gold; pewter
Solid-liquid solution: Saline solution, kool-aid
Liquid-gas solution: Coke
Gas-gas solution: Air
Liquid- liquid solution: Alcohol
Solubility The ability of a
substance to dissolve another substance
You may see this solubility chart on your GHSGT or SAT:
The solubility of which substance is most affected by an increase in temperature?
More surface area (crush)
Shake or stir Increase
temperature Not all substance
dissolve. Some are
Soluble, Insoluble, or partly soluble
To increase RATE of dissolving:
Concentration: the ratio of solute to solvent
Dilute: more solvent than solute (“watered down”)
Concentrated: more solute than solvent (orange juice from
concentrate; Pine Sol)
Concentration of solutions We used solutions of different
concentrations in labs: 1 M HCl; 6 M NaOH; .5 M Pb(NO3)2
The higher the number, the more concentrated the solution
Unit of concentration is Molar (M) 1 Molar solution has 1 mole of solute
dissolved in 1 Liter. 6 Molar solution has 6 moles of solute
dissolved in 1 Liter
Types of solutions Saturated-As much solute as possible is
dissolved at that temperature. Kool-aid, chocolate milk
Unsaturated-More solute can still dissolve in the solution.
Supersaturated- a solution that has dissolved more solute than usual by increasing the temperature. Making jello; or making candy. (You have to
heat the water first to dissolve the sugar.)
Solubility Curve Be able to read
a graph! Saturated is on
the line. Unsaturated is
under the line Supersaturated
is above the line.
Supersaturated
Saturated
Unsaturated
pH Scale pH means –log of H+ concentration scale ranges from 0-14; every step away from
seven is a power of ten more acidic or basic 7 is neutral: H+ = OH- concentration
Acids Produce H+ ions in solution: H+ + H2O -> H3O+ (hydronium ion)
Properties of acids: Taste sour Corrosive Conduct electricity Turns litmus paper RED pH of 0 - 6.9 (pH means the
concentration of H+ ions)
Common Acids Strong acids (strong electrolytes)
HCl; HNO3; H2SO4
HF Lemon juice Gastric acid
Weak Acids (weak electrolytes) Vinegar Carbonic acid Citric acids
Bases Produce OH- ions in solution: Properties of bases:
Taste bitter Feels slippery Corrosive Conduct electricity Turns litmus paper BLUE pH of 7.1 - 14
Common Bases Strong bases (strong
electrolytes) Drano NaOH; KOH
Weak Bases (weak electrolytes) Deodorant Ammonia Soaps Shampoos antacids