Solutions Flashcards
Solution
Homogenous mixture of 2 or more substances (1 face)
Solute:
Part that gets dissolved (usually part present in smaller amount)
Solvent:
Does the dissolving (Substance present in the larger amount)
Solute + solvent =
Solution
Alloy:
Metallic solid solution confused of 2 or more elements (elements not chemically combined and can be separated by physical means (boiling point))
Soluble:
When something has the ability to dissolve
Insoluble:
Does not dissolve
Miscible:
Liquid solute dissolves in liquid solvent
Immiscible:
Liquid solute does not dissolve in liquid solvent
Unsaturated:
LESS THAN MAX HOLDING AMOUNT of solute (for that temp) dissolved in the solvent. (Solvent can hold more solute at a given temp)
Saturated:
solvent had reached MAX HOLDING CAPACITY of solute at that temp (undissolved solid remains in container)
Supersaturated:
Solvent HOLDS MORE solute than normal at this temp. (Done by heating the solution and forcing it to hold more than it’s max). THESE SOLUTIONS R UNSTABLE
X and y axis for solubility graphs:
X - temp
Y - solubility in grams
Another word for dissolving:
Dissolution
Rate of solution (dissolving):
How quickly a substance will dissolve
Factors affecting rate of dissolving:
Agitation, temp, surface area, pressure, types of molar polarity
Agitation (shake or stir)
Solubility ⬆️ as u shake or stir
- dissolving ⬆️, collisions between solvent and solute
Temp (solid and liquid)
Temp ⬆️ solubility ⬆️
Kinetic energy ⬆️, more collisions between solute and solvent
Temp in gas
More heat, less dissolves
Surface area (solids only)
⬆️ surface area, ⬆️ solubility (particle size), ⬇️ size, more likely solute will come in contact with solvent
Pressure (gases only)
As pressure ⬆️, solubility ⬆️
Types of solvent (aka molar polarity)
Ionic dissolve in ionic, pulse dissolves in polar and polar ionic, non polar in non polar
Intermolecular bonds:
Force of attraction or bonds within a molecule (i.e.; ionic or covalent)
Intermolecular:
Force of attraction or bonds between molecules
Polar or ionic solute dissolve in
Polar solvents
How do solute dissolve in solvents
Moving solvent molecules climates around split MLcs. (-) ends of solvent attract to (+) ends of the solute
What do solvent molecules do
Pull solute into solution
Moving solvent molecules:
Spread the solute out equally throughout the solution
Concentration:
A solution where there is a relatively large amount of diluted per unit v of solution
C=
Quantity of solution (solute + solvent)
Unsaturated has:
No solute visible, solvent is capable of holding more solute at given temp
Saturated has:
Max holding capacity
% C
M of solute
———- X100
V of solution
Ppm
X10 to the 6
Ppb
X 10 to the 9
Ppt
X 10 to the 12pp
Ppm ex:
Grams x 10 to the 6
—————–//
V
Dilution
A solution with a relatively small amount of solute per unit v of solution
Solution calculation:
M1v1 = m2v2
Acids produce _____ with reaction to active metals:
H gas
Acids produce _____ with reaction to carbonate compounds
Co2
Arrhenius definition of acid
Substance which undergo ionization to release hydrogen ions in water
Arrhenius definition of base
Substances that produce hydroxide ions in water
Strong acid + base
Dissociates completely into ion in water
Weak acids and bases:
Dissociates very slightly in solution (most bases r weak)
PH
A figure expressing the acidity or alkalinity of a solution on the logarithmic scale
Calculate ph:
-log [H+]
Titration:
Laboratory process used to determines c of an acidic or basi solution
Standard solution:
Titrating solution of unknown c with a solution of known c (standard solution goes in butter)
Solution u are trying to find goes in
Flask
Indicator changes colour at
Neutralization point
End point:
When the stark colour change occurs
Titration equation :
nbMaVa = naMbVb