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Unit 7 Solutions
Terms in this set (37)
What is a solution?
homogenous mixture of two or more substances
What is the solvent?
the substance in which the solute dissolves (water is a good example)
What is the solute?
A substance that is dissolved in a solution (the KoolAid powder, for example).
the amount of solute that dissolves in a solvent
An unsaturated solution is...
a solution in which more solute can be dissolved.
A saturated solution is...
a solution that contains the maximum amount of solute that is capable of being dissolved.
A supersaturated solution is...
a solution that contains more than the maximum amount of solute that is capable of being dissolved at a given temperature. (examples: honey, syrup)
When no more sugar will dissolve in a glass of water, the solution is:
You and your friend have a contest to see who can sweeten iced tea the fastest. What strategies would help you to win?
Stirring, heat, crushing the sugar.
If a solution forms an insoluble compound, then it is called a:
Which table is used to determine if a compound is soluble or insoluble?
What is the symbol for molarity?
Where can you find the formula for molarity?
What is the molarity of the following solution: 1.33 moles of KNO3 dissolved in 750 mL of water
1.33 mol KNO3/0.750 L = 1.77 M KNO3 solution
What is the number of moles in the following solution: 0.50L of a 2.0 M NaOH solution
2.0 M NaOH = X moles / 0.5 L X = 1 mole
What is the volume of 0.25 moles of a 1.5M KOH solution?
0.25 moles/1.5M KOH = 0.17 L
What is the equation for dilutions?
M1V1 = M2V2
A student dilutes 1.0 L of a 1.5M HCl solution to a final volume of 3.0L
(1.0L)(1.5M) = (3.0L)(X) X = 0.5M
Solubility curves: On the line is...
Solubility curves: Under the line is...
Solubility curves: Above the line is...
What is the general rule for mixing two liquids together?
Like dissolves like (polar dissolves polar and nonpolar dissolves nonpolar)
Colligative properties of solutions include:
freezing point and boiling point
Colligative properties of solutions depend on:
the ratio of the amount of particles of solute and solvent in the solution, not the identity
The freezing point of a solution compared to the freezing point of the pure solvent is (lower or higher):
The boiling point of a solution compared to the boiling point of the pure solvent is (lower or higher):
Which will have the lower freezing point, 1.0M NaCl or 1.0M AlCl3?
1.0M AlCl3 (more particles)
Which will have the higher boiling point, 1.0M CaBr2 or 1.0M AlBr3?
1.0M AlBr3 (more particles)
A solution with a lower freezing point and higher boiling point is (more or less) concentrated.
An electrolyte is...
a substance that contains ions in an aqueous solution. Will conduct electricity!
Identify the solute and the solvent in the following: 10 grams of NaCl in 100 g of water.
Solute = NaCl, solvent = water
State whether the following refers to a saturated or unsaturated solution: A spoonful of salt added to boiling water dissolves.
State whether the following refers to a saturated or unsaturated solution: A layer of sugar forms on the bottom of a glass of tea as ice is added.
Parts per million is used to describe:
very small amounts of something in very large amounts of something else. Often used to express the concentration of contaminants in water, etc.
Where can you find the formula for parts per million?
What is the concentration of a solution, in parts per million, if 0.02 gram of NaCl is dissolved in 1000. grams of solution?
0.02g NaCl/1000 g solution x 1,000,000 = 20 ppm
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