Solutions
Molarity
Acids & Bases
Titrations
Potpourri
100
DAILY DOUBLE! 100 points each
In a mixture (solution), what is the term for the substance that is...
1. doing the dissolving? (the higher %)
2. being dissolved? (the lower %)
1. solvent
2. solute
100
What is "molarity?"
(you can define this in 1 word!)
concentration
100
LIST QUESTION! 100 points each correct answer
Make a table comparing acids and bases. You can include: common ions in each, pH values, taste, examples, and what each does to litmus paper.
Acids: H+ ions, pH < 7, sour, citrus fruits, turn litmus red
Bases: OH- ions, pH > 7, bitter, cleaning products, turn litmus blue
100
Substances, like litmus paper or phenolphthalein, that turn color based on a solution's pH are called __.
indicators
100
Daily Double! 100 points each
1. What substance is the "universal solvent?"
2. When another substance is dissolved in #1, what is the solution considered to be?
1. water
2. aqueous (aq)
200
Another term for a homogenous mixture
a solution
200
What is the formula for finding molarity?
Molarity (M) = mol (solute) / L (solution)
200
DAILY DOUBLE! 100 points each
Name the following 2 acids containing nitrogen.
1. HNO2
2. HNO3
1. HNO2 = nitrous acid
2. HNO3 = nitric acid
200
In a titration, the solution of known concentration is known as the __ solution.
standard
200
What is the term for the process of trying to find an unknown concentration for an acid or base?
Titration
300
What are 3 ways to increase the rate at which a substance dissolves?
Powderize it (crush it)
Heat it
Stir it
300
What is the molarity (M) of a solution that contains 33.5 g NaOH dissolved in 75 mL of water?
11.17 M NaOH
300
Write the formulas for the following acids:
(100 points each)
1. hydroiodic acid
2. phosphorous acid
3. phosphoric acid
1. HI
2. H3PO3
3. H3PO4
300
VISUAL DAILY DOUBLE! 600 points!
What is the name of this piece of lab equipment that is filled with the basic solution in a titration and delivers it to the acid in small increments?
A burette
300
For a gas solute, as pressure is increased, solubility will __.
also increase
400
What mass of salt (NaCl) would have to be mixed with 100 g of water at 90oC for it to be considered "saturated?"
40 g NaCl
400
How many grams of salt (NaCl) are needed to make a 1.5 M 100 mL solution of salt water, NaCl (aq)?
8.7 g NaCl
400
What is the pH of a substance that has a concentration of 5.5 x 10 - 6 of H+ ions, and is this an acid or base?
pH = 5.26
Acid
400
DAILY DOUBLE! 800 points!
A 0.405 L solution of Al(OH)3 is neutralized by 0.200 L of a 0.220 M solution of H(NO3). Write the balanced equation for this reaction and calculate the molarity of the Al(OH)3 solution.
0.0362 M Al(OH)3
400
What is a solution called when more solute is dissolved than theoretically possible?
supersaturated
500
Which of the following combinations of substances would be "immiscible?"
A. polar + polar
B. polar + nonpolar
C. nonpolar + nonpolar
"Like dissolves like"
B. polar + nonpolar would not dissolve
500
How many mL of water are needed to make a 3.5 M HCl solution when using 25.0 grams of HCl?
196 mL
(0.196 L)
500
What is the concentration of OH - ions in a solution with a pH of 10.3?
[OH-] = 1.99 x 10 -4
500
DAILY DOUBLE! 1,000 points!
A 500 mL solution of hydrochloric acid has an unknown concentration. A 500 mL solution of magnesium hydroxide has a 0.075 M concentration. What is the concentration of the hydrochloric acid solution?
0.15 M HCl
500
What is the common name of "ascorbic acid?"
Vitamin C