Dimensional Analysis
Stoichiometry
Acids and Bases
Calculating pH/pOH
Gas Laws
100
How many pennies are in $2.75?
275 pennies
100
What is Avogadro's number?
6.02 x 10 ^23
100
Name this and explain what it's used for.
pH scale - an indicator. Tells us what is acidic and basic.
100
What formula do we use to calculate pH of an acid?
pH = -log[H+]
100
What variables do we use for Boyle's law?
pressure and volume
P1V1 = P2V2
200
How many seconds are in 1 day?
86,400 seconds in a day
200
What is the molar mass of C6H12O6?
180.16 g/mol
200
Give 2 differences between an acid AND base.
Color, taste, corrosive, pH scale, etc.
200
What is the formula for finding the hydroxide ion concentration [OH-]?
OH = 10 ^-pOH
200
How are temperature and volume related to each other? What law is this?
Charles' Law - directly proportional
300
Knowing 1 kilometer = 0.621 miles, how many kilometers will a person run during a 10 kilometer race?
6.21 miles
300
In the mole to mole ratio step, where do you get the number of moles from?
the balanced chemical equation
300
Solve for this neutralization reaction:
HBr + KOH --->
KBr + H2O
300
What is the pH of a 0.0235 M HCl solution?
1.63
300
According to Dalton's Law of Partial Pressure, the TOTAL pressure is equal to...
the sum of all the pressures.
400
The average student is in class 330 minutes a day. How many hours a day is this?
~5.5 hours
400
Find the % composition of HCl.
H - 2.76%
Cl - 97.24%
400
Name the following:
Mg(OH)₂
H₂SO₃
HBr
Magnesium hydroxide
Sulfurous acid
Hydrobromic acid
400
What is the pH of a 6.2 x 10-5 M NaOH solution?
pOH = -log[OH-] = -log(6.2 x 10-5) = 4.21 pH
14.00 – 4.21 = 9.79
400
A weather balloon contains 8.80 moles of helium at a pressure of 0.992 atm and a temperature of 25 °C at ground level. What is the volume of the balloon under these conditions?
R= 0.0813
215 L
500
Every 7 times I clean my room, my mother makes me a cake. I cleaned my room 14 times, how many cakes does my mom owe me?
MUST SHOW WORK!!
98 CAKES!!!
500
C₆H₁₂O₆ ---> 2 C₂H₅OH + 2 CO₂
How many grams of CO₂ will you have if you start off with 180 grams of C₆H₁₂O₆?
43.97 grams of CO₂
500
Define an Arrhenius acid and base.
Arrhenius acid increases the H+ concentration while an Arrhenius base increases the OH- concentration.
500
A solution has a pH of 6.1. What is the concentration of Hydroxide ions?
pH + pOH = 14
14 – 6.1 = pOH
7.9 = pOH
10-pOH = [–OH]
10-7.9= [–OH] 1.2 x 10-8 = [–OH]
500
If the pressure exerted by a gas at 25 °C in a volume of 0.044 L is 3.81 atm, how many moles of gas are present?
R= 0.0813
.0069 moles