Chemical Reactions
Stoichiometry
Solutions
Acids and Bases
Other
100
What is the reactant(s) in the chemical equation below.
H2 + O2 ---> H2O
H2 + O2
100
How many moles of HNO3 are in the equation below?
Cu + 4HNO3 --> Cu(NO3)2 + 2NO2 + 2H2O
4 moles
100
Which beaker is the most concentrated? (highest molarity)
C
100
Give 2 characteristics of acids and 2 characteristics of bases.
Checked by Mrs. Molina :)
100
Why does a higher temperature speed up a reaction?
Molecules are moving faster with more energy so they are colliding more often and have enough energy to break/make new bonds.
200
What type of reaction is the following?
H2O ---> H2 + O2
Decomposition
200
What is the molar mass of HNO3?
63.02g
200
If I have a 10.2 moles in 8.5L of water, what is my molarity?
1.2M
200
Label the acid and base reaction below
HCl(aq)+NH3(aq)→NH4+(aq)+Cl−(aq)
Acid:HCl
Base:NH3
200
If I increase the pressure which direction does it shift?
H2(g)+I2(g)⇌2HI(g)+Heat
No shift
300
What some evidences of a chemical reaction?
Color change, produce solid or gas, temperature change, breaking/forming bonds, etc.
300
If I have 5.8 moles of Cu, how many moles H2O can I make?
Cu + 4HNO3 --> Cu(NO3)2 + 2NO2 + 2H2O
11.6 moles H2O
300
If I have a 20L solution with a 1.35M and add 50L to it, what is the final molarity?
.39M
300
Calculate out the pH and tell me if it is an acid, base, or neutral.
H+=4.12x10-9
pH=8.39
Base
300
What are 3 ways that I can shift the reaction to go backwards?
H2(g)+I2(g)⇌2HI(g)+Heat
remove H2, I2
add HI
increase temperature
400
Balance the following:
H2O ---> H2 + O2
2H2O ---> 2H2 + O2
400
If I have 120g of HNO3 how many grams of H2O can I make?
Cu + 4HNO3 --> Cu(NO3)2 + 2NO2 + 2H2O
17.16g H2O
400
What is the freezing point of a 1.65m aqueous solution of KCl?
-6.14*C
400
Predict the products- include charge!
H2NO3+ + H2O--->
Acid. Base
HNO3 +OH-
400
Draw the following reaction
H2(g)+I2(g)⇌2HI(g)+100kJ
Mrs. Molina with check your graph!
500
Balance the following:
C5H12 + O2 ---> CO2 + H2O
C5H12 + 8O2 ----> 5CO2 + 6H2O
500
If I want to make 7.1x1024 molecules of H2O, how many moles of HNO3 do I need to start with?
Cu + 4HNO3 --> Cu(NO3)2 + 2NO2 + 2H2O
23.58 moles of HNO3
500
Why does having more salt in water increase its boiling point.
-blocking at the surface
-ion-dipole is stronger than hydrogen bond
500
Lewis Acid and Base problem
Answer on board :)
500
6.2 liters of an ideal gas is contained at 3.0 atm and 37 °C. How many moles of this gas are present?
0.75 mol