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)+ 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)+ 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)+ 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)+ 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