IB DP Chemistry: Stoichiometric relationships

Question 1

Determine which of the following equations is not balanced correctly.

Accepted Answer

Fe2O3(s) + 2C(s) → 3Fe(s) + 2CO2(g)

Question 2

Rank the following lab equipment by increasing precision.

Accepted Answer

beaker, graduated cylinder, volumetric pipette

Question 3

Which of the following is not a name associated with a change of state?

Accepted Answer

precipitation

Question 4

True or False? When balanced, the equation below has a sum of coefficients of 24.

Accepted Answer

False

Question 5

Which of the following graphs shows how the average kinetic energy of the particles in a sample of an ideal gas?

Accepted Answer

D

Question 6

Which changes of state do not involve the release of energy (exothermic)?

Accepted Answer

sublimation and evaporation

Question 7

For an ideal gas, recall which variables are inversely proportional to each other, if all other factors remain constant.

Accepted Answer

P, V

Question 8

Which of the following correctly describes the particles in the diagram below?

Accepted Answer

a) separate atoms b) molecules c) compound d) atoms, molecules and compound

Question 9

Argon gas in a sealed container of fixed volume is heated from 300K to 500K. Which quantity will not remain constant?

Accepted Answer

the average kinetic energy of the atoms

Question 10

Which of the following best describes what the notation [CuSO4] means?

Accepted Answer

the molar concentration of the copper(II) sulfate solute

Question 11

0.200 mol of CaF2 is dissolved into 50.0 cm3 of water and diluted up to a total of 250 cm3. What is the concentration?

Accepted Answer

0.800 mol dm–3

Questions 11