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Stoichiometric Relationships

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Introduction to the particulate nature of matter and chemical change

Subtopic

Introduction to the particulate nature of matter and chemical change under Stoichiometric Relationships for Grade 12 IB.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which statement correctly describes a chemical change?

    A.

    The composition of the substance remains the same, but its state changes.

    B.

    New substances are formed with different chemical properties.

    C.

    The change can always be reversed by physical means such as filtration.

    D.

    Only the intermolecular forces are broken, not the covalent or ionic bonds.

  2. 2.

    When the following equation is balanced using the smallest whole-number coefficients, what is the coefficient for O2O_2?\n\nC2H6(g)+O2(g)rightarrowCO2(g)+H2O(l)C_2H_6(g) + O_2(g) \\rightarrow CO_2(g) + H_2O(l)

    A.

    5

    B.

    7

    C.

    4

    D.

    13

  3. 3.

    Based on the classification of matter, which of the following is an example of a homogeneous mixture?

    A.

    A mixture of sand and water

    B.

    A sample of sulfur powder

    C.

    A solution of sodium chloride in water

    D.

    A bowl of cereal with milk

Download the worksheet for Stoichiometric Relationships - Introduction to the particulate nature of matter and chemical change to practice offline. It includes additional chapter-level practice questions.

The mole concept

Subtopic

The mole concept under Stoichiometric Relationships for Grade 12 IB.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    A compound has an empirical formula of CH2CH_2 and a relative molecular mass (MrM_r) of 56.1256.12. What is its molecular formula?

    A.

    C2H4C_2H_4

    B.

    C3H6C_3H_6

    C.

    C4H8C_4H_8

    D.

    C5H10C_5H_{10}

  2. 2.

    According to the IB Data Booklet, what is the volume occupied by 0.500 mol0.500\text{ mol} of an ideal gas at STP (273 K273\text{ K} and 100 kPa100\text{ kPa})?

    A.

    22.7 dm322.7\text{ dm}^3

    B.

    11.35 dm311.35\text{ dm}^3

    C.

    11.2 dm311.2\text{ dm}^3

    D.

    5.68 dm35.68\text{ dm}^3

  3. 3.

    Which of the following substances contains the same number of atoms as 12.01 g12.01\text{ g} of Carbon-12?

    A.

    2.02 g2.02\text{ g} of Hydrogen gas (H2H_2)

    B.

    16.00 g16.00\text{ g} of Oxygen atoms (OO)

    C.

    32.00 g32.00\text{ g} of Oxygen gas (O2O_2)

    D.

    14.01 g14.01\text{ g} of Nitrogen gas (N2N_2)

Download the worksheet for Stoichiometric Relationships - The mole concept to practice offline. It includes additional chapter-level practice questions.

Reacting masses and volumes

Subtopic

Reacting masses and volumes under Stoichiometric Relationships for Grade 12 IB.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    A student dissolves 0.200.20 mol of NaClNaCl in distilled water to make 500500 cm3cm^{3} of solution. What is the concentration of the solution in mol dm−3mol\,dm^{-3}?

    A.

    0.10 mol dm−3mol\,dm^{-3}

    B.

    0.40 mol dm−3mol\,dm^{-3}

    C.

    0.04 mol dm−3mol\,dm^{-3}

    D.

    1.00 mol dm−3mol\,dm^{-3}

  2. 2.

    When the following equation is balanced using the smallest possible whole numbers, what is the sum of the coefficients? aC3H8(g)+bO2(g)→cCO2(g)+dH2O(l)aC_{3}H_{8}(g) + bO_{2}(g) \rightarrow cCO_{2}(g) + dH_{2}O(l).

    A.

    10

    B.

    12

    C.

    13

    D.

    15

  3. 3.

    What is the volume, in dm3dm^{3}, occupied by 2.002.00 mol of an ideal gas at STP (273273 K and 100100 kPa)?

    A.

    22.7 dm3dm^{3}

    B.

    44.8 dm3dm^{3}

    C.

    45.4 dm3dm^{3}

    D.

    24.0 dm3dm^{3}

Download the worksheet for Stoichiometric Relationships - Reacting masses and volumes to practice offline. It includes additional chapter-level practice questions.

Stoichiometric Relationships - Grade 12 Chemistry (IB) | Krit.club