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Stoichiometry

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

Relative atomic mass and relative molecular mass

Subtopic

Relative atomic mass and relative molecular mass under Stoichiometry for Grade 11 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Find the relative formula mass of silver nitrate (AgNO3AgNO_3). (Given ArA_r: Ag=108,N=14,O=16Ag=108, N=14, O=16)

    A.

    154

    B.

    170

    C.

    162

    D.

    138

  2. 2.

    Calculate the MrM_r of sodium oxide (Na2ONa_2O). (Given ArA_r: Na=23,O=16Na=23, O=16)

    A.

    39

    B.

    46

    C.

    54

    D.

    62

  3. 3.

    What is the MrM_r of potassium bromide (KBrKBr)? (Given ArA_r: K=39,Br=80K=39, Br=80)

    A.

    119

    B.

    120

    C.

    118

    D.

    129

Download the worksheet for Stoichiometry - Relative atomic mass and relative molecular mass to practice offline. It includes additional chapter-level practice questions.

The mole concept

Subtopic

The mole concept under Stoichiometry for Grade 11 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is the empirical formula of phosphorus(V) oxide, P4O10P_4O_{10}?

    A.

    PO2PO_2

    B.

    P2O5P_2O_5

    C.

    PO3PO_3

    D.

    P4O10P_4O_{10}

  2. 2.

    If a sample of helium gas (HeHe) occupies 2.4 dm3dm^3 at r.t.p., what is its mass? (He=4He=4)

    A.

    0.4 g

    B.

    4 g

    C.

    40 g

    D.

    0.1 g

  3. 3.

    What is the MrM_r of sugar (glucose), C6H12O6C_6H_{12}O_6? (C=12,H=1,O=16C=12, H=1, O=16)

    A.

    180

    B.

    150

    C.

    100

    D.

    90

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

Empirical and molecular formulae

Subtopic

Empirical and molecular formulae under Stoichiometry for Grade 11 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    A sample contains 0.1 moles of Iron and 0.15 moles of Oxygen. What is the empirical formula of the oxide?

    A.

    FeOFeO

    B.

    Fe2O3Fe_2O_3

    C.

    Fe3O2Fe_3O_2

    D.

    FeO2FeO_2

  2. 2.

    What is the empirical formula of cyclohexane (C6H12C_6H_{12})?

    A.

    CHCH

    B.

    CH2CH_2

    C.

    C3H6C_3H_6

    D.

    C6H12C_6H_{12}

  3. 3.

    If the empirical formula of a compound is CHCH, which of the following is NOT a possible molecular formula?

    A.

    C2H2C_2H_2

    B.

    C6H6C_6H_6

    C.

    C4H4C_4H_4

    D.

    C3H6C_3H_6

Download the worksheet for Stoichiometry - Empirical and molecular formulae to practice offline. It includes additional chapter-level practice questions.

Reacting masses and volumes

Subtopic

Reacting masses and volumes under Stoichiometry for Grade 11 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is the relative atomic mass (ArA_r) of Carbon?

    A.

    6

    B.

    12

    C.

    14

    D.

    16

  2. 2.

    Convert 2.5 dm32.5\ dm^3 to cm3cm^3.

    A.

    25

    B.

    250

    C.

    2500

    D.

    25000

  3. 3.

    What is the MrM_r of calcium oxide, CaOCaO? (Ar:Ca=40,O=16A_r: Ca=40, O=16)

    A.

    40

    B.

    56

    C.

    72

    D.

    80

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

Concentration and titrations

Subtopic

Concentration and titrations under Stoichiometry for Grade 11 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    When recording titration data, what are 'concordant' titres?

    A.

    Titres that are exactly the same as the rough titration

    B.

    Titres that are within 0.1 cm30.1\ cm^3 of each other

    C.

    Titres that are within 1.0 cm31.0\ cm^3 of each other

    D.

    The first two titres recorded

  2. 2.

    How many moles are in 100 cm3100\ cm^3 of a 2.0 mol/dm32.0\ mol/dm^3 solution?

    A.

    0.02 mol0.02\ mol

    B.

    0.2 mol0.2\ mol

    C.

    2.0 mol2.0\ mol

    D.

    20 mol20\ mol

  3. 3.

    The molar mass of HClHCl is 36.5 g/mol36.5\ g/mol. What is the concentration in g/dm3g/dm^3 of a 1.0 mol/dm31.0\ mol/dm^3 HClHCl solution?

    A.

    1.0 g/dm31.0\ g/dm^3

    B.

    36.5 g/dm336.5\ g/dm^3

    C.

    73.0 g/dm373.0\ g/dm^3

    D.

    0.365 g/dm30.365\ g/dm^3

Download the worksheet for Stoichiometry - Concentration and titrations to practice offline. It includes additional chapter-level practice questions.

Stoichiometry - IGCSE Grade 11 Chemistry Notes & Revision | Krit.club