Balanced equations and reacting masses

Balanced equations and reacting masses Quiz

Spec 1.7 · Edexcel International A Level Chemistry: Quiz

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  1. 1. Which is the ionic equation for the reaction of aqueous barium chloride with aqueous sodium sulfate?

    • A. Ba2+(aq) + SO4 2-(aq) → BaSO4(s)
    • B. BaCl2(aq) + Na2SO4(aq) → BaSO4(s) + 2NaCl(aq)
    • C. Na+(aq) + Cl-(aq) → NaCl(s)
    • D. Ba(aq) + SO4(aq) → BaSO4(s)

  2. 2. What mass of CaCO3 (M = 100.1 g mol-1) is needed to make 0.250 mol of CO2 in CaCO3 → CaO + CO2?

    • A. 12.5 g
    • B. 25.0 g
    • C. 50.0 g
    • D. 100 g

  3. 3. Magnesium (0.200 mol) is added to 0.300 mol of HCl, Mg + 2HCl → MgCl2 + H2. Which is the limiting reagent?

    • A. Magnesium, because there is less of it
    • B. HCl, because it would need 0.400 mol of HCl for all the magnesium
    • C. Neither, as they are in the ratio 2 : 3
    • D. The hydrogen produced

  4. 4. What is seen when chlorine water is added to potassium bromide solution?

    • A. Nothing, because chlorine is less reactive than bromine
    • B. A white precipitate forms
    • C. The solution turns blue
    • D. The solution turns orange

  5. 5. In Zn(s) + 2H+(aq) → Zn2+(aq) + H2(g), what is observed?

    • A. A blue solution forms
    • B. A white precipitate forms
    • C. Zinc dissolves with effervescence
    • D. A brown solid forms

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