Skip to content

Course home

3.2 Use of amount of substance in relation to masses of pure substances

3.2 Use of amount of substance in relation to masses of pure substances

EasyMediumHard
12345678910111213141516171819202122232425262728
Question 5

Silicon tetrachloride (SiCl4\text{SiCl}_4SiCl4​) is produced by reacting silicon dioxide (SiO2\text{SiO}_2SiO2​) with chlorine gas and carbon according to the equation:

[SiO2+2Cl2+2C→SiCl4+2CO [\text{SiO}_2 + 2\text{Cl}_2 + 2\text{C} \rightarrow \text{SiCl}_4 + 2\text{CO} [SiO2​+2Cl2​+2C→SiCl4​+2CO

]

Calculate the volume of chlorine gas needed to react completely with 120 kg120\text{ kg}120 kg of silicon dioxide. (Relative atomic masses (ArA_rAr​): O=16\text{O} = 16O=16, Si=28\text{Si} = 28Si=28; the volume of one mole of gas is 24 dm324\text{ dm}^324 dm3.)

[5]
Markscheme

3.2 Use of amount of substance in relation to masses of pure substances Questions

  1. GCSE
  2. /Chemistry
  3. /3.2 Use of amount of substance in relation to masses of pure substances

38 exam-style questions on AQA GCSE Chemistry 3.2 Use of amount of substance in relation to masses of pure substances, covering 3.2.1 Moles (HT only), 3.2.2 Amounts of substances in equations (HT only), 3.2.3 Using moles to balance equations (HT only), 3.2.4 Limiting reactants (HT only), and 3.2.5 Concentration of solutions. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank