Chemical Formulae, Equations and Calculations Part 1
3 marks · EasyThe following table shows substances involved in a chemical reaction:
| Substance | State Symbol |
|---|---|
| iron(III) oxide | |
| carbon monoxide | |
| iron | |
| carbon dioxide |
Complete the table with the correct state symbols and write the balanced chemical equation including state symbols for the reaction where iron(III) oxide reacts with carbon monoxide to produce iron and carbon dioxide.
Complete the table with the correct state symbols.
Write the balanced chemical equation for this reaction, including state symbols.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
(a) — · must show iron(III) oxide (Fe2O3): (s), carbon monoxide (CO): (g), iron (Fe): (s), carbon dioxide (CO2): (g)
(b) \ce{Fe2O3(s) + 3CO(g) -> 2Fe(s) + 3CO2(g)} · must show Balanced equation, Correct formulae and state symbols
Common mistakes: Wrong state for CO (aq) or iron (g); Unbalanced equation
Show mark scheme and worked solution
Marking points
B1 (a) · 1 mark · All state symbols correct (Fe2O3(s), CO(g), Fe(s), CO2(g)).
M1 (b) · 1 mark · Writes the correct formulae with matching state symbols.
A1 (b) · 1 mark · Gives the fully balanced chemical equation.
Worked solution
| Substance | State Symbol |
|---|---|
| iron(III) oxide | (s) |
| carbon monoxide | (g) |
| iron | (s) |
| carbon dioxide | (g) |
Balanced equation: Fe2O3(s) + 3CO(g) -> 2Fe(s) + 3CO2(g)