Question 9
The speed at which the chemical change of steel rusting varies with conditions and composition. The graphs below show how the amount of rusting depends upon composition of the steel, pH and temperature.
a. Write a word equation and a chemical equation for the rusting process. [1 point]
| Word equation | |
| --- | --- |
| | |
| Chemical equation | |
| | |
b. Identify two (2) conditions that helped reduced rusting of steel. [2 points]
c. Steel rusts by the chemical combination of iron (in steel) with oxygen and water in the air. Suggest and explain one way that rusting of steel can be prevented. [2 points]
| Method | Reason |
| --- | --- |
| | |
a. Write a word equation and a chemical equation for the rusting process. [1 point]
| Word equation | |
| --- | --- |
| | |
| Chemical equation | |
| | |
b. Identify two (2) conditions that helped reduced rusting of steel. [2 points]
c. Steel rusts by the chemical combination of iron (in steel) with oxygen and water in the air. Suggest and explain one way that rusting of steel can be prevented. [2 points]
| Method | Reason |
| --- | --- |
| | |