Question 1
Name the solid product when magnesium reacts with steam.
Need a hint for Question 1?
Identify the reagent: oxygen, cold water, steam or dilute acid.
Check Question 1
Magnesium oxide, MgO.
STUDENT SPACE · TOPIC 2
Reactions with water and acids
Predict metal reactions and write balanced equations.
The essentials
- Many metals react with oxygen to form metal oxides. Burning magnesium forms white magnesium oxide.
- Potassium and sodium react vigorously with cold water. Calcium reacts less vigorously.
- Magnesium reacts very slowly with cold water. Heated magnesium reacts with steam.
Key vocabulary
| English | Chinese |
|---|---|
| steam | 水蒸气 |
| effervescence | 冒气泡 |
| dilute acid | 稀酸 |
Quick practice
Try each question before opening its hint or answer. Use paper for calculations and diagrams.
Question 2
Write a balanced equation for calcium reacting with cold water.
Need a hint for Question 2?
A metal with cold water gives hydroxide and hydrogen.
Check Question 2
Ca + 2H₂O → Ca(OH)₂ + H₂
Question 3
Predict the result of adding copper to dilute hydrochloric acid. Explain.
Need a hint for Question 3?
Locate copper relative to hydrogen.
Check Question 3
No reaction producing hydrogen. Copper is below hydrogen in the reactivity series.
Use Lesson 2 in your worksheet for written practice. Your teacher will discuss those answers in class.