EasyChemistryHigh School (9–10)GeneralMetals and Non-metals › Reactions and the Reactivity SeriesNumerical
Write the balanced equation for each. Sodium burns in oxygen.
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Write the balanced equation for each.
- Sodium burns in oxygen.
- Magnesium burns in oxygen.
- Aluminium reacts with oxygen.
- Copper is heated in air.
What do you see in (b) and (d)?
Need a reminder? The key ideaShow
Metals form basic oxides; aluminium and zinc oxides are amphoteric. Reactivity with water: K, Na violent; Ca cold water; Mg hot water; Al, Zn, Fe steam; Pb, Cu, Ag, Au none. Metals above hydrogen give hydrogen with dilute acids. A metal displaces those below it from their salt solutions.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. (a) .
Step 2. (b) : a dazzling white flame and white ash.
Step 3. (c) .
Step 4. (d) : the copper turns black.
Answer: as above.
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