Name: Structure of the Atmosphere
Uploaded: 2019-07-19
Duration: 6 min 14 s
Description: Let's explore the five layers of our atmosphere: troposphere, stratosphere, mesosphere, thermosphere and exosphere. What are they and why are they important?

Question

Write the word equations and chemical reactions for the reactions of potassium, phosphorus, sulphur and calcium with oxygen.

Accepted Answer

Metals react with oxygen and form basic oxides.

When potassium reacts with oxygen, potassium burns vigorously with a lilac flame forming an orange powder of potassium oxide.

The word equation for this reaction is:

$Potassium + Oxygen \to Potassium oxide + heat$

The balanced chemical reaction is:

$4 K + O_{2} \to 2 K_{2} O + heat$

When calcium reacts with oxygen, calcium burns with a bright brick-red flame, forming a white solid of calcium oxide.

The word equation for this reaction is:

$Calcium + Oxygen \to Calcium oxide + Heat$

The balanced chemical reaction is:

$2 Ca + O_{2} \to 2 CaO + heat$

Non-metals react with oxygen and form acidic oxides.

When phosphorus reacts with oxygen, phosphorus burns with a dazzling white flame, giving white fumes of phosphorus pentoxide.

The word equation for this reaction is:

$Phosphorus + Oxygen \to Phosphorus pentoxide + Oxygen$

The balanced chemical reaction is:

$4 P + 5 O_{2} \to 2 P_{2} O_{5} + Heat$

When sulphur reacts with oxygen, sulphur burns with a bright bluish flame, giving a pungent and suffocating smell of sulphur dioxide.

The word equation for this reaction is:

$Sulphur + Oxygen \to Sulphur dioxide + Heat$

The balanced chemical reaction is:

$S + O_{2} \to {SO}_{2} + Heat$

Write the word equations and chemical reactions for the reactions of potassium, phosphorus, sulphur and calcium with oxygen.

Important Questions on Air and Atmosphere

Learn and Prepare for any exam you want !