Chapter U1.17, Problem 5E

Interpretation Introduction

Interpretation:

Two combinations of compounds must be named which can be used for creating red and purple fireworks display.

Concept introduction:

Different chemicals can be used to generate fireworks display of the desired color.

Generally, highly combustible materials are used in the firework displays.

Answer to Problem 5E

Strontium carbonate can be used for making red fireworks.

Strontium carbonate and copper carbonate mixture can be used for purple fireworks.

Explanation of Solution

Strontium carbonate undergoes thermal decomposition and imparts the red color due to the removal of an electron from strontium which jumps back to the ground state.

A mixture of strontium carbonate and copper carbonate when heated is decomposed and the color of copper which is blue-green and that of strontium which is red is mixed resulting in purple color.

Conclusion

Strontium carbonate can be used for red firework and a mixture of strontium carbonate and copper carbonate can be used for the purple firework.