Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074



Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

Mg is oxidized by KCIO4, to make white flashes. One product of the reaction is KCI. Write a balanced equation for the reaction.

Interpretation Introduction

Interpretation: Balanced equation should be written for the reaction where Mg is oxidized by KClO4 to make white flashes.

Concept introduction:

In a balanced equation the number of atoms of each element as a reactant is equal to the number of atoms of that element as a product.

Coefficient is a number placed before a formula in a chemical equation.

A balanced equation should be obeying the law of conservation of mass. Law of conservation of mass states that, the number of atoms remains constant throughout the reaction, simply it can be stated as follows, “during a chemical reaction atoms are neither be created nor be destroyed”.


Here to get white lights during fireworks magnesium is oxidized with KClO4 at very high temperature. KCl is the one product that formed during this reaction. Another product is the oxide of magnesium.

The reaction can be represnted as,


The above reaction is unbalanced because there are four oxygen atom atom on the left side of the equation and on the right side its number is reduced

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