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SQA National 5 Chemistry Formulae and equations

Formulae and equations

This page covers the following topics:

1. Balancing equations

A balanced equation is a model of a chemical reaction that shows the formulae of the reactants and the products. In order for an equation to be balanced, the number of atoms must be equal on both sides of the equation.

Balancing equations

1

Balance the equation Sβ‚ˆ + Fβ‚‚ β†’ SF₆.

Balance the equation Sβ‚ˆ + Fβ‚‚ β†’ SF₆.

2

Balance the equation Nβ‚‚ + Hβ‚‚ β†’ NH₃.

Balance the equation Nβ‚‚ + Hβ‚‚ β†’ NH₃.

3

Balance the equation Zn + HCl β†’ ZnClβ‚‚ + Hβ‚‚.

Balance the equation Zn + HCl β†’ ZnClβ‚‚ + Hβ‚‚.

4

Carbon monoxide reacts with hydrogen to produce octane and water. What is the balanced equation for this reaction?

Carbon monoxide reacts with hydrogen to produce octane and water. What is the balanced equation for this reaction?

5

The reaction of iron(III) oxide and hydrogen results in the formation of iron and water. What is the balanced equation for this reaction?

The reaction of iron(III) oxide and hydrogen results in the formation of iron and water. What is the balanced equation for this reaction?

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