Edexcel IGCSE·Science·IGCSE Science (Double Award)

Reactions, Acids & Rates

13 min read

The mole, acids and salts, rates of reaction and energy changes.

This chapter covers chemical calculations, acids and how fast reactions go.

The mole

$n = \frac{m}{M_r}$

Worked example. Moles in $50$ g of CaCO₃ ( $M_r = 100$ ): $n = \dfrac{50}{100} = 0.5$ mol.

Create a free account to read this note in full. Every free account gets 2 complete revision notes — no card needed.

Edexcel IGCSE·Science·IGCSE Science (Double Award)

13 min read

The mole, acids and salts, rates of reaction and energy changes.

This chapter covers chemical calculations, acids and how fast reactions go.

$n = \frac{m}{M_r}$

Worked example. Moles in $50$ g of CaCO₃ ( $M_r = 100$ ): $n = \dfrac{50}{100} = 0.5$ mol.

Create a free account to read this note in full. Every free account gets 2 complete revision notes — no card needed.