Find the common names of the following bases and calculate their molar masses .

1. Calcium Hydroxide
2. Sodium Hydroxide
3. Magnesium Hydroxide
4. Potassium Hydroxide
5. Ammonium Hydroxide

★ Calcium Hydroxide :

• Formula ➜ .

• Common Name ➜ Lime .

• Molar Mass ➜ 40+(16+1)×2 = 40+17×2 = 40+34 = 74 g/mol .

★ Sodium Hydroxide :

• Formula ➜ .

• Common Name ➜ Caustic Soda .

• Molar Mass ➜ 23+16+1 = 40 g/mol .

★ Magnesium Hydroxide :

• Formula ➜ .

• Common Name ➜ Milk of Magnesia .

• Molar Mass ➜ 24 + (16+1)×2 = 24 + 17×2 = 24+34 = 58 g/mol .

★ Potassium Hydroxide :

• Formula ➜ .

• Common Name ➜ Caustic Potash .

• Molar Mass ➜ 39+16+1 = 56 g/mol .

★ Ammonium Hydroxide :

• Formula ➜ .

• Common Name ➜ Ammonia Water .

• Molar Mass ➜ 14 + 1×4 + 16 + 1 = 31 + 4 = 35 g/mol .

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Explanation:

Formula ➜ \rm{Ca(OH)_2}Ca(OH)

2

.

• Common Name ➜ Lime .

• Molar Mass ➜ 40+(16+1)×2 = 40+17×2 = 40+34 = 74 g/mol .

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★ Sodium Hydroxide :

• Formula ➜ \rm{NaOH}NaOH .

• Common Name ➜ Caustic Soda .

• Molar Mass ➜ 23+16+1 = 40 g/mol .