Acids & Bases For Secondary Students
Published on Nov 19, 2015
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PRESENTATION OUTLINE
ACIDS AND BASES
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BASICITY OF ACID
The max no. of H+ ions produced by a molecule of an acid
Basicity of acids
Monobasic - produce one H+ ion
(HCl, HNO3, CH3COOH)
Dibasic - produce two H+ ions
(H2SO4)
Monobasic - produce one H+ ion
(HCl, HNO3, CH3COOH)
Dibasic - produce two H+ ions
(H2SO4)
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STRENGTH
STRONG AND WEAK ACIDS
Strong Acids: one that completely (has all it's molecules) ionizes in water.
Examples:
1. HCl
2. H2SO4
Weak Acids: one that partially ionizes in water.
Examples:
1. CH3COOH
2. H2CO3
Examples:
1. HCl
2. H2SO4
Weak Acids: one that partially ionizes in water.
Examples:
1. CH3COOH
2. H2CO3
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ALKALIS
A SUBSTANCE THAT PRODUCES OH- IN WATER
Mainly metals from Group 1 that can form alkalis (soluble bases)
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STRENGTH
STRONG AND WEAK ALKALIS
Strong Alkalis: one that completely (has all it's molecules) ionizes in water.
Examples:
1. NaOH
2. KOH
Weak Alkalis: one that partially ionizes in water.
Examples:
1. NH3
Examples:
1. NaOH
2. KOH
Weak Alkalis: one that partially ionizes in water.
Examples:
1. NH3
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pH
A MEASURE OF THE ACIDITY AND ALKALINITY OF A SOLUTION
The scale of pH is from 0- 14
0-6 : acidic
7: neutral
8-14 : alkaline
0-6 : acidic
7: neutral
8-14 : alkaline
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INDICATORS
A SUBSTANCE THAT HAS DIFFERENT COLOURS IN ACIDIC AND ALKALINE SOLUTION
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