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pgnameArray[arrayIndex++] = '01  Lesson Introduction';
pgnameArray[arrayIndex++] = '02  Acids, Alkalis and Indicators';
pgnameArray[arrayIndex++] = '03  Acids, Alkalis and Salts';
pgnameArray[arrayIndex++] = '04  Indicators';
pgnameArray[arrayIndex++] = '05  Measuring pH Strength';
pgnameArray[arrayIndex++] = '06  Properties of Acids';
pgnameArray[arrayIndex++] = '07  Reactions of Acid';
pgnameArray[arrayIndex++] = '08  Test for Hydrogen and Carbon Dioxide';
pgnameArray[arrayIndex++] = '09  Properties of Alkalis';
pgnameArray[arrayIndex++] = '10  Reactions of Alkalis';
pgnameArray[arrayIndex++] = '11  Neutralisation and Making Salts';
pgnameArray[arrayIndex++] = '12  Progress Question';
pgnameArray[arrayIndex++] = '13  Neutralisation and Making Salts 2';
pgnameArray[arrayIndex++] = '14  Progress Question';
pgnameArray[arrayIndex++] = '15  Bases';
pgnameArray[arrayIndex++] = '16  Making Salts';
pgnameArray[arrayIndex++] = '17  Making Sodium Chloride by Titration';
pgnameArray[arrayIndex++] = '18  Making Salts 2';
pgnameArray[arrayIndex++] = '19  Progress Question';
pgnameArray[arrayIndex++] = '20  Useful Products from Salts';
pgnameArray[arrayIndex++] = '21  Electrolysis of Brine';
pgnameArray[arrayIndex++] = '22  Electrolysing Brine';
pgnameArray[arrayIndex++] = '23  Progress Question';
pgnameArray[arrayIndex++] = '24  CFCs and the Environment';
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pgnameArray[arrayIndex++] = '01  Lesson Introduction';
pgnameArray[arrayIndex++] = '02  Acids, Alkalis and Indicators';
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pgnameArray[arrayIndex++] = '07  Reactions of Acid';
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pgnameArray[arrayIndex++] = '18  Making Salts 2';
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pgnameArray[arrayIndex++] = '23  Progress Question';
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pgnameArray[arrayIndex++] = '25  Lesson Summary';
}