ANSWER Q2 Most indicators are weak acids of general formula HIn. Their dissociation in aqueous solution can be represented as: HIn H+ + In- colour A colour B [H+].[In-]. K indicator = [HIn]. At the end point, [In-] = [HIn] and therefore K indicator = [H+].
ANSWER Q2 Most indicators are weak acids of general formula HIn. Their dissociation in aqueous solution can be represented as: HIn H+ + colour A In- colour B K indicator = [H+].[In-]. [HIn]. At the end point, [In-] = [HIn] and therefore K indicator = [H+].
PhysicalChemistryVeryFinalNov16Nichola.docx