Transcription of Notes ACIDS, BASES AND SALTS
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Acids, BASES and SaltsSCIENCE AND TECHNOLOGY 154 NotesMODULE - 2 Matter in our Surroundings8 ACIDS, BASES AND SALTSFrom generations, our parents have been using tamarind or lemon juice to give shinylook to the copper vessels. Our mothers never store pickles in metal salt and sugar has often been used as an effective preservative. How didour ancestors know that tamarind, lemon, vinegar, sugar etc. works effectively? Thiswas common collective wisdom which was passed from generation to days, bleaching powder, baking soda etc. are commonly used in our must have used various cleaners to open drains and pipes and window panecleaners for sparkling glass.
identified the ions furnished by acids and bases responsible for their characteristic behaviour and gave their definitions. 8.1.1 Acids An acid is a substance which furnishes hydrogen ions (H +) when dissolved in water. For example, in its aqueous solution hydrochloric HCl (aq) dissociates as: HCl (aq) H + (aq) + Cl (aq) Some examples of acids are:
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