Transcription of Notes ACIDS, BASES AND SALTS
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Notes ACIDS, BASES AND SALTS
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. How do these chemicals work? In this lesson we willtry to find answers to these questions. Most of these examples can be classified asacids, BASES or SALTS . In this unit we shall categorize these substances. We shall studyabout their characteristic properties.
acids like acetic acid and some inorganic acids are weak acids. Since their dissociation is only partial, it is depicted by double half arrows. HF(aq) H+ (aq) + F (aq) The double arrows indicates here that (i) the aqueous solution of hydrofluoric acid not only contains H + (aq) and F (aq) ions but also the undissociated acid HF(aq).
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