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. We will also be learning about pH a measureof acidity and its importance in our completing this lesson you will be able to: define the terms acid , base , salt and indicator; give examples of some common household acids, BASES , SALTS and suggestsuitable indicators; describe the properties of acids and BASES ; differentiate between strong and weak acids and BASES ; explain the role of water in dissociation of acids and BASES ; explain the term ionic product
8.2 PROPERTIES OF ACIDS AND BASES Each substance shows some typical or characteristics properties. We can categorize a substance as an acid or a base according to the properties displayed. Let us learn the characteristic properties of acids and bases. 8.2.1 Properties of Acids The following are the characteristic properties of acids: 1. Taste
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