1. Ageous solutions of all acids contain------ 2. Acids react with metal carbonates and metal hydrogen carbonates to form -----and ---- 3.---------is used as antacid. 4.The pH of an alkaline solution is--- 5.Nacl+H2O->Nach+H20 is an example of reaction.
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ACID, BASES AND SALTS (MODULE-1/4)
(WRITEUP)
• 115 elements combine to form different compounds.
• Based on chemical properties they are classified as acids, bases and salts.
• Salts are formed by combination of acids and bases
• These substances are identified using natural, synthetic and olfactory
indicators.
INDICATORS FOR TESTING ACIDS AND BASES:
• Indicators are those chemical substances which behave differently in
acidic and basic medium and help in determining the chemical nature
of the substance.
Acid base indicators indicate the presence of an acid or a base by a
change in their colour or smell.
• NATURAL INDICATORS:
Litmus solution is purple dye (neutral)extracted from lichen,we get as
blue litmus or red litmus
Litmus solution / paper changes from Blue to Red when it is dipped in Acid