ACID AND BASE

ACID AND BASE

Activity 2.1

I.       Purpose                                 :

Definite characterictic of acid and base.

II.       Basic Theory                         :

              Acids and bases are two darting through the class of chemicals is important. In everyday life, we know of many substances that we have classified as an acid, eg acetic acid, citric acid, tamarind, sour starfruit, and "sour stomach". One of the acidic nature is a sour taste. We also know the various substances that we classify as a base, such as whiting, caustic soda, water, soap, and water ash. One of the basic character is to dissolve fat, which is why ash (ash) is used for washing dishes.

              Although acids and bases have different tastes, it is not wise to indicate acidity and alkalinity in a way to taste it, because of the many that can damage the skin and toxic. Now there is a practical way to determine the acid and alkaline a substance is by using the acid-base indicator (litmus paper).

III.       Materials and Equipments      :

·           10 mL vinegar

·           10 mL soap solution

·           10 mL lime solution

·           10 mL sprite

·           10 mL aquades

·           Shoes flower extract(10 shoes flower pounded + water, then filter the exstract), colour of extract is purple.

·           1  pipette

·           5 Glass

IV.       Step Work                           :

1.      Pour the all solution in the 5 glass, give name in every solution, the next see the colour and write the colour.

2.     Take shoes flower extract with pipette, next drop in the 5 glass, every glass 4 drop. See change the colour and write in the table.

No	Material	Colour
		Before add flower extract	After add flower extract
1	10 mL Vinegar
2	10 mL soap solution
3	10 mL lime soap
4	10 mL sprite
5	10 mL aquades

V.       Task                                     :

1.      Where material/solution whoincluded in the acid, base and netral?

2.     Mention the characterictic of acid and base solution