Chemical Properties Of Matter

ACIDIC, ALKALINE AND NEUTRAL

1. Different substances have different chemical properties.
2. Substances can be classified as having these properties:

•  acidic
• alkaline
• neutral

     3.  A substance can be tested to see if it is acidic, alkaline or neutral using a litmus paper.

   

Acidic Substances

1. An acidic substance has a sour taste.
2. It change blue litmus paper to red.
3. If the acidic substance is tested with a red litmus paper, no colour change will be seen.
4. A strong acidic is corrosive and can burn the skin.

orange

          



grapes 

pineapple

lemon

mango

apple cider vinegar

                  Figure 1: Acidic substances

Alkaline Substances

1. Alkaline substances taste bitter and feel 'soapy' to touch.
2. It change red litmus paper to blue.
3. If the alkaline substance is tested with a blue litmus paper, no colour change will be seen.
4. A strong alkaline is corrosive and can burn the skin.

detergent powder

bitter gourd

soap

body shampoo

toothpaste

Figure 2: Alkaline substances  

Neutral Substances

1. A neutral substance does not have an acidic or alkaline properties.
2. It will not change the colour of blue or red litmus paper.
3. If an acidic substance is mixed with an alkaline substance, a neutral substance is formed.

cocking oil

mineral water

sugar

rice

honey

bread

           

                                            

Figure 3: Neutral substances