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acids and bases - Coggle Diagram

- - - - china rose
        
        how we use china rose flower as an indicator?
        
        add hot water to the petals of china rose in a beaker and let it rest for some times
        
        the flower of China rose possess a good ability of detecting acids and bases
        
        This solution can be used as an indicator when drops of this are added to an acidic solution then the color of the solution changes to magenta red or a slightly different shade of red for that matter. When added to an alkaline solution the color of the alkali changes to green or yellowish green to be precise, the solutions change color in very less time.
      - litmus paper
        
        symbiotic relation of algae and fungi gives us unit called lichens. the major function of lichens in an ecosystem is that they act as a pollution indicator their growth is hindered when there is excessive pollution as a result chemical changes in the body of lichens can give us indications of the nature of substance says that come in contact with them so a substance extracted from a lichens body called litmus is used as a natural indicator for chemical purposes especially in detecting the acidic and basic nature of solutions, the litmus obtained from a lichens body is a mixture of some dyes that are usually absorbed on a filter paper.
        
        this paper made with litmus on it is used as an indicator for detecting acids and bases two colors of litmus papers are usually available red litmus paper and blue litmus paper.
        
        The red litmus paper when comes in contact with an acid displays no color change but turns blue in presence of a base in contrast of this the blue litmus paper turns red on contacting an acid while it remains unchanged in a basic solution this is how several compounds are used as indicators that help us in detecting the acidic and alkaline nature of solutions.