you are given three unlabelled bottles A, B and C CONTAINING colourless solutions such thatone of them is acid the other being basic and neutral how will you distinguish between them by using china rose as an indicator
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Acids: The substance which has sour taste and acidic properties is known as acid.
Acidic Substances; The substances which have sour taste are called acidic substances.
Acidus/ Acere: The term acid has been derived from the Latin word Acidus or Acere.
Natural Acids: The acids which are found in plants and animals are commonly called natural acids or organic acids.
Mineral Acids: The acids which are prepared from non-living things like the minerals of the Earth by chemical means are called mineral acids.
Bases: The substances which have a bitter taste and soapy ( slippery) touch are known as bases. The nature of bases is basic.
Indicators: The special types of substances, which change their colour when come in contact with acidic or basic substances are called indicators. These are used to test whether a substance is acidic or basic.
Neutral substances: The substances which are neither acid, nor basic and do not affect indicators are called neutral substances. Ex. Distilled water
Acid Rain: Rain containing traces of mineral acids, such as Hydrochloric Acid (HCl), Nitric Acid ( HNO3) is called acid rain.
Neutralisation: The process due to which an acid completely reacts with a base with the evolution of heat to form salt and water as the products is called Neutralisation. It is the reaction between an acid and a base producing salt and water with the evolution of heat.
Salt: A new substance obtained by neutralization of an acid with a base is called salt.Salt may be acidic, basic or neutral in nature.
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Answer:
To find the effect of acidic/basic and neutral solution on the china rose solution as an indicator.
* We can take a fistful of china rose petals in a bowl. Soak the petals in the boiling water for half an hour. On cooling, crush the petals with hand and then filter the mixture. We will get pink coloured clear solution, which can be used as an indicator.
* Now, we will take 1cc of china rose solution in a test tube and to it add few drops of soap solution. Shake the contents. We will notice that colour of the solution changes to green.
* We will notice that pink colour of china rose solution changes to green colour in case of solutions of soap, shampoo, baking soda and limewater. These solutions are basic in nature.
* We will notice that pink colour of china rose solution changes to deep pink colour in case of aerated water, lemon juice, hydrochloric acid and nitric acid. These solutions are acidic in character.
* We will notice that pink colour of china rose solution does not change in case of common salt solution. This solution is neutral in nature.
Explanation: