9. State the differences between acids and bases.
10. Three liquids are given to you. One is hydrochloric acid; another is sodium hydroxide and third is a sugar solution. How will you identify them? You have only turmeric indicator.
11. A farmer was unhappy because of his low crop yield. He discussed the problem with an agricultural scientist and realised that the soil of his field was either too acidic or too basic. What remedy would you suggest the farmer to neutralise the soil?
Answers
Answer:
1. The solution can be either a base or a neutral solution. Acidic solutions change blue litmus red, hence it is not acidic. Bases change red litmus to blue hence there is no change in colour of blue litmus paper. Neutral solutions have no effect on litmus paper
2. Here, turmeric indicator is given to us. Turmeric is yellow in acidic and neutral solution and turns bright red in basic solution. ... One is hydrochloric acid which is acidic another is sodium hydroxide which is base thus, the solution is basic and lastly we have a sugar solution which will be neutral.
3. When the soil of his field is so acidic, it is to be treated with bases like slaked lime(calcium hydroxide) or quicklime(calcium oxide).
The organic matters are added to soil, if the soil of his field is so basic. Organic matter releases acids that neutralise the basic nature of the soil.
Explanation:
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