5. Is the meaning of 'weak acid' the same as that of 'dilute acid'?
6. State the differences between acids and bases.
7. 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.
8. 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
Explanation:
5. The key difference between weak acid and dilute acid is that weak acid is a compound that partially dissociates when dissolved in water, whereas dilute acid is a solution containing more water than acid
6. A substance, mostly liquid that donates a proton or accepts an electron pair in reactions. An acid increases the concentration of H+ ions. A base is a substance that releases hydroxide (OH-) ions in aqueous solution, donates electrons and accepts protons
7. 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.
8. 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.