1.
State differences between acids and bases.
2. Ammonia is found in many household products, such as window cleaners. It turns red litmus blue, What is its nature?
3. Name the source from which litmus solution is obtained, What is the use of this solution?
4. Is the distilled water acidic/basic/neutral? How would you verify it?
5. Describe the process of neutralisation with the help of an example,
Answers
Answer:
1) State differences between acids and bases. Acids are sour in taste. Acids turn blue litmus red. Acids do not change the colour of red litmus.
2)Ammonia turns red litmus to blue so it is basic in nature.
3)Litmus solution is extracted from lichens. It is used to determine the solution is neutral/acidic/basic. It has a mauve (purple) colour in distilled water. When added to an acidic solution, it turns red.
4)Distilled water is neutral in character, i.e. it is neither acidic nor basic. Neutral nature of distilled water can be verified by the use of blue and red litmus paper. Distilled water does not change the colour of either blue or red litmus paper.
5)The reaction between an acid and bases is called a neutralization reaction. The result of the reaction is salt and water. For example, when hydrochloric acid(acid) and sodium hydroxide(base) react they form sodium chloride(salt) and water. Also, heat is evolved.
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A-1) ACID :-
- Acids have a sour taste.
- Acids have a sour taste. Acids react with bases to produce a salt compound and water.
- Acids have a sour taste. Acids react with bases to produce a salt compound and water.Acids react with active metals to yield hydrogen gas.
Acids have a sour taste. Acids react with bases to produce a salt compound and water.Acids react with active metals to yield hydrogen gas. BASE :-
- Bases are bitter in taste.
- Bases are bitter in taste.Bases change the colour of litmus from red to blue.
- Bases are bitter in taste.Bases change the colour of litmus from red to blue. Bases react with acids to form salt and water.
A-2) Ammonia turns red litmus to blue so it is basic in nature.
A-3) Litmus solution is extracted from lichens. It is used to determine the solution is neutral/acidic/basic. It has a mauve (purple) colour in distilled water. When added to an acidic solution, it turns red.
A-4) Distilled water is neutral. We can verify that by dipping red or blue litmus paper. There will be no change in colour due to neutral nature.
A-5) The reaction between an acid and bases is called a neutralisation reaction. The result of the reaction is salt and water. For example, when hydrochloric acid(acid) and sodium hydroxide(base) react they form sodium chloride(salt) and water. Also, heat is evolved.