Characteristics of the indicators ,acids and bases
Answers
Answer:
Easily detectable colour change
Sharp colour-change point
Cheap
Non-toxic
Explanation:
The obvious ones are a sharp easily detected colour change but don't forget that this should take place at the correct pH to match the acid or base being titrated.
ANSWER:
Characteristics of Acids:
=> Sour/Tart in taste.
=> React with metals to produce gases.
=> Feels like water.
=> Turns indicator paper red.
=> Begin with H+
=> Some common acids are Nitric acid, sulfuric acid and Acetic acid etc.
Characteristics of Bases:
=> Bitter in taste.
=> Will not react with metals.
=> Feel slippery.
=> Turns indicator paper blue.
=> -OH ending.
=> Some common bases are Sodium Hydroxide, Potassium Hydroxide and Ammonia etc.
Indicators:
=> Indicators are organic substance which changes their colour or symptoms to show whether a particular solution is acidic or basic in nature.
=> Types of Indicators:
1). Acid base Indicators:
- These indicators are also known as pH indicators.
- These are substances which change colour with pH.
- These are usually weak acids and weak bases.
- Methyl orange is an example of Acid base indicators.
2). Olfactory indicators:
- These are substances which change their smell when mixed with acid or base.
- Onion is an olfactory indicator. When onion is mixed with an base it gives off its pungent smell, but with an acid it retains its pungent odour.
3). Natural indicators:
- Indicators obtained from natural substances are Natural indicators.
- Red cabbage, Turmeric, Litmus are all natural indicators which change colour in acidic and basic solutions.