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A gas produced in the lab is highly soluble in water. Its colorless solution turns pink when a few drops of phenolphthalein is added to it. What is the nature of the gas
- a)Basic
- b)Neutral
- c)Acidic
- d)Amphoteric
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
A gas produced in the lab is highly soluble in water. Its colorless so...
The gas produced in lab is a base because when few drops of phenolphthalein is added to the gas it changes it's colour to pink and phenolphthalein only changes it's colour in basic solution .
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A gas produced in the lab is highly soluble in water. Its colorless so...
Basic because phenolphthalein ka colour basic solution me pink hota hai...
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A gas produced in the lab is highly soluble in water. Its colorless so...
Nature of the gas: Basic
Explanation:
When a gas is highly soluble in water and its colorless solution turns pink when phenolphthalein is added, it indicates that the gas is basic in nature. Let's understand why.
1. Solubility in water:
The fact that the gas is highly soluble in water suggests that it reacts with water molecules to form ions. Most basic gases, such as ammonia (NH3) or hydrogen sulfide (H2S), readily dissolve in water to produce hydroxide ions (OH-).
2. Phenolphthalein indicator:
Phenolphthalein is an indicator commonly used to determine the presence of bases or to differentiate between acidic and basic solutions. It is colorless in acidic solutions but turns pink or magenta in basic solutions with a pH greater than 8.2.
3. Color change:
The colorless solution of the gas turns pink when phenolphthalein is added, indicating the presence of hydroxide ions (OH-) formed by the reaction of the gas with water. This color change confirms the basic nature of the gas.
4. Acidic or amphoteric nature:
If the gas were acidic in nature, it would react with water to form hydronium ions (H3O+), and the phenolphthalein would remain colorless. Similarly, if the gas were amphoteric (having both acidic and basic properties), it would show a different color change or no color change at all with phenolphthalein.
Hence, based on the high solubility in water and the color change of the solution with phenolphthalein, the gas can be concluded to be basic in nature.
Explanation:
When a gas is highly soluble in water and its colorless solution turns pink when phenolphthalein is added, it indicates that the gas is basic in nature. Let's understand why.
1. Solubility in water:
The fact that the gas is highly soluble in water suggests that it reacts with water molecules to form ions. Most basic gases, such as ammonia (NH3) or hydrogen sulfide (H2S), readily dissolve in water to produce hydroxide ions (OH-).
2. Phenolphthalein indicator:
Phenolphthalein is an indicator commonly used to determine the presence of bases or to differentiate between acidic and basic solutions. It is colorless in acidic solutions but turns pink or magenta in basic solutions with a pH greater than 8.2.
3. Color change:
The colorless solution of the gas turns pink when phenolphthalein is added, indicating the presence of hydroxide ions (OH-) formed by the reaction of the gas with water. This color change confirms the basic nature of the gas.
4. Acidic or amphoteric nature:
If the gas were acidic in nature, it would react with water to form hydronium ions (H3O+), and the phenolphthalein would remain colorless. Similarly, if the gas were amphoteric (having both acidic and basic properties), it would show a different color change or no color change at all with phenolphthalein.
Hence, based on the high solubility in water and the color change of the solution with phenolphthalein, the gas can be concluded to be basic in nature.
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A gas produced in the lab is highly soluble in water. Its colorless solution turns pink when a few drops of phenolphthalein is added to it. What is the nature of the gasa)Basicb)Neutralc)Acidicd)AmphotericCorrect answer is option 'A'. Can you explain this answer?
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