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What happens when excess carbon dioxide is passed through lime water?
- a)The lime water turns milky.
- b)The lime water turns green.
- c)The lime water turns yellow.
- d)The lime water milkiness disappears.
Correct answer is option 'D'. Can you explain this answer?
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What happens when excess carbon dioxide is passed through lime water?a...
Understanding Lime Water Reaction with Carbon Dioxide
When excess carbon dioxide is passed through lime water (a saturated solution of calcium hydroxide), a series of chemical reactions occur that ultimately lead to the observed outcomes.
Initial Reaction
- Lime water is clear due to the presence of calcium hydroxide (Ca(OH)2).
- When carbon dioxide (CO2) is introduced, it reacts with calcium hydroxide to form calcium carbonate (CaCO3).
Formation of Calcium Carbonate
- The reaction can be summarized as follows:
Ca(OH)2 + CO2 → CaCO3 + H2O
- Calcium carbonate is insoluble in water, leading to the formation of a white precipitate, which can make the lime water appear milky.
Excess Carbon Dioxide Impact
- If an excess amount of carbon dioxide is passed through the lime water, the following reaction takes place:
CaCO3 + CO2 + H2O → Ca(HCO3)2
- This reaction converts the precipitate (calcium carbonate) back into calcium bicarbonate (calcium hydrogen carbonate), which is soluble in water.
Final Observation
- As a result of this reaction, the initial milkiness of the lime water disappears, leading to a clear solution again.
- This explains why the correct answer is option 'D': The milkiness of the lime water disappears when excess carbon dioxide is passed through it.
In summary, the initial reaction creates a milky solution due to calcium carbonate formation, but excess CO2 causes the precipitation to dissolve, restoring the clarity of the lime water.
When excess carbon dioxide is passed through lime water (a saturated solution of calcium hydroxide), a series of chemical reactions occur that ultimately lead to the observed outcomes.
Initial Reaction
- Lime water is clear due to the presence of calcium hydroxide (Ca(OH)2).
- When carbon dioxide (CO2) is introduced, it reacts with calcium hydroxide to form calcium carbonate (CaCO3).
Formation of Calcium Carbonate
- The reaction can be summarized as follows:
Ca(OH)2 + CO2 → CaCO3 + H2O
- Calcium carbonate is insoluble in water, leading to the formation of a white precipitate, which can make the lime water appear milky.
Excess Carbon Dioxide Impact
- If an excess amount of carbon dioxide is passed through the lime water, the following reaction takes place:
CaCO3 + CO2 + H2O → Ca(HCO3)2
- This reaction converts the precipitate (calcium carbonate) back into calcium bicarbonate (calcium hydrogen carbonate), which is soluble in water.
Final Observation
- As a result of this reaction, the initial milkiness of the lime water disappears, leading to a clear solution again.
- This explains why the correct answer is option 'D': The milkiness of the lime water disappears when excess carbon dioxide is passed through it.
In summary, the initial reaction creates a milky solution due to calcium carbonate formation, but excess CO2 causes the precipitation to dissolve, restoring the clarity of the lime water.
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What happens when excess carbon dioxide is passed through lime water?a)The lime water turns milky.b)The lime water turns green.c)The lime water turns yellow.d)The lime water milkiness disappears.Correct answer is option 'D'. Can you explain this answer?? for Class 10 2025 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about What happens when excess carbon dioxide is passed through lime water?a)The lime water turns milky.b)The lime water turns green.c)The lime water turns yellow.d)The lime water milkiness disappears.Correct answer is option 'D'. Can you explain this answer?? covers all topics & solutions for Class 10 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What happens when excess carbon dioxide is passed through lime water?a)The lime water turns milky.b)The lime water turns green.c)The lime water turns yellow.d)The lime water milkiness disappears.Correct answer is option 'D'. Can you explain this answer??.
What happens when excess carbon dioxide is passed through lime water?a)The lime water turns milky.b)The lime water turns green.c)The lime water turns yellow.d)The lime water milkiness disappears.Correct answer is option 'D'. Can you explain this answer?? for Class 10 2025 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about What happens when excess carbon dioxide is passed through lime water?a)The lime water turns milky.b)The lime water turns green.c)The lime water turns yellow.d)The lime water milkiness disappears.Correct answer is option 'D'. Can you explain this answer?? covers all topics & solutions for Class 10 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What happens when excess carbon dioxide is passed through lime water?a)The lime water turns milky.b)The lime water turns green.c)The lime water turns yellow.d)The lime water milkiness disappears.Correct answer is option 'D'. Can you explain this answer??.
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