What is observed when carbon dioxide gas is passed through lime water (I) for short duration and long duration?

Question

Answer

For short duration it turns milky due to formation of calcium carbonate. but after long duration it becomes disappear due to formation of calcium oxide and carbon dioxide gas

Answer

When CO2 is passed through limewater (i). for short interval of time limwater turns milky due to formation oh white precipitate of CaCO3 Ca(OH)2 +CO2 = CaCO3 + H2O (ii)if it is passed from considerable time CaCO3 reacts with CO2 to form Ca(HCO3)2 which is soluble in water.The milkiness disappears. CaCO3 + CO2 +H2O= Ca(HCO3)2..

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Lime water turns milky due to the formation of calcium carbonate

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Lime water will become milky because calcium carbonate will formed which is insoluble in water..

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**Observations when carbon dioxide gas is passed through lime water for a short duration:**

- **Formation of a white precipitate:** When carbon dioxide gas is passed through lime water (also known as calcium hydroxide solution or slaked lime), a white precipitate of calcium carbonate is formed. This can be observed as the solution turns milky or cloudy.

- **Reversible reaction:** The reaction between carbon dioxide and lime water is a reversible reaction. When carbon dioxide is passed through lime water, it reacts with calcium hydroxide to form calcium carbonate, as shown by the equation: CO2 + Ca(OH)2 → CaCO3 + H2O.

- **Solubility of calcium carbonate:** Calcium carbonate is sparingly soluble in water, which is why it forms a precipitate when carbon dioxide reacts with lime water. The white precipitate is composed of tiny calcium carbonate particles that do not dissolve completely in the solution.

**Observations when carbon dioxide gas is passed through lime water for a long duration:**

- **Complete reaction:** When carbon dioxide gas is continuously passed through lime water for a long duration, the white precipitate of calcium carbonate gradually dissolves. This happens because the carbon dioxide reacts with the formed calcium carbonate, resulting in the formation of soluble calcium bicarbonate.

- **Formation of a clear solution:** As the reaction progresses, the initially milky or cloudy solution of lime water becomes clear again. This indicates that the calcium carbonate precipitate has dissolved due to the continuous reaction with carbon dioxide.

- **Formation of calcium bicarbonate:** The reaction between carbon dioxide and calcium carbonate leads to the formation of calcium bicarbonate, which is soluble in water. The equation for this reaction is: CO2 + CaCO3 + H2O → Ca(HCO3)2. The calcium bicarbonate formed remains dissolved in the solution, making it clear.

- **Equilibrium state:** Eventually, an equilibrium state is reached where the rate of formation of calcium bicarbonate from the reaction between carbon dioxide and calcium carbonate is equal to the rate of decomposition of calcium bicarbonate back into carbon dioxide and calcium carbonate. At this point, the solution remains clear.

In summary, passing carbon dioxide gas through lime water initially results in the formation of a white precipitate of calcium carbonate, which gradually dissolves as the reaction progresses. This is due to the reversible reaction between carbon dioxide and calcium hydroxide, leading to the formation of calcium carbonate and water. With continuous passage of carbon dioxide, the equilibrium state is reached, and the solution remains clear due to the formation of soluble calcium bicarbonate.

Answer

It turns milky I guess

Answer

It become milky....i think

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