(i) The substance used for whitewashing is calcium oxide, commonly known as quicklime. Its chemical formula is CaO. (ii) The reaction of calcium oxide (quicklime) with water is an exothermic reaction, and it produces calcium hydroxide, commonly known as slaked lime. The balanced chemical equation foRead more
(i) The substance used for whitewashing is calcium oxide, commonly known as quicklime. Its chemical formula is CaO.
(ii) The reaction of calcium oxide (quicklime) with water is an exothermic reaction, and it produces calcium hydroxide, commonly known as slaked lime. The balanced chemical equation for this reaction is:
CaO + H₂O → Ca(OH)₂
In words, quicklime reacts with water to form calcium hydroxide.
To provide a more accurate response, I would need additional details about "Activity 1.7" and the gases involved. However, I can offer a general explanation for why the amount of gas collected in one test tube might be double that of another. If the activity involves the reaction of a metal with anRead more
To provide a more accurate response, I would need additional details about “Activity 1.7” and the gases involved. However, I can offer a general explanation for why the amount of gas collected in one test tube might be double that of another.
If the activity involves the reaction of a metal with an acid, such as zinc with hydrochloric acid, the balanced chemical equation for the reaction is:
Zn + 2HCl → ZnCl₂ + H₂
In this reaction, one mole of zinc reacts with two moles of hydrochloric acid to produce one mole of hydrogen gas. This means that the amount of hydrogen gas generated is directly proportional to the amount of zinc used.
If one test tube has twice the amount of zinc compared to the other, the amount of hydrogen gas collected in that test tube would be double because the reaction involves a 1:2 ratio of zinc to hydrogen gas.
It’s important to note that this explanation assumes the context of a specific experimental setup. If your activity involves a different reaction or set of conditions, please provide more details for a more accurate response.
When an iron nail is dipped into a copper sulfate (CuSO₄) solution, a displacement reaction occurs. Iron is more reactive than copper, so it displaces copper ions from the copper sulfate solution. The chemical equation for this reaction is as follows: Fe(s)+CuSO₄(aq) → FeSO₄ (aq) + Cu(s) In words, iRead more
When an iron nail is dipped into a copper sulfate (CuSO₄) solution, a displacement reaction occurs. Iron is more reactive than copper, so it displaces copper ions from the copper sulfate solution. The chemical equation for this reaction is as follows:
Fe(s)+CuSO₄(aq) → FeSO₄ (aq) + Cu(s)
In words, iron reacts with copper sulfate to form ferrous sulfate (FeSO₄) and copper. The copper produced is in solid form and will appear as a reddish-brown coating on the surface of the iron nail.
The change in color of the copper sulfate solution is due to the formation of this solid copper, which is no longer in the form of copper ions in the solution. The initial blue color of copper sulfate solution fades as copper metal is deposited on the iron surface, leading to a color change in the solution.
Farmers may treat soil with quicklime (calcium oxide), slaked lime (calcium hydroxide), or chalk (calcium carbonate) under different soil conditions to address specific issues. The common scenarios where each of these lime-based materials might be used: 1. Quicklime (Calcium Oxide): » Acidic Soil: QRead more
Farmers may treat soil with quicklime (calcium oxide), slaked lime (calcium hydroxide), or chalk (calcium carbonate) under different soil conditions to address specific issues. The common scenarios where each of these lime-based materials might be used:
1. Quicklime (Calcium Oxide):
» Acidic Soil: Quicklime is often applied to acidic soils to raise the soil pH. This process is known as liming. By increasing the pH, quicklime helps neutralize soil acidity and improves the soil’s suitability for plant growth. Additionally, quicklime can enhance soil structure.
2. Slaked Lime (Calcium Hydroxide):
» Acidic Soil: Similar to quicklime, slaked lime is used to raise the pH of acidic soils.
» Treatment of Industrial Wastes: Slaked lime can be used to treat industrial effluents and agricultural runoff, helping to neutralize acidic substances.
Chalk (Calcium Carbonate):
» Mildly Acidic to Neutral Soil: Chalk is often applied to soils that are only slightly acidic or neutral. It can help maintain a stable and favorable pH level for plant growth.
» Calcium and Carbonate Source: Chalk not only adjusts pH but also provides a source of calcium and carbonate ions, which can be beneficial for plant nutrition.
The choice among quicklime, slaked lime, and chalk depends on factors such as the severity of soil acidity, the desired pH level, and the specific agricultural goals. It’s important for farmers to conduct soil tests to determine the current soil conditions and nutrient levels before deciding on the appropriate lime treatment. Additionally, they should follow recommended application rates to avoid over-liming, which can have adverse effects on soil health.
The compound CaOCl₂ is commonly known as "bleaching powder." It is also sometimes referred to as "chlorinated lime." Bleaching powder is a chemical compound often used for bleaching, disinfection, and water treatment. It contains calcium, oxygen, and chlorine.
The compound CaOCl₂ is commonly known as “bleaching powder.” It is also sometimes referred to as “chlorinated lime.” Bleaching powder is a chemical compound often used for bleaching, disinfection, and water treatment. It contains calcium, oxygen, and chlorine.
A solution of a substance ‘X’ is used for whitewashing.
(i) The substance used for whitewashing is calcium oxide, commonly known as quicklime. Its chemical formula is CaO. (ii) The reaction of calcium oxide (quicklime) with water is an exothermic reaction, and it produces calcium hydroxide, commonly known as slaked lime. The balanced chemical equation foRead more
(i) The substance used for whitewashing is calcium oxide, commonly known as quicklime. Its chemical formula is CaO.
See less(ii) The reaction of calcium oxide (quicklime) with water is an exothermic reaction, and it produces calcium hydroxide, commonly known as slaked lime. The balanced chemical equation for this reaction is:
CaO + H₂O → Ca(OH)₂
In words, quicklime reacts with water to form calcium hydroxide.
Why is the amount of gas collected in one of the test tubes in Activity 1.7 double of the amount collected in the other? Name this gas.
To provide a more accurate response, I would need additional details about "Activity 1.7" and the gases involved. However, I can offer a general explanation for why the amount of gas collected in one test tube might be double that of another. If the activity involves the reaction of a metal with anRead more
To provide a more accurate response, I would need additional details about “Activity 1.7” and the gases involved. However, I can offer a general explanation for why the amount of gas collected in one test tube might be double that of another.
If the activity involves the reaction of a metal with an acid, such as zinc with hydrochloric acid, the balanced chemical equation for the reaction is:
Zn + 2HCl → ZnCl₂ + H₂
In this reaction, one mole of zinc reacts with two moles of hydrochloric acid to produce one mole of hydrogen gas. This means that the amount of hydrogen gas generated is directly proportional to the amount of zinc used.
If one test tube has twice the amount of zinc compared to the other, the amount of hydrogen gas collected in that test tube would be double because the reaction involves a 1:2 ratio of zinc to hydrogen gas.
It’s important to note that this explanation assumes the context of a specific experimental setup. If your activity involves a different reaction or set of conditions, please provide more details for a more accurate response.
See lessWhy does the colour of copper sulphate solution change when an iron nail is dipped in it?
When an iron nail is dipped into a copper sulfate (CuSO₄) solution, a displacement reaction occurs. Iron is more reactive than copper, so it displaces copper ions from the copper sulfate solution. The chemical equation for this reaction is as follows: Fe(s)+CuSO₄(aq) → FeSO₄ (aq) + Cu(s) In words, iRead more
When an iron nail is dipped into a copper sulfate (CuSO₄) solution, a displacement reaction occurs. Iron is more reactive than copper, so it displaces copper ions from the copper sulfate solution. The chemical equation for this reaction is as follows:
Fe(s)+CuSO₄(aq) → FeSO₄ (aq) + Cu(s)
In words, iron reacts with copper sulfate to form ferrous sulfate (FeSO₄) and copper. The copper produced is in solid form and will appear as a reddish-brown coating on the surface of the iron nail.
The change in color of the copper sulfate solution is due to the formation of this solid copper, which is no longer in the form of copper ions in the solution. The initial blue color of copper sulfate solution fades as copper metal is deposited on the iron surface, leading to a color change in the solution.
See lessUnder what soil condition do you think a farmer would treat the soil of his fields with quick lime (calcium oxide) or slaked lime (calcium hydroxide) or chalk (calcium carbonate)?
Farmers may treat soil with quicklime (calcium oxide), slaked lime (calcium hydroxide), or chalk (calcium carbonate) under different soil conditions to address specific issues. The common scenarios where each of these lime-based materials might be used: 1. Quicklime (Calcium Oxide): » Acidic Soil: QRead more
Farmers may treat soil with quicklime (calcium oxide), slaked lime (calcium hydroxide), or chalk (calcium carbonate) under different soil conditions to address specific issues. The common scenarios where each of these lime-based materials might be used:
1. Quicklime (Calcium Oxide):
» Acidic Soil: Quicklime is often applied to acidic soils to raise the soil pH. This process is known as liming. By increasing the pH, quicklime helps neutralize soil acidity and improves the soil’s suitability for plant growth. Additionally, quicklime can enhance soil structure.
2. Slaked Lime (Calcium Hydroxide):
» Acidic Soil: Similar to quicklime, slaked lime is used to raise the pH of acidic soils.
» Treatment of Industrial Wastes: Slaked lime can be used to treat industrial effluents and agricultural runoff, helping to neutralize acidic substances.
Chalk (Calcium Carbonate):
» Mildly Acidic to Neutral Soil: Chalk is often applied to soils that are only slightly acidic or neutral. It can help maintain a stable and favorable pH level for plant growth.
» Calcium and Carbonate Source: Chalk not only adjusts pH but also provides a source of calcium and carbonate ions, which can be beneficial for plant nutrition.
The choice among quicklime, slaked lime, and chalk depends on factors such as the severity of soil acidity, the desired pH level, and the specific agricultural goals. It’s important for farmers to conduct soil tests to determine the current soil conditions and nutrient levels before deciding on the appropriate lime treatment. Additionally, they should follow recommended application rates to avoid over-liming, which can have adverse effects on soil health.
See lessWhat is the common name of the compound CaOCl2?
The compound CaOCl₂ is commonly known as "bleaching powder." It is also sometimes referred to as "chlorinated lime." Bleaching powder is a chemical compound often used for bleaching, disinfection, and water treatment. It contains calcium, oxygen, and chlorine.
The compound CaOCl₂ is commonly known as “bleaching powder.” It is also sometimes referred to as “chlorinated lime.” Bleaching powder is a chemical compound often used for bleaching, disinfection, and water treatment. It contains calcium, oxygen, and chlorine.
See less