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chemistry
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- Chemistry
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- 12th Grade
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1. Preparation of Silver Acetylide: The first step is to prepare silver acetylide. This is done byreacting silver nitrate with calcium carbide (CaC2) in water. Calcium carbide reacts with water
to produce acetylene gas, which then reacts with silver nitrate to form silver acetylide.
Here's a step-by-step calculation to help illustrate the reaction:
CaC2 + 2H2O → C2H2 + Ca(OH)2
Silver nitrate reacts with the acetylene to form silver acetylide:
2C2H2 + 4AgNO3 → 2Ag2C2 + 2NO2 + 2H2O
Note the use of balancing chemical equations to ensure the correct moles of reactants and products.
1. Formation of Copper Acetylide: Once the silver acetylide is formed, it can be used to form
copper acetylide. This is done by reacting the silver acetylide with copper(I) chloride in water.
Ag2C2 + 2CuCl → 2AgCl + 2CuC2
You can see the reaction taking place in the video, as the copper(I) chloride solution turns dark,
indicating the formation of copper acetylide.
Now, let's add a few anecdotes to make the summary flow like a story.
Did you know that acetylene gas was first identified in 1836 by Edmund Davy? At the time, it was
known as "phosphuretted hydrogen," and it wasn't until 1860 that the correct chemical formula was
determined.
In the early days, acetylene was used for lighting, known as " carbureted water gas." By passing air
and steam over burning coal, a mixture of carbon monoxide and hydrogen was produced. By adding
acetylene, the mixture burned with a bright flame, making it suitable for lighting.
As for the significance of acetylide, it's used in a variety of applications, from polymerization to
medicinal chemistry. For example, it's used to produce the anti-inflammatory drug oxicam.
In terms of hand-drawn plots, here's a simple diagram illustrating the formation of acetylide:
CaC2 + 2H2O → C2H2 + Ca(OH)2
2C2H2 + 4AgNO3 → 2Ag2C2 + 2NO2 + 2H2O
Ag2C2 + 2CuCl → 2AgCl + 2CuC2
Simple, yet effective in visualizing the process.
In terms of markdown, we can use bolded text to emphasize important reactions:
Preparation of Silver Acetylide: React silver nitrate with calcium carbide in water to produce
acetylene gas, which then reacts with silver nitrate to form silver acetylide.
Formation of Copper Acetylide: React silver acetylide with copper(I) chloride in water to
form copper acetylide, as indicated by the darkened solution.
Comprehensive Quiz on Preparation of Silver and Copper Acetylide
Multiple Choice Questions:
1. What is the first step in preparing silver acetylide?
, o a) Reacting silver nitrate with water
o b) Reacting silver nitrate with calcium carbide in water
o c) Reacting silver nitrate with copper chloride
o d) Reacting calcium carbide with silver chloride
2. What gas is produced when calcium carbide reacts with water?
o a) Carbon dioxide
o b) Acetylene
o c) Methane
o d) Oxygen
3. What is the balanced chemical equation for the reaction of calcium carbide with water?
o a) CaC2 + H2O → Ca(OH)2 + CH4
o b) CaC2 + 2H2O → C2H2 + Ca(OH)2
o c) CaC2 + 2H2O → C2H4 + CaO
o d) CaC2 + 2H2O → CaCO3 + H2
4. Which compound is formed when acetylene reacts with silver nitrate?
o a) Silver chloride
o b) Silver nitrate
o c) Silver acetylide
o d) Silver oxide
5. What is the balanced chemical equation for the formation of silver acetylide from acetylene
and silver nitrate?
o a) 2C2H2 + 4AgNO3 → 2Ag2C2 + 2NO2 + 2H2O
o b) C2H2 + 2AgNO3 → Ag2C2 + NO2 + H2O
o c) 2C2H2 + 2AgNO3 → Ag2C2 + 2NO2 + H2O
o d) C2H2 + 4AgNO3 → 2Ag2C2 + 4NO2 + 4H2O
6. Which compound is used to form copper acetylide from silver acetylide?
o a) Copper(II) chloride
o b) Copper(I) chloride
o c) Copper oxide
o d) Copper nitrate
7. What is the balanced chemical equation for the formation of copper acetylide from silver
acetylide?
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