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Why phenol is stored in brown colour bottle?
Oh, dude, phenol is stored in brown bottles because it's like a diva who can't stand the spotlight! The brown color helps block out light and prevents phenol from getting all dramatic and decomposing when exposed to sunlight. It's like giving phenol a pair of sunglasses to keep it cool and stable.
What happens when excess hydroxide solution is added to copper II sulphate solution?
When excess hydroxide solution is added to copper II sulphate solution, a precipitate of copper II hydroxide forms. The balanced chemical equation for this reaction is CuSO4 + 2NaOH -> Cu(OH)2 + Na2SO4. In this reaction, the blue color of the copper II sulfate solution turns into a light blue precipitate of copper II hydroxide.
WHY DOES PHENOLPHTHALENE TURNS COLORLESS WHEN ADDED BY SULFURIC ACID?
When phenolphthalein is added to sulfuric acid, the sulfuric acid causes the phenolphthalein molecule to lose its specific color due to a chemical reaction that alters its molecular structure. This reaction likely involves protonation of the phenolphthalein molecule, leading to a change in its absorption of light and resulting in a colorless solution.
What observations are seen between zinc and copper sulphate reaction?
When zinc is added to copper sulfate solution, a redox reaction occurs where zinc displaces copper, which is less reactive, from the solution. The zinc metal appears to dissolve as it forms zinc sulfate, while copper metal deposits on the surface of the zinc. This results in a color change from blue to colorless in the solution and a coppery appearance on the surface of the zinc.
Why feric chloride give violet colour with phenol?
Ferric chloride reacts with phenol to form a complex that absorbs light in the violet region of the spectrum. The violet color is due to this complex forming between the ferric ions and the phenol molecules, resulting in the absorption of light at specific wavelengths that appear as violet to the human eye.
Why phenol is stored in brown colour bottle?
Oh, dude, phenol is stored in brown bottles because it's like a diva who can't stand the spotlight! The brown color helps block out light and prevents phenol from getting all dramatic and decomposing when exposed to sunlight. It's like giving phenol a pair of sunglasses to keep it cool and stable.
What happens when excess hydroxide solution is added to copper II sulphate solution?
When excess hydroxide solution is added to copper II sulphate solution, a precipitate of copper II hydroxide forms. The balanced chemical equation for this reaction is CuSO4 + 2NaOH -> Cu(OH)2 + Na2SO4. In this reaction, the blue color of the copper II sulfate solution turns into a light blue precipitate of copper II hydroxide.
WHY DOES PHENOLPHTHALENE TURNS COLORLESS WHEN ADDED BY SULFURIC ACID?
When phenolphthalein is added to sulfuric acid, the sulfuric acid causes the phenolphthalein molecule to lose its specific color due to a chemical reaction that alters its molecular structure. This reaction likely involves protonation of the phenolphthalein molecule, leading to a change in its absorption of light and resulting in a colorless solution.
When iron fillings are added to copper II sulphate solution a reaction takes place write a chemical equation for this reaction?
The reaction takes place resulting in the formation of Iron sulphate(light green coloured) and copper(solid). The equation is :- Fe(s) + CuSO4(aq.) ------------> FeSO4(aq.) + Cu(s)
What observations are seen between zinc and copper sulphate reaction?
When zinc is added to copper sulfate solution, a redox reaction occurs where zinc displaces copper, which is less reactive, from the solution. The zinc metal appears to dissolve as it forms zinc sulfate, while copper metal deposits on the surface of the zinc. This results in a color change from blue to colorless in the solution and a coppery appearance on the surface of the zinc.
Why colour of copper sulphate solution changes to light green when iron filings are added?
The color change occurs because the iron filings react with copper sulfate, forming iron sulfate and copper. This reaction results in a displacement reaction, where the iron displaces the copper in the compound. This changes the chemical composition of the solution, resulting in a light green color.
What will happen when you add strong iodine solution to chloroform?
When strong iodine solution is added to chloroform, no immediate reaction will occur. However, if the mixture is exposed to light, chloroform may undergo photochemical decomposition to produce hydrogen chloride gas and elemental iodine. This reaction is not commonly used and caution should be taken due to the toxic nature of the resulting products.
Why feric chloride give violet colour with phenol?
Ferric chloride reacts with phenol to form a complex that absorbs light in the violet region of the spectrum. The violet color is due to this complex forming between the ferric ions and the phenol molecules, resulting in the absorption of light at specific wavelengths that appear as violet to the human eye.
Is a glow stick a gas-liquid solution?
No, a glow stick is not a gas-liquid solution. It is a chemical reaction that occurs between two different substances contained within the stick when they are mixed together, resulting in the production of light.
What happens when ammonia solution is added to copper sulphate?
A precipitate is formed which has a light blue colour. After shaking, the precipitate re-dissolves forming a dark blue solution.
What are the products and reactants of glow sticks?
In a glow stick, the products formed are chemical compounds that emit light due to a chemical reaction called chemiluminescence. Typically, this reaction involves a hydrogen peroxide solution and a dye molecule, resulting in the emission of light. The reactants are the chemicals present in the glow stick that undergo the reaction to produce light.
How do glow sticks light up?
Glow sticks emit light through a chemical reaction called chemiluminescence. Inside a glow stick, a chemical solution is kept separate from a substance called a dye. When the stick is bent and the inner capsule is broken, the two substances mix, causing a chemical reaction that produces light.
