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Why the water sample remains colorless or change to pink upon addition of phenolpthalein indiactor in total alkanilty expt?
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∙ 11y ago
In a total alkalinity experiment, the water sample may remain colorless or change to pink upon the addition of phenolphthalein indicator based on the pH of the water sample. If the water sample is acidic (pH below 8.3), phenolphthalein will remain colorless. If the water sample is basic (pH above 8.3), phenolphthalein will turn pink due to the presence of hydroxide ions, indicating the total alkalinity of the water.
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What is the molecular formula for MTBE?
Methyl tert-butyl ether, also known as methyl tertiary butyl ether and MTBE. In addition, MTBE is a volatile, flammable, and colorless liquid that is sparingly soluble in water.
What kind of reaction occurs when alkenes decolourises bromine in tetra chloromethane?
The reaction is an addition reaction, where the bromine molecule adds across the double bond of the alkene, forming a colorless dibromoalkane product. This causes the bromine solution to lose its characteristic orange color, resulting in decolorization.
Nitrogen dioxide colorless gas that forms when fuels do not burn completely?
Nitrogen dioxide is produced when nitrogen oxides react with oxygen in the air during incomplete combustion of fuels, such as in vehicles or industrial processes. It is a toxic gas that can cause respiratory issues and contribute to air pollution and acid rain. Nitrogen dioxide is a reddish-brown gas with a pungent odor at high concentrations.
How bromine water can be used to test for an alkene?
Bromine water can be used to test for an alkene by adding it to the alkene. The alkene will decolorize the orange-brown bromine water, turning it colorless, due to the addition of bromine across the carbon-carbon double bond in the alkene molecule. This reaction tests for the presence of unsaturation in the compound.
What does bromine water test for?
Bromine water is commonly used to test for the presence of unsaturation in organic compounds. It reacts with alkenes and alkynes to decolorize the bromine water solution, turning it from orange to colorless. This is due to the addition reaction that occurs with the double or triple bond in the unsaturated compound.
What is the colour of phenolphthalein after addition of dilute HCl?
The color of phenolphthalein after the addition of dilute HCl is colorless. Phenolphthalein is typically pink in basic solutions but turns colorless in acidic conditions due to the change in pH.
What is the color of aqueous bromine after addition of the hydrocarbon?
The aqueous bromine will change from orange to colorless after addition of a hydrocarbon due to the formation of an organic bromide compound.
What happens when bromine water is shook up with propane?
The bromine water will turn from its original orange color to colorless if shaken up with propane. This is because bromine water reacts with the alkene compound in propane, forming a colorless compound due to the addition reaction.
What is the molecular formula for MTBE?
Methyl tert-butyl ether, also known as methyl tertiary butyl ether and MTBE. In addition, MTBE is a volatile, flammable, and colorless liquid that is sparingly soluble in water.
Does cyclohexen reacte with bromine?
Yes, cyclohexene can react with bromine to form a dibromocyclohexane product through electrophilic addition. Bromine adds across the double bond of cyclohexene to form a colorless dibromocyclohexane product.
What is a positive test for an alkene?
A positive test for an alkene is the addition of bromine water, which will turn from orange/red to colorless when it reacts with the alkene due to halogenation of the double bond. This test is used to confirm the presence of alkenes.
Does heptene decolourize bromine water in the dark?
Yes, heptene will decolorize bromine water in the dark due to its ability to undergo addition reactions with bromine. This reaction forms a colorless compound, resulting in the decolorization of the bromine water.
What happens when bromine water is shook up with propene?
When bromine water is shaken up with propene, the bromine water will decolorize due to the addition reaction between bromine and propene. This reaction results in the formation of a colorless 1,2-dibromoethane product.
What color does bromine water change when you mix it with unsaturated fat?
Bromine water changes from orange to colorless when mixed with unsaturated fats due to the addition reaction that occurs between bromine and the double bonds in the unsaturated fats.
What is the formula of Blue sapphire a gem stone?
AL2O3 + Fe and/or Ti The basic material of sapphire is known as corundrum - a colorless material formed from aluminum oxide. It is the addition of Titanium and Iron during the formation of the sapphire crystals that produces the beautiful blue of this corundrum variety.
What happens when bromine water reacts with alkenes?
Bromine water reacts with alkenes through an electrophilic addition reaction where the pi bond of the alkene breaks, and bromine atoms are added to the carbon atoms. This reaction results in the decolorization of the bromine water, changing it from orange to colorless.
What salt do you get by mixing nitric acid and potassium hydroxide?
The reaction between nitric acid and potassium hydroxide will yield potassium nitrate (KNO3) in addition to water. Potassium nitrate is a colorless, crystalline salt that is commonly used in fertilizers, food preservation, and fireworks.
