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In 1840 it was discovered that bromine(7726-95-6) had some advantages over the previously used iodine vapor to create the light sensitive silver halide layer used for daguerreotypy.
Potassium bromide and sodium bromide were used as anticonvulsants and sedatives in the late 19th and early 20th centuries, until they were gradually superseded by chloral hydrate and then the barbiturates.
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What colour does bromine water change when you mix it with saturated fat?
Bromine water will change from orange to colourless when it is mixed with saturated fat.
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.
Does ethene change from orange to colourless when it reacts with bromine water?
Yes, ethene reacts with bromine water to form a colourless solution. In the presence of ethene, the orange-brown color of bromine water disappears as bromine is consumed in the addition reaction with ethene to form a colourless compound.
Does a physical or chemical change occur when aluminum foil is placed into liquid bromine and a white solid forms?
A chemical change occurs. When aluminum foil is placed in liquid bromine, the aluminum reacts with bromine to form aluminum bromide, which appears as a white solid. This reaction is a chemical change because the composition of the substances involved is altered.
What is the color change between aqueous bromine and sodium chloride?
There will be no colour change between the two, as chlorine is more electronegative than bromine and will maintain its negative charge, meaning that the bromine will not react and the orange colour persists.
What colour does bromine water change when you mix it with saturated fat?
Bromine water will change from orange to colourless when it is mixed with saturated fat.
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.
Does ethene change from orange to colourless when it reacts with bromine water?
Yes, ethene reacts with bromine water to form a colourless solution. In the presence of ethene, the orange-brown color of bromine water disappears as bromine is consumed in the addition reaction with ethene to form a colourless compound.
Does a physical or chemical change occur when aluminum foil is placed into liquid bromine and a white solid forms?
A chemical change occurs. When aluminum foil is placed in liquid bromine, the aluminum reacts with bromine to form aluminum bromide, which appears as a white solid. This reaction is a chemical change because the composition of the substances involved is altered.
What is the color change between aqueous bromine and sodium chloride?
There will be no colour change between the two, as chlorine is more electronegative than bromine and will maintain its negative charge, meaning that the bromine will not react and the orange colour persists.
What happens when bromine water is added to paraffin?
When bromine water is added to paraffin, no visible reaction occurs. Paraffin is a non-reactive hydrocarbon compound, so it does not undergo a chemical reaction with bromine. The bromine remains as a colored solution with no change in the paraffin.
What colour change occurs when propene is added in bromine water?
Bromine water is originally orange-brown in color. When propene is added to bromine water, the orange-brown color fades as the bromine molecules react with the carbon-carbon double bond in propene. This reaction leads to the decolorization of the bromine water to a colorless solution.
What happens When is bromine is added to cyclohexane?
When bromine is added to cyclohexane, bromination of the cyclohexane molecule may occur. This involves the substitution of a hydrogen atom in the cyclohexane ring with a bromine atom. This reaction can result in the formation of a new compound with bromine substituents on the cyclohexane ring.
Is there bromine water discoloration at reaction with aqueous solution?
Bromine water will change color in the presence of certain organic compounds, such as alkenes or phenols. When bromine water is added to an aqueous solution containing these compounds, the bromine will react with the double bonds in the alkenes or the aromatic rings in phenols, resulting in a color change from orange to colorless.
When alkenes react with bromine water what colour do they change to?
They turn from orange to colorless.
What evidence is there that bromine undregoes photodissociation?
Bromine undergoes photodissociation in the presence of light, typically in the ultraviolet range. This process can be observed by the change in color of the bromine solution from reddish-brown to colorless due to the formation of bromine radicals. Additionally, spectroscopic studies show characteristic absorption spectra associated with the photodissociation of bromine molecules.
Simple distinguished test between saturated and unsaturated compounds?
One simple test to distinguish between saturated and unsaturated compounds is the bromine water test. Saturated compounds do not react with bromine water (no color change), whereas unsaturated compounds will decolorize the bromine water due to addition of bromine across the double bond in the unsaturated compound.
