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What else can I help you with?
How do you get iodine from a solution of iodine in ethanol?
As we know PPM=mg/Kg, if d=1 so PPM=mg/L At first we must calculate the densty of ethanol in kg, so when we use 0.5L of ethanol it means : 0.789 kg/L = x kg/0.5L : x=0.394 Kg For a 100 ppm solution of iodine in 0.5 L of ethanol we have 100=mg I2 /0.394 kg so mg I2 = 39 mg S.Pourmand M.Sc. Organic chemistry
What is shiny black solid but gives off a purple vapor when heated.?
You think to iodine.
Why the leaf could not simply be dipped in iodine?
The leaf could not be simply dipped in iodine because it has a waxy cuticle layer that repels water, making it difficult for the iodine to penetrate through and properly stain the leaf for a starch test. To allow the iodine to effectively interact with the leaf and detect starch, the leaf needs to be boiled in alcohol to remove the waxy cuticle first.
Why is ethanol soluble in ether?
Iodine crystals are not soluble in water. This is because Iodine crystals are non-polar. Water is a polar molecule and it therefore cannot attract an one of the iodine atoms since they have an electronegativity of zero.
How do you separate carbon iodine and copper sulphate?
Copper sulfate (white) or -sulfate-pentahydrate (blue) will dissolve in water, so C and I2 can be filtered off. Concentrate the blue solution by boiling off the water (evaporate) and cool down and crystallise (blue crystals of CuSO4(H2O)5 ). Iodine can be dissolved in ethanol 96% (tincturated) and Carbon is then filtered off. Evaporate ethanol at lowered pressure, but some I2 will also evaporate (purple vapor). The filtered C (carbon black) can be dryed off the filter paper, it is not soluble.
What test can we do to determine if starch is produced by the green plants?
To determine if starch is produced by green plants, you can perform an iodine test. First, take a leaf from the plant and boil it in water to kill the cells, then immerse it in alcohol (such as ethanol) to remove chlorophyll. After rinsing the leaf in warm water, add a few drops of iodine solution; a blue-black color change indicates the presence of starch, confirming that the plant has produced it through photosynthesis.
Which reagent would you use to determine the distribution of the carbohydrate stored in leaves?
You need to use iodine to see where the carbohydrates are stored. To make them visible, you must first boil the leaf in water, then boil it in ethanol or methanol.
Why does the concentration of iodine ions remains constant in the iodine clock reaction?
Iodine ion is not consumed; in the first step the iodine ion is oxidized to iodine, in the second step iodine is reduced to iodine ion.
How do you get a starch in a leaf conclusion?
To test for starch in a leaf, first, ensure the leaf has been destarched by placing it in darkness for 24 hours. Then, boil the leaf in water to kill it, followed by soaking it in alcohol (usually ethanol) to remove chlorophyll. After rinsing the leaf in warm water, immerse it in iodine solution. A blue-black color indicates the presence of starch, confirming that photosynthesis has occurred.
Can you freeze a boiled ham joint without slicing it first?
Yes, it is safe to freeze a boiled ham joint without slicing it first.
Has the expired iodine in your first aid kit been properly disposed of?
It is important to properly dispose of expired iodine from your first aid kit.
If a water ethanol mixture is distilled which will be collected first?
Ethanol will vaporize at a lower temperature than water, so it will be collected first during the distillation process. Ethanol has a lower boiling point (78.37°C) compared to water (100°C), allowing it to evaporate and be collected before water.
