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Q: What is the purpose of the cold water when testing a leaf for starch?
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When testing a leaf for starch why is it rinsed in cold water after it is boiled?

After the leaf has been placed in ethanol it becomes very brittle. It is then rinsed in cold water so as to soften it and makes it more manageable for the addition of iodine.


How do you gelatinize starch without applying heat?

Purchase a cold water swelling starch.


What happens when starch dissolves in water?

Starch cannot dissolve in cold water, however boiling water has sufficient enough energy to dissolve starch.


Will cornstarch dissolve in water?

Only in boiling water.


In a direct system of a cold water supply what is the purpose of the cold feed pipe?

If you are referring to a regular building, the cold water feed pipe goes directly to all cold faucets, toilets and hot water tank. The purpose seems obvious.


Where does the phrase put your big toe in it come from?

When you enter really cold water such as a river, lake or ocean, you start by testing how cold the water is, not by plunging into the water.


Why has water been included as one of the test materials for reducing sugars starch and protein?

sugars and starch are both made only of carbon, hydrogen and oxygen that is insoluble in cold water or alcohol


What congeals with water?

most forms of food starch congeal in water, some require hot water first, others will thicken cold water.


Is starch more soluble in hot or cold water?

Hot water, because particles will move faster and spread apart more than in cold water, thus making it more soluble.


In a direct system of cold water supply the purpose of the cold feed pipe to?

If you are referring to a regular building, the cold water feed pipe goes directly to all cold faucets, toilets and hot water tank. The purpose seems obvious.


Granulated corn starch what is it used for?

Corn starch is used for thickening sauces or soups. One adds it to a dish by bringing the liquid to a boil and then mixing equal parts of corn starch and ice cold water. When the starch is dissolved add it to the dish while stirring rapidly. Be careful not to add to much or the dish will get unpleasant lumps.


Starch is dissolved in which solvent?

Cold water. It is only slightly soluble in hot water. It is partially soluble in some organic liquids such as methanol and acetone.-----------------------------------N-methyl morpholine N-oxide (NMMO) is direct solvent for cellulose and other polysaccharides such as starch.