Question

Назовите три физических свойства, по которым можно отличить сахар и крахмал!

Answer 1

Ответ:

сахар кристаллический,сладкий, растворяется в воде полностью а крахмал сыпучий, не имеет выраженных кристаллов, при растворении в воде имеет белый цвет и осадок.

Answer 2

Three Physical Properties to Distinguish Between Sugar and Starch

When it comes to distinguishing between sugar and starch, there are several physical properties that can be considered. Here are three key properties that can help differentiate between the two:

1. Solubility: Sugar is highly soluble in water, while starch is not. When sugar is added to water, it dissolves readily, forming a clear solution. On the other hand, starch does not dissolve easily in water and tends to form a suspension or a cloudy mixture.

2. Taste: Sugar has a sweet taste, while starch is tasteless. This difference in taste can be used as a simple way to distinguish between the two substances. By tasting a small amount, one can determine if the substance is sweet (indicating sugar) or tasteless (indicating starch).

3. Iodine Test: Another way to differentiate between sugar and starch is by performing an iodine test. Iodine reacts with starch to produce a blue-black color, while it does not react with sugar. By adding a few drops of iodine solution to a sample, one can observe the color change. If the sample turns blue-black, it indicates the presence of starch, whereas if there is no color change, it suggests the absence of starch and the presence of sugar.

Please note that these three properties are commonly used to distinguish between sugar and starch, but there may be other methods available as well. It is always recommended to consult reliable sources or conduct further experiments for accurate identification.

I hope this helps! Let me know if you have any more questions.