No, impurities do not raise the melting point of Stearic Acid, they decrease it.
All impurities decrease the melting point of solids.
No. Impurities do not raise the melting point of Stearic Acid, the lower it.
All impuritues lower the melting point of acids
Any impurity in any material alter the the physical properties, including the melting point.
An experiment is useful.
You can experiement with the melting point, boiling point, and freezing point of the elements to prove they have similar properties. This and you can check the different physical and other chemical properties for similarities and comparison.
That's actually not that difficult. If one wishes to answer this question in depth, feel free, but all one must do is test them separately. Just put glucose and your indicator (most-likley benedict's solution) in separate beakers, and then heat them both. Nothing will happen to either of them.
1. Melting of the candle is a physical change. 2. Burning and thermal decomposition are chemical changes.
62-65 degrees c
Nope. There are some solids that go directly into the gas phase. Such a process is called sublimation. ans2 No. Some solids chemically decompose when heated. You can't get liquid wood. Some solids turn directly into a gas when heated at standard atmospheric pressure. An example of this is dry ice. I believe that some solids, do not ask me but this is a theory that I can't prove, but some solids have such a high melting point that if heated to its melting point the molicules will become so unstable that the solid would accualy blow up before the period of melting can occur. Although have fun trying to find something on earth that can reach that heat output. One example that comes to mind is diamond. I do not believe diamond has ever melted? Correct me if im wrong.
it's -0000 degreee calcius
The prove is the determination of these melting points.
One of the easier and more reliable ways to check if a solid compound is pure after re-crystallization is to check its melting point. Impurities will always lower the melting point of a sample, and the more impure, the lower the melting point will be. By checking the melting point of your sample with a reference value from a book or reliable internet source, it can be determined exactly how impure the sample is. If perhaps your compound is unknown, and thus are unable to obtain a reference value, you could obtain melting point of the sample, and then re-crystallize a few more times, obtaining a new melting point each time, until it is unchanged by re-crystallizing. This will of course decrease your yield, but if there is little fluctuation in your series of melting points, you can be sure you have a relatively pure sample.
You can experiement with the melting point, boiling point, and freezing point of the elements to prove they have similar properties. This and you can check the different physical and other chemical properties for similarities and comparison.
You can prove there is glucose in a sample by using Benedict's Solution. Heat up the sample, and add the Benedict's Solution. Assuming the solution is clear, if glucose is present it will change colour to red, or yellow, or green. If not, it will stay clear.
You can label the test tubes with the names or letters like A,B and C. The difference can be seen from looking at the test tubes. However; there are also tests that can help you differentiate between different substance.
Yes when it is very hot
By measuring another physical property or making a chemical analysis.
A parable.
sure
Changing a chocolate from soild to liquid requires the absroption of energy.
I'm not sure what the "one" takes on in the sentence of if one writes logically, he will prove his point. Is it third person?