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If a substance is a compound, you know exactly what is in it. Scientists say that compounds have a fixed composition. that means that they are always made up from the same atoms, present in the same ratio.
Wiki User
∙ 13y ago
Wiki User
∙ 11y agoIn science we like to describe properties at STP, standard temperature and pressure, 32 degrees Fahrenheit (degF)
and 14.5 PSI (freezing point of water and sea level).
Another consideration is the term "mixture" which must be understood as chemically homogeneous. Potassium chromate
- CrK2O4 (melting point 1774 degF)
is a single chemical mixture as opposed to a mixture of say iron filings and sodium chloride FE+NaCl
(table salt) in which both separate elements will melt at different temperatures (assuming the heat does not cause a reaction).
At STP, in general, homogeneous mixtures have fixed melting points. So ice melts at 32 degF
and sulfur melts at 239 degF.
Wiki User
∙ 13y agoA mixture is two or more substances that are NOT chemically combined, therefore making it not have a constant boiling point or melting point.
Wiki User
∙ 16y agoNO
Wiki User
∙ 7y agoYes, it is true.
shann the clasher
:D
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How is the melting of an impure compound expected to change with recrystallization?
The melting point of an impure compound will become closer to that of the actual melting point of the pure substance with recrystallization of your mixture.
How you know specific compound from another by melting point?
Melting point is a unique characteristic of a substance.
What is the melting point of compound Benzoin?
137
What effect would too rapid heating have upon apparent melting point of a compound?
The melting point of the compound would be lower than it actually is.
Is the melting point of organic compound high or low?
Melting point is important in organic chemistry because it can be used for the identification of a compound. For pure solid organic compounds will have a small melting point range (0.5-10C),thus presence of impurity can also be find out by Melting point.
Do elements compounds and mixtures have fix melting and boiling point?
Yes, elements have fixed melting points; but some exceptions are with the elements having allotropes (as carbon, sulfur, phosphorous, etc.) - each allotrope has a specific melting point.
Do compounds have fixed temperature?
No. If you think about melting or boiling point, these values are specific and constant for each compound (with some exceptions).
Is an alloy of aluminum has a melting range instead of a melting point is the alloy a compound?
It is a compound. All pure elements have a certain exact melting point.
What are the applications of finding the melting point of an organic compound?
To check the purity of the organic compound.
How is the melting of an impure compound expected to change with recrystallization?
The melting point of an impure compound will become closer to that of the actual melting point of the pure substance with recrystallization of your mixture.
What is lower fixed point?
upper fixed point is a temperature of stem from water boiling and standards atmospheric pressure lower fixed point is the temperature of pure melting ice.
What is the melting point of the ionic compound RaCl2?
The melting point of radium chloride is 900 0C.
How you know specific compound from another by melting point?
Melting point is a unique characteristic of a substance.
What is the melting point of compound Benzoin?
137
What effect would too rapid heating have upon apparent melting point of a compound?
The melting point of the compound would be lower than it actually is.
Why are the temperatures of the melting point of ice boiling point of water called fixed point in calibrating the thermometer?
it is because they were consistent at melting and boiling point
Is the melting point of organic compound high or low?
Melting point is important in organic chemistry because it can be used for the identification of a compound. For pure solid organic compounds will have a small melting point range (0.5-10C),thus presence of impurity can also be find out by Melting point.
