Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
7 Cards in this Set
- Front
- Back
|
Importance of melting point
|
Helps identify the compound and establish its purity
|
|
|
What do we compare our MP with?
And where can we find it? |
We comepare it with MP of a known compound
I can be found in MSDS (Material safety data sheet) |
|
|
The melting point is
True melting point can only be measured at |
The range of crystals turns to a clear liquid
(From first drop to a clear liquid) At standard conditions (1 ATM) |
|
|
The purer the material,
In general pure compounds have melting point ranges |
1. The higher its melting point
2. The narrower its melting point Less than about 2C |
|
|
Eutectic
|
Minimum temperature reached (of mixture)
After eutectic point adding impurity would increase the melting point Vertical distance between lower and upper curves represents melting range |
|
|
Apparatus
|
|
|
|
Mixture melting points
|
Known + Unknown mixture (50/50)
If melting point decreases, then they are not the same compound |
