Sturdy and Melting Point
Solubility, Crystallization, and Melting Point Determination Pre-Lab Questions
(2pts) Indicate the correct waste container for the following substances:
a. hexane - non-halogenated organic
b. 10% NaOH - aqueous
c. methylene chloride (dichloromethane) - halogenated organic
deb. magnesium sulfate - sound
e. sodium hypochlorite - halogenated organic
2 . (1pt) Describe the optimal way to separate earth glass joints if they may become stuck.
The proper way to separate ground cup joints is always to hold the two pieces of glasses with paper towels so that your hands are touching as close to the joint as possible and move with a company grip. Make an effort to loosen with a slight turning motion. In the event that that does not work try to faucet with a wood handle and try to pull separate. Lastly you may heat the joint with hot water or steam bath, but to be careful not to over heat.
three or more. (1pt) What exactly solute? Just what solvent?
A solute is the sturdy that is dissolved in a water. The solvent is the water in which something is dissolved.
4. (1pt) Precisely what is the purpose of a water snare (used during vacuum filtration)?
The purpose of a water pitfall is to stop filtrate coming from being sucked into the vacuum pressure system.
five. (2pts) What is the difference between crystallization and precipitation of any product? List three distinctions.
Crystallization forms crystalline solids although precipitation produces amorphous solids. Crystallization is slow and a pure compound comes out of solution and precipitation is usually fast and a mixture of substances falls out of answer. Crystals offer an ordered framework than amorphous solids and are harder to generate.
6. (1pt) What will happen if you choose a solvent whose cooking food point is definitely higher than the melting stage of the substance to be crystallized?
The solvent would boil away before the substance could burn.
7. (1pt) How exactly does the melting point of the product support determine its purity?
The purer the material the greater its...