Answer:
1) Dissolve the crude substance in a minimum amount of hot solvent.
2) Filter the hot solution to remove the solid impurities (if present)
3) Allow the solution to cool slowly so crystals form.
4) Filter the crystals.
5) Dry the crystals
6) Weigh the crystals into a tared flask.
Explanation:
Recrystallization is a method used in chemistry to obtain crystals having a high degree of purity for the purpose of analytical or synthetic laboratory work.
Row or periods have in common is the valence electron count. The valence electron count goes up as you move across the periodic table. Also atomic size gets smaller as you move from left to right
Significant figures are numbers that are not 0s, but they are included if they are between two numbers:
There are three significant figures, 304
Hope this helps! :)
Phyisical equlibiria deal with the equillibirium phenomena that does not involve any chemical change these are actually chemical changes or solubility this will look at both changes of pure substances as well as mixtures
There's the electrons that surround the nucleus in shells. Electrons have a negative charge and way almost nothing.
In the nucleus, theres protons and neutrons. Neutrons have no charge while protons have a positve charge.
All atom have no charge unless they are ions where theres either more electrons than protons or vice versa.
Negative ions are attracted to positive ions e vice versa