gaps Flashcards
what is amount of substance
Amount of substance - contains same number of elementary particles as there are carbon atoms in 12 grams of carbon-12
what is mole
unit for amount of substance
what is avragados constant
no of particles per mol
what is molar gas volume
volume occupied by one mole of any gas, at room temperature and pressure
what is water of crystallisation
water that is chemically bonded into a crystal structure
what is anhydrous
contains no water of crystallisation
what is hydrous
chemical compounds that are composed of water molecules in their structure
how do you convert from mol/dm3 to g/dm3
multiply by RAM
How do you make a standard solution
- weigh a mass of known concentration solid
- place in a beaker
- dissolve with distil water
- rewash weiging boat
- transfer to a volumetric flask
- fill up with water to 250 cm^3
- shake
What is no of electrons that can fill the first 4 shells
2,8,16,32
Types of compounds forming ions
soluble ionic
strong acid / bases
what doesnt form ions
carbonates , precipitates
covalent compound
