Principles Of Chemistry Flashcards
(6 cards)
How does metallic bonding form
Sea of Delocalised outer electron (positive metal ions)
Strong electrostatic forces of attractions
High melting and boiling points
Conduct heat and electricity as the delocalised electrons can move and carry charge
Why are metals malleable
Because the layers of atoms are able to slide over each other
What is an alloy and why are they so hard
Mixture of metals
Different atom sizes distort the layers so they are unable to slide over eachother
What is solubility described as
Maximum amount of a substance that will dissolve in a given amount of solvent at a certain temperature
Often increased by temperature
What is the formula for solubility
Mass of solid/mass of water removed X 100
How would you investigate the solubility of ammonium chloride
Pour 200 cm cubed of deionised water into a 250cm cubed beaker
Place the beaker in a water bath set to specific temperature
Add a mass of ammonium chloride and stir until it dissolves
Continue to add until no more dissolves, indicating saturation
Repeat for different temperatures
Record the change in mass
Repeats and mean average
