C2 - A Flashcards
How do you work out percentage yield?
Actual yield/percentage yield x100
How do you work out % mass of an element in a compound?
(Atomic mass of element X number of atoms of element)
/formula mass of compound
X100
What is the mole of a substance?
The relative formula mass in grams
1 mole = the relative formula mass of compound
How do you work out the number of mole of a substance?
Mass of substance/mass of 1 mole of substance
What is a nano particle?
A tiny manufactured structure of a few hundred atoms
What are the forces and bonding in an ionic compound?
Positive metal ions and negative non metal ions
Regular lattice structure
Strong electrostatic forces of attraction
What are the properties of ionic compounds?
High melting and boiling points
Solid doesn’t conduct electricity
Liquid does conduct electricity - free electrons
In ionic bonding, do metals lose or gain electrons?
Lose and become positive
In ionic bonding, do non-metals lose or gain electrons?
Gain and become negative
What are the forces and structure of giant covalent structures?
Strong covalent bonds
3D lattice
What are the properties of giant covalent structures?
High melting points
Many are very hard
Don’t conduct electricity
Don’t dissolve in water
