OBHB - Module 2.1 Flashcards
Define ‘relative isotopic mass’.
The mass of an isotope relative to 1/12th of an atom of carbon-12.
Define ‘relative atomic mass’.
The weighted mean mass of atoms of an element relative to 1/12th of the mass of an atom of carbon-12.
What is Avogadro’s constant?
6.02×10^23
What is the R in PV=nRT?
8.314 J/mol
What is the water of crystallisation?
The water incorporated into the lattice structure of some salts.
What is another name for an acid?
A proton donor.
What is it called when an acid releases hydrogen atoms?
Dissociation.
What is another name for a base?
A proton acceptor.
What is an alkali?
A soluble base.
What happens to form a salt?
A metal or ammonium ion replaces one or more of the hydrogen ions in an acid.
Define atom economy.
The sum of the molecular masses of the desired product divided by the sum of the molecular masses of all products, multiplied by 100.
How do you calculate percentage yield?
Actual yield divided by theoretical yield, multiplied by 100.
Define an ionic bond.
The electrostatic forces of attraction formed between oppositely charged ions.
