Module 1-4 extras Flashcards
Combustion of this polymer produces HCl, which is a toxic gas.
Describe how HCl is removed from the waste gases produced.
HCl gas is passed through alkali/carbonate
Suggest what the student should do next to reduce the effect of any random error in the titration.
Repeat titration until (two) titrations are concordant / agree within 0.1 cm3
Calculate mean titre from concordant titres
Describe how a σ-bond forms.
Overlap of orbitals directly between the bonding atoms
What does a curly arrow represent in a reaction mechanism?
Movement of a pair of electrons
Write an equation for the first ionisation energy of chlorine.
Cl(g) → Cl+(g) + e–
suggest the formula of the electrophile formed from IBr.
I+
Increasing pressure effect rate of reaction
(Increase in pressure) increases the rate
AND because molecules are closer together…
… so there are more collisions per unit time
atomic (proton) number
The number of protons in the nucleus of an atom.
bond dissociation enthalpy
The enthalpy change that takes place when breaking by homolytic
fission 1 mol of a given bond in the molecules of a gaseous species.
bonded pair
A pair of electrons shared between two atoms to make a covalent bond
displacement reaction
A reaction in which a more reactive element displaces a less reactive
element from an aqueous solution of its ions.
oxidation state
The oxidation number.
partial dissociation
The splitting of some of a species in solution into aqueous ions.
Pauling electronegativity value
A value assigned as a measure of the relative attraction of a
bonded atom for the pair of electrons in a covalent bond.
percentage yield % yield
actual amount ,in mol, of product/theoretical amount ,in mol, of product x 100
