A level chemistry paper 2
Silver nitrate+ nitric acid + chloride ions - Ans>>White precipitate
Silver nitrate+ nitric acid + bromide ions - Ans>>Cream precipitate
Silver nitrate+ nitric acid + iodide ions - Ans>>Yellow precipitate
Substances that decolorise bromine water - Ans>>Alkenes
Electrophiles - Ans>>Electron pair acceptors, attracted to electrons e.g H+
NaF and NaCl - Ans>>Produces misty fumes with conc sulphuric acid
NaBr - Ans>>Produces misty and orange/brown fumes with conc sulphuric acid
NaI - Ans>>Produces misty fumes, purple vapour, bad egg smell with conc
sulphuric acid
Le chateliers principle - Ans>>If a factor affecting the equilibrium is changed the
equilibrium will shift to oppose this change
Enthalpy change - Ans>>The overall temperature change at a constant pressure of
a reaction
Hess's law - Ans>>The overall enthalpy change of a reaction at a constant pressure
is independent to the route taken
Why does E-Z isomerism occur - Ans>>Due to the restriction of the double carbon
bond
Positional isomers - Ans>>The functional group is attached to a different carbon
Functional group isomers - Ans>>Same atoms arranged into different functional
groups e.g cyclohexane and hexene
Dative covalent bond - Ans>>A bond of shared electrons where both electrons are
supplied from one of the atoms
Kelvin - Ans>>Temperature in degrees Celsius + 273
Metres cubed - Ans>>The unit of volume in ideal gas equation
Number of particles= - Ans>>Number of moles x avogadros constant
Linear - Ans>>2 bonding pairs, 0 lone pairs, 180 bond angle
Trigonal planar - Ans>>3 bonding pairs, 0 lone pairs, 120 bond angle
Tetrahedral - Ans>>4 bonding pairs, 0 lone pairs, 109.5 bond angle
Trigonal bipyramidal - Ans>>5 bonding pairs, 0 lone pairs, 90 and 120 bond angle
Silver nitrate+ nitric acid + chloride ions - Ans>>White precipitate
Silver nitrate+ nitric acid + bromide ions - Ans>>Cream precipitate
Silver nitrate+ nitric acid + iodide ions - Ans>>Yellow precipitate
Substances that decolorise bromine water - Ans>>Alkenes
Electrophiles - Ans>>Electron pair acceptors, attracted to electrons e.g H+
NaF and NaCl - Ans>>Produces misty fumes with conc sulphuric acid
NaBr - Ans>>Produces misty and orange/brown fumes with conc sulphuric acid
NaI - Ans>>Produces misty fumes, purple vapour, bad egg smell with conc
sulphuric acid
Le chateliers principle - Ans>>If a factor affecting the equilibrium is changed the
equilibrium will shift to oppose this change
Enthalpy change - Ans>>The overall temperature change at a constant pressure of
a reaction
Hess's law - Ans>>The overall enthalpy change of a reaction at a constant pressure
is independent to the route taken
Why does E-Z isomerism occur - Ans>>Due to the restriction of the double carbon
bond
Positional isomers - Ans>>The functional group is attached to a different carbon
Functional group isomers - Ans>>Same atoms arranged into different functional
groups e.g cyclohexane and hexene
Dative covalent bond - Ans>>A bond of shared electrons where both electrons are
supplied from one of the atoms
Kelvin - Ans>>Temperature in degrees Celsius + 273
Metres cubed - Ans>>The unit of volume in ideal gas equation
Number of particles= - Ans>>Number of moles x avogadros constant
Linear - Ans>>2 bonding pairs, 0 lone pairs, 180 bond angle
Trigonal planar - Ans>>3 bonding pairs, 0 lone pairs, 120 bond angle
Tetrahedral - Ans>>4 bonding pairs, 0 lone pairs, 109.5 bond angle
Trigonal bipyramidal - Ans>>5 bonding pairs, 0 lone pairs, 90 and 120 bond angle
