Edexcel IGCSE Chemistry - Paper 1
Potassium manganate (VII) and water (purple colour spreads), ammonia and hydrogen chloride (white
ring forms closer to hydrogen chloride), bromine gas and air (brown bromine gas diffuses) - ANS3
experiments to show diffusion
4OH- = O2 + 2H2O + 4E- - ANSHalf equation for hydroxide ions
Moves slowly (on the surface), fizzes, eventually disappears - ANSLithium with water - observations
Moves quickly (on the surface), fizzes rapidly, may ignite - ANSSodium with water - observations
Reacts vigorously, burns with a lilac flame, sometimes explodes - ANSPotassium with water -
observations
Heat copper (in a tube and pass air over it) - ANSExperiment to test the proportion of oxygen in air
Pale blue - ANSSulfur flame colour
Orange/yellow - ANSCarbon flame colour
Downward delivery (it is denser than air) - ANSHow to collect chlorine
2H2O + CaCO3 = CaCl2 + H2O + CO2 - ANSHow to make CO2 in a lab (equation)
It is soluble in water - ANSWhy can CO2 be used in fizzy drinks?
Platinum wire, dip in hydrochloric acid, hold in flame - ANSFlame test wire to use + how to sterilise it
So the gas can dissolve and make the colour change - ANSWhy does litmus paper need to be damp when
testing a gas?
, Hydrochloric acid - ANSAcid added to remove any impurities for the sulphate test
Nitric acid - ANSAcid added to remove any impurities for the halide test
Bleaches damp litmus paper white - ANSTest for chlorine
A group of organic compounds that can all be represented by the same general formula -
ANSHomologous series
Similar chemical properties, a trend in physical properties (boiling points, colour, viscosity) -
ANSMembers of the same homologous series have...
A group of atoms which are arranged or bonded in a particular way and which determine how an organic
compound will react - ANSFunctional group
Carbon to hydrogen bond - ANSAlkane functional group
Carbon double bond - ANSAlkene functional group
Hydroxide bond - ANSAlcohol functional group
Carbon - ANSAn organic compound is one that contains
CnH2n+2 - ANSAlkane general formula
CnH2n - ANSAlkene general formula
CnH2n+1OH - ANSAlcohol general formula
Potassium manganate (VII) and water (purple colour spreads), ammonia and hydrogen chloride (white
ring forms closer to hydrogen chloride), bromine gas and air (brown bromine gas diffuses) - ANS3
experiments to show diffusion
4OH- = O2 + 2H2O + 4E- - ANSHalf equation for hydroxide ions
Moves slowly (on the surface), fizzes, eventually disappears - ANSLithium with water - observations
Moves quickly (on the surface), fizzes rapidly, may ignite - ANSSodium with water - observations
Reacts vigorously, burns with a lilac flame, sometimes explodes - ANSPotassium with water -
observations
Heat copper (in a tube and pass air over it) - ANSExperiment to test the proportion of oxygen in air
Pale blue - ANSSulfur flame colour
Orange/yellow - ANSCarbon flame colour
Downward delivery (it is denser than air) - ANSHow to collect chlorine
2H2O + CaCO3 = CaCl2 + H2O + CO2 - ANSHow to make CO2 in a lab (equation)
It is soluble in water - ANSWhy can CO2 be used in fizzy drinks?
Platinum wire, dip in hydrochloric acid, hold in flame - ANSFlame test wire to use + how to sterilise it
So the gas can dissolve and make the colour change - ANSWhy does litmus paper need to be damp when
testing a gas?
, Hydrochloric acid - ANSAcid added to remove any impurities for the sulphate test
Nitric acid - ANSAcid added to remove any impurities for the halide test
Bleaches damp litmus paper white - ANSTest for chlorine
A group of organic compounds that can all be represented by the same general formula -
ANSHomologous series
Similar chemical properties, a trend in physical properties (boiling points, colour, viscosity) -
ANSMembers of the same homologous series have...
A group of atoms which are arranged or bonded in a particular way and which determine how an organic
compound will react - ANSFunctional group
Carbon to hydrogen bond - ANSAlkane functional group
Carbon double bond - ANSAlkene functional group
Hydroxide bond - ANSAlcohol functional group
Carbon - ANSAn organic compound is one that contains
CnH2n+2 - ANSAlkane general formula
CnH2n - ANSAlkene general formula
CnH2n+1OH - ANSAlcohol general formula
