Chemistry Paper 2 Flashcards
gradient = ?
change in up/change in across
one way to collect gas?
what are 2 errors?
using inverted measuring cylinder and a tube through it.
gas already being in the measuring cylinder. Gas lost before you get the bung on.
for rate of reaction, the higher the……
temperature the faster the rate of reaction will be. This is because the particles have more energy so they can move around faster leading to more frequent successful collisions.
Lump means…
Powder has…
less surface area so less space to react.
more surface are so the particles are available to react.
The larger the surface area…
the faster the rate of reaction this is because there are more particles available to react leading to more successful collisions.
High pressure and high concentration means…
there are more of them meaning they are more likely to collide and react.
the higher the pressure or concentration…
the faster the rate of reaction will be because of more particles in a fixed volume so there is a higher chance of a successful collision.
a catalyst…
lowers the activation energy.
crude oil is…
a mixture of different length hydrocarbons.
alkanes?
single bonds only.
CnH2n+2
cracking using…
heat and a catalyst.
test for alkenes?
bromine water goes from orange to colourless
Alkenes?
CnH2n
complete combustion?
hydrocarbon + oxygen ——> water + carbon dioxide
incomplete combustion?
hydrocarbon + oxygen ——-> water + carbon dioxide + carbon monoxide + carbon
