C6 - The Rate and Extent of Chemical Change
What is collision theory?
For a chemical reaction to take place the reactant particles must collide with one another.
What is a hydrocarbon?
A compound made from only hydrogen and carbon
Define a pure substance
A substance made of only one type of element or compound
Where did CO2 in our atmosphere originate from?
Volcanoes
Define potable water
Water that is safe to drink
What is the quantity of energy needed for a reaction to start called?
Activation energy
What is the general formula of an alkane?
CnH2n+2
What is the alternate name for the chromatography paper?
Stationary Phase
What gas makes up 78% of our atmosphere?
Nitrogen
True or false
All potable water is pure
Which 4 factors affect rate of reaction?
Particle size, temperature, concentration and pressure
Ethene, Propene and Butene
What word should you use to describe the mobile phase?
Solvent
What is NH3 better known as?
Ammonia
What does an LCA assess?
The environmental impact of a product
Describe the function of a catalyst
Increase the rate of reaction by providing an alternate pathway with a lower activation energy, and they are not used up
What is the general formula of an alkene?
CnH2n
What number is an Rf value always lower than?
1
What type of radiation is trapped in our atmosphere to cause the greenhouse effect?
Long Wave/Infrared
When doing the water analysis experiment, what 2 mass measurements do we need to take?
Basin, and Basin and contents
The disappearing cross is what form of reaction?
Precipitation
What do you calculate about a graph to determine rate of reaction?
Gradient
The solvent moved 36mm, and the ink dot travelled 14mm. What is the Rf value?
Give your answer to 2 significant figures.
0.39
What environmental effect do carbon particulates cause?
Global Dimming
What do we use to anaerobically treat sewage?
Bacteria