Rates of reaction
Give an example of a physical change
Freezing, melting, evaporating, condensing, subliming, deposition
Define redox in terms of oxygen
Oxidation is gain of oxygen, reduction is loss
What colour is anhydrous copper sulphate?
White
What is graphite used for and why?
Lubricant as the layers are able to slide due to weak forces of attraction
Which country has the largest population of Tigers?
India
Name the 5 factors that affect the rate of a reaction
Temperature, concentration, surface area, catalysts, pressure
Define redox reactions in terms of electrons (extended)
oxidation is loss, reduction is gain (OIL RIG)
Describe equilibrium in terms of rates of reaction
rate of forward and reverse reaction is equal
How many pairs of electrons are shared in a molecule of carbon dioxide?
4
Which athlete has the most medals in Olympic history?
Michael Phelps
Define what a catalyst is (according to extended level objectives)
Substance that speeds up the rate of a reaction by decreasing the activation energy, but remains unchanged/is not used up at the end of the reaction
What is the oxidation state of an element?
zero
State the conditions for the Haber process (there are 3)
450°C, iron catalyst and 200 atm (20,000kPa)
How does the reactivity of Group 7 change down the group?
Become less reactive
How many hearts does an octopus have?
3
Give two methods that could be used to monitor the rate of reaction between a carbonate and an acid
Change in mass (from loss of carbon dioxide) or gas syringe to measure volume of gas
What is the oxidation state of a halide ion?
-1 (sign must be before value)
How does a catalyst alter the position of an equilibrium?
It does not affect equilibrium (speeds up forwards and reverse, reach equilibrium faster)
Name two greenhouse gases (from C10)
carbon dioxide and methane
What is the name of the monster in Stranger Things?
The Demogorgon
How does changing the concentration affect the rate of reaction, described in terms of collision theory.
Increased number of particles
More frequent, successful collisions
What is the oxidation state of manganese in the manganate ion MnO4-?
+7
What is the catalyst used in the contact process?
vanadium (V) oxide
What colour is barium in flame testing?
green
Where were French fries invented? HINT: its not France, but it is a European country
Belgium