I am a brown liquid. I am used to determine the presence of an alkene. When we react, we form a colourless solution
What is bromine water (Br2)
100
Sometimes I am invisible. Sometimes I am pink. I am often used in titrations to help see the end-point
What is phenolphthalein
100
An instrumental analytical method that makes use of a flame to determine the concentration of elements
What is Atomic Absorption Spectroscopy
100
Leaching from the soil and hydrothermal vents on the ocean floor
What is the source of minerals in the oceans
100
The process of starting an addition polymerisation reaction involving the introduction of a free radical which reacts with a double bond
What is initiation
200
I am the most abundant polymer on Earth. I form a large proportion of the biomass. I am the the main constituent in the cell walls of plants. I am made of glucose monomers, similar to starch except my glucose units are alternating.
What is cellulose
200
When a system at equilibriumis subjected to a change, the system will adjust to re-establish equilibrium by partially counteracting that change
What is Le Chatelier's Principle
200
A process for producing ammonia developed by a German chemist.
What is The Haber Process
200
The process of a metal being converted to its ionic form
What is oxidation
200
The process of ensuring the accurate concentration of a titrant
What is standardisation
300
If you dehydrate me using concentrated sulfuric acid, I produce ethane. If you oxidise me, I produce ethanoic acid, which makes wine taste like vinegar.
What is ethanol
300
A gas that is formed from the the burning of contaminated coal and can cause acid rain to form in the atmosphere
What is sulphur dioxide
300
Conditions that favour the forward reaction in the equilibrium of the Haber Process
What is high pressure and low temperature
300
Changes in concentration, surface area of electrodes and separation distance of electrodes in electrolysis
What are the factors that effect the rate of electrolysis
300
the name of an ester made from ethanoic acid and propanol
What is propyl ethanoate
400
The conditions that are ideal for fermentation of sugars to ethanol
What is 37C, anaerobic, presence of yeast
400
A model of acids and bases that describes an acid as a proton donor and a base as a proton acceptor
What is the Bronsted-Lowry Acid Base Theory
400
This test measures the amount of organic contamination in water.
What is biochemical oxygen demand (BOD)
400
Organisms responsible for an unexpected lowering of pH in very deep ocean water
What is sulfate reducing bacteria
400
a method of protecting a metal object by attaching another metal to be oxidised, whereby this oxidised metal is attached to the anode of a power supply
What is impressed current
500
I am made from electrolytes that are in paste form rather than liquids. I come in acidic and alkaline forms. I am relatively cheap compared to other types and I am sometimes known by the name Leclanche.
What is a dry-cell battery
500
measuring the volumes of solutions involved in chemical reactions. An example of this is titration.
What is volumetric analysis
500
mg/kg or mg/L
What is parts per million (ppm)
500
Chemical added to solutions that are used to ensure leather artifacts retain their softness
What is polyethylene glycol (PEG)
500
The quantitative result of the addition of sodium acetate to an ethanoic acid solution
What is an increase in pH or lowering of H ion concentration