processing? Crude oil is the remains of an ancient biomass consisting mainly of plankton that was buried in mud. The potential effects of global climate change include eg sea level rise, which may cause flooding and increased coastal erosion, more frequent and severe storms, changes in the amount, timing and distribution of rainfall, temperature and water stress for humans and wildlife, changes in the. Copper ores are becoming scarce and new ways of extracting copper from low-grade ores include phytomining, and bioleaching. Exam Board, exam, paper, download, aQA, aS and A-level Chemistry (New 2016). How could I make my data more precise? The ratio of the distance moved by a compound (centre of spot from origin) to the distance moved by the solvent can be expressed as its Rf value: Rf distance moved by substance distance moved by solvent Different compounds have different Rf values in different. Desalination can be done by distillation or by processes that use membranes such as reverse osmosis. Draw and use the slope of a tangent to a curve as a measure of rate of change. You should be able to interpret appropriate given data to predict the effect of a change in concentration of a reactant or product on given reactions at equilibrium.
You should be able to identify formulations given appropriate information but you do not need to know the names of components in proprietary products. You should be able to: state examples of natural products that are supplemented or replaced by agricultural and synthetic products distinguish between finite and renewable resources given appropriate information. You should be able to recall how boiling point, viscosity and flammability change with increasing molecular size. Sewage and agricultural waste water require removal of organic matter and harmful microbes. Know how to draw a reaction profile for a catalysed reaction. Reversible Reactions - experiments described and explained Revision Notes.2.5 The effect of changing concentration ( HT only ) Know that if the concentration of one of the reactants or products is changed, the system is no longer at equilibrium and the concentrations of all. The Option Paper as many students. I have taught and written about the Options many times in the past few years and my honest belief is that the Medicinal Chemistry option is the simplest and most sensible to study unless you have a clear strength in Physics or interest in another. The Option forms a much smaller fraction of the overall mark if you are studying it. You should be able to: describe how carbon monoxide, soot (carbon particles sulfur dioxide and oxides of nitrogen are produced by burning fuels predict the products of combustion of a fuel given appropriate information about the composition censoring the internet essay of the fuel and the conditions in which. For example, copper can be obtained from solutions of copper compounds by displacement using scrap iron or by electrolysis.
Most of the compounds in crude oil are hydrocarbons, which are molecules made up of hydrogen and carbon atoms only. The methods used to produce potable water depend on available supplies of water and local conditions. For example, some scrap steel can be added to iron from a blast furnace to reduce the amount of iron that needs to be extracted from iron ore.
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