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Revision Notes [print-friendly version]
Chapter 12 - The Mole
- Be able to define relative Atomic Mass, isotope,
- Be able to calculate the relative atomic mass given the percentages of the isotopes of an element or given a mass spectrum.
- Be able to define the mole, molar mass, Avogadro’s Number NA and amount of a substance.
- Be able to calculate the molar mass of various substances.
- Be able to do simple calculations using the formula; n = m/M
- Know the meaning of empirical formula and molecular formula.
- Be able to determine the empirical and molecular formula given the percentages by mass of the various elements and the molar mass.
- Be able to determine the percentages of elements by mass, given the formula.
- Know the molar volume of a gas at STP.
- Be able to convert the amount of a gas to moles at STP and the amount to volume.
Chapter 13 - Stoichiometry
- Be aware of all the information you can infer from a chemical equation. - Re amount (in moles), molecules, mass and volume (for gases).
- Be aware of the things an equation does not tell you about the reaction.
- Be able to do mass-mass problems.
- Be able to do mass-mass problems where won reactant is a limiting reactant.
Chapter 14 - Quantities in Solution
- Be aware of the meaning of the terms solute, solvent and solution.
- Know the meaning of the terms concentration, molarity
- Be able to use the formula; c = n/V - concentration problems.
- Know how to make up a solution of a particular concentration.
- Be able to calculate the concentrations of ions in solution, given the concentration of the solute.
- Be able to calculate the new concentrations when solutions are diluted.
- Be able to do stoichiometric calculations using concentrations, mass and volumes (see page 198).
Chapter 15 - Introducing chemical analysis
- Know the difference between Qualitative Analysis and Quantitative analysis.
Chapter 16 - Qualitative Analysis
- Be able to briefly explain what Chromatography is - paper chromatography and thin-layer chromatography.
- Be able to draw a chromatogram and calculate the Rf value.
- Be able to use Rf values to identify an unknown substance using standard Rf values.
- Be able to explain flame emission spectra
- Be able to use tables to identify cations and anions from chemical tests.
Chapter 17 - Quantities in Solution
- Know the meaning of the term volumetric analysis
- Be able to define - volumetric analysis, standard solution, primary standard, secondary standard, standardisation, titration, equivalence point, end-point, indicator,
- Know how to perform the experimental procedure of a titration. Know the techniques required for the use of a burette, pipette, volumetric flask etc.
- Be able to do volumetric analysis problems.
- Be able to do back titration problems and gravimetric analysis problems.
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