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Chapter 1
What is chemical Analysis
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| Identification of chemicals present in a substance or the measurement of their concentration. |
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| Measure of how much solute is dissolved in a quantity of solution. |
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| Process of finding what chemicals are present in the substance. |
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| Process of finding how much chemical is present. |
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Chapter 2
Analysis by mass
Gravimetric Analysis |
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| Quantitative analysis of substances based on the measurement of mass. |
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| Unit used for counting particles. One mole is a standard amount of substance. |
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How to find:
Moles, Mass, Molar Mass |
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Moles = Mass/Molar mass
Mass = Moles x Molar mass
Molar mass = refers to periodic table |
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| 1 atmosphere = 760 mmHg = 101325 Pa = 101.3 kPa |
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| Temp in K = temperature in *c+273 |
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STP- 22.4 mol-1
SLC- 24.5 Lmol-1
n= V/Vm |
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| Simple whole number ratio of atoms present ina compound. |
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Chapter 3
Volumetric Analysis
Concentration |
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| Measure of the amount of solute expressed in molar conc referred to as Molarity. |
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| How to find concentration |
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| Accurately known concentration |
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| Substances that are so pure that the amount of substance in mol can be accurately from their mass. |
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| Reacting a measured volume of a standard solution with a measured volume of the solution of unknown concentration. |
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| Titration at which the indicator changes colour. |
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| Volume measured out by the pipette. |
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| point during the titration when the solutions have been mixed in the mole ratio |
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| The volume of solution delivered by the burette. |
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| gives the actual number of atoms of each element present in a molecule of a compound. |
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| reactant that is completely consumed. |
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Chapter 4
Analysing Acids and Bases
Acids |
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| involve transfer of proton from an acid to a base. |
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| Substances that only differ by one proton. |
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bases that readily accepts protons
bases only accepts protons to a limiting extent. |
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| A technique used when an acid or base is too weak to be analysed by direct titration. |
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Chapter 5
Analysing Oxidants and reductants
Oxidation
Reduction |
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Definition
Oxidation- loses electrons (OIL)
Reduction- gains electrons (RIG) |
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| Oxidising agents or oxidants |
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| substances that cause oxidation to occur. |
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| Reducing agents or reductants |
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| Substances that cause reduction to occur. |
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