Transcript Lab Final Review

Lab Final Review
Spring 2013
Chem 1111
Format of the Final Exam
• Definitions, calculations, short answer,
True/false
• Questions from all labs
– Know terms and calculations associated with each
experiment; Safety precautions
– Know glassware and equipment used throughout
semester.
• Parts of a Scientific Report: Writing Lab
Reports and Scientific Papers
- Know what goes into each part
(More next page)
• Safety Rules
• MSDS What is it and what info is in it (see
examples in Lab 9A)
• Techniques and procedures
• Plotting Data and the meaning of a graph
General Calculations for Chemistry:
• Know how to perform all calculations
– Density,
– mols,
– molecular weight,
– Concentration: M, % water, % yield
– Hydrates
– Titrations
– Mole-to-mole ratios in stoichiometry
– Limiting reactant
FOCUS of the final exam: Study
these in great detail and know how
to do the calculations:
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Exp 4B – Ionic Reactions in Aqueous Solutions
Exp 4C – How Much Acetic Acid is in Vinegar?
Exp 7 – The Absorption Spectrum of CoCl2
Exp 9A – The Identity of an Insoluble
Precipitate
• ALL OTHER EXPERIMENTS- just read over the
basics as a foundation and look over what
methods were used
Exp 4B – Ionic Reactions in
Aqueous Solutions
• Write and Balance Ionic Equations, net ionic
equations
• Use solubility tables to predict formation of
precipitates
• How to use critical thinking and the process of
elimination to identify unknowns from sets of
reactions
• Compare results to identify an unknown
Exp 4C – How Much Acetic Acid is
in Vinegar?
• Know what a titration is and why we do them.
• Macid Vacid = Mbase Vbase for a mole ratio of 1:1
• Macid Vacid x b moles = Mbase Vbase for a mole ratio
other than 1:1
• Difference between endpoint and equivalence
point
• Role of indicator and pH in titration
• Calculations for % acid
• Study the links on titration technique
Exp 7 – The Absorption Spectrum
of CoCl2
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Beer’s Law – in words and as an equation
The meaning of a standard curve
How to use linear regression
How to find standard deviation and use it in
reporting experimental values
• How a spectrophotometer works
Exp 9A – The Identity of an
Insoluble Precipitate
• Know how to use stoichiometry to calculate
limiting reagents
• Use ratios to identify the product
• Draw Lewis structures of related ions
• Know how to read and interpret an MSDS
sheet
Exp 1C –Some Measurements of
Look over only
Mass and Volume
• Know how to correctly measure volume, mass
– Uncertain digits!!!
• Calculate density
• Use correct sigfigs
• How to use standard deviation on a set of data
(formula will be provided)
Exp 1A – Identification of An
Look over only
Unknown Compound
• Physical vs. chemical properties
• How density and boiling point are useful in
identifying unknown liquids
• How to use critical thinking and the process of
elimination to identify unknowns from sets of
reactions
Exp 3A – The Empirical Formula of an
Look over only
Oxide
• Know the difference between mixtures,
elements, pure substances.
• Heating, Combustion/ignition techniques
• Know the sequence of calculations:
– Stoichiometry
– Mass and %
Exp 3B – Hydrates and their Thermal
Decompositions
Look over only
• Calculate % water
• Calculate formula of hydrate
Exp 4A – Conductivity of Aqueous
Look over only
Solutions
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Indications of a reaction
Types of reactions observed
Balance chemical equations
Write Ionic Equations
Know the effects of adding two solutions of
ionic compounds, additivity principle,
solutions of an acid and a base
Exp 19A – Oxidation – Reduction
Look over only
Reactions
• Identify:
• Substance oxidized, reduced
• Reducing agent, oxidizing agent
• Make inferences from observed changes
Exp 6 – Thermochemistry and
Look over only
Hess’s Law
• Exothermic vs. endothermic
• Basis for calorimetry
• Define free energy, entropy, enthalpy (temp
change)
• Draw a cooling/heating curve and know how
to extrapolate values graphically