level CCP chemistry – midterm exam review packet – january 2014 – open-ended problems
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The midterm exam will cover chapters 1-11 (excluding 7.3 and 10.3). You should review your assignments
such as review sheets, notes, textbook, lab reports, and old tests. A thorough review can substantially improve your
exam grade. Do not expect to cover all of the material from an entire semester in an hour or two.
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The exam will be in two parts:
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part I: ‘multiple choice’
There are 60 of these questions and they may require recall, reasoning, and short calculations. Answer all
of the multiple choice questions. There is no advantage in leaving a question blank.
part II: ‘problems and essays’
(possibly on a lab experiment), and equations (5 questions total) – A complete set-up and correct solution
(including units) must be provided for each in order to get full credit. An essay can be answered in a few
paragraphs. In the last question, reactants are provided and their products must be predicted and the
correct chemical equation written and balanced.
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References will be provided to you. They include a periodic table, ion chart, and equation/constant sheet. You will
also need a calculator and number 2 pencils.
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midterm exam review problems:
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1. Calculate the volume of 6.46 g of lead. The density of lead is 10.9 g/cm3.
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2. Draw representations of the five models of the atom from Dalton to our modern model. Give a brief description
of what each model included that earlier models did not.
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3. Describe the overall organization of the periodic table. Pick a pair of elements in the same group, describe how
they could be expected to be similar or different. Pick another pair of elements that are in the same period with
each other. Describe in what ways they might be similar or different.
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4. In every chemical reaction new substances with different properties are formed. Since atoms are not created,
destroyed, or changed into different elements during a chemical reaction, how can new substances be formed?
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5. Draw the Lewis structure for sulfur dichloride, SCl2. State the shape, bond angle, and whether the molecule is polar or non-polar.
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6. Calculate the percent composition by mass of NaN .
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7. Calculate the number of moles, molecules and atoms in 4.21 grams of NaOH.
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8. Write the orbital diagram, electron configuration, and Lewis dot structure for iron, Fe.
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9. The frequency of a photon of light is 5.78 x 10 Hz. Calculate its wavelength and its energy.
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10. The wavelength of a photon of light is 3.24 x 101-7 m. Calculate its frequency and its energy.
11. Some problems may relate to interpretation of lab data – reading charts and/or graphs, drawing conclusions
from observations, etc. Some calculations may be needed to do these problems. Review the calculation/results
sections of your lab reports/notebook.
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12. Determine the products of these reactions, then write and balance equations for the reactions.
a. iron + sodium chloride ! → ?
b. magnesium + hydrochloric acid ! → ?
c. aluminum nitrate + sodium phosphate ! → ?
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d. pentane (C5H12) + oxygen ! → ?
level CCP chemistry – midterm exam review packet – january 2014 – review topics
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matter and measurement (ch. 1-3)
• metric units
• significant figures
• uncertainty in measurement
• matter
• properties and changes
• density
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atomic structure (ch. 4)
• atomic models
• structure of the atom
• chemical symbols
• isotopes and ions !
electronic structure (ch. 5)
• bohr model
• quantum mechanics
• electron configuration
• orbital diagrams !
periodic table (ch. 6)
• organization
• arrangement
• periodic trends !
compounds & chemical bonding (ch. 7-9)
• ionic bonding
• covalent bonding
• naming ionic and covalent compounds (and acids)
• writing formulas for ionic and covalent compounds (and acids) !
chemical reactions (ch. 11)
• balancing and classifying equations
• predicting reactions !
chemical quantities: the mole (10.1,10.2)
• molar mass and mole conversions
• percent composition