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Easy Less Easy Medium Less Medium Potpourri 100 200 300 400 500 Final
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100 Easy Write the name of the compounds: CO 2 HNO 3 NH 3 Answer Answer
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Easy 100 Carbon dioxide Nitric acid Ammonia
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200 Easy Determine bond type for C—C C—Cl K—Cl Answer Answer
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Easy 200 Use electronegativity (EN) differences and element types: C—C = 2 nonmetals, same EN, nonpolar covalent C– Cl = 2 nonmetals, v. different EN, polar covalent K– Cl = metal + nonmetal = ionic
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300 Easy List 4 properties of ionic compounds Answer Answer
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Easy 300 -Solids at room temp -Good electrolytes -Crystal lattice structure -Brittle -High melting point -dissociate in water
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400 Easy List 3 properties of molecular compounds Answer Answer
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Easy 400 Low mp solids, liquids or gases at RT Composed of nonmetals Nonelectrolytes (except acids and NH 3 ) Do not dissociate Molecules are smallest units
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500 Easy Write names for the following: Al 2 (SO 4 ) 3 Sn(OH) 4 NH 4 NO 3 Answer Answer
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EASY 500 Aluminum sulfate Tin (IV) hydroxide Stannic hydroxide Ammonium nitrate
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100 Less Easy Calculate the energy associated with light having a frequency of 3.8 x 10 13 Hz Answer Answer
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Less Easy 100 E = hν E = 6.626 x 10 -34 Js X 3.8 x 10 13 Hz E= 2.5 x 10 -20 Joules
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200 Less Easy Determine the wavelength of light with a frequency of 5.40 x 10 15 Hz. Give answer in nanometers. Answer Answer
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Less Easy 200 c=λν 3.00 x 10 8 m/s =λ 5.40 x 10 15 Hz λ =5.56 x 10 -8 m x 1x10 9 nm = 55.6 nm 1 m
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300 Less Easy What is the pH range of a base? Answer Answer
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Final Jeopardy What is Mrs. Dorff’s favorite color? Answer
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Final Jeopardy Answer Yellow!
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Less Easy 300 Above 7
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400 Less Easy What is the pH range of an acid? Answer Answer
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Less Easy 400 Below 7.
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500 Less Easy List 3 properties of acids other than pH. Answer Answer
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Less Easy 500 1.Taste sour 2.React with base to form a salt + water 3.Are electrolytes 4.React with active metals to produce hydrogen gas.
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100 Medium Describe the relationship between wavelength and frequency of light. Answer Answer
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Medium 100 As wavelength gets shorter, frequency gets higher.
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200 Medium Balance and add phases: S + O 2 SO 3 (g) Answer Answer
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200 Medium 2S (s) + 3O 2 (g) 2SO 3 (g)
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300 Medium Choose reaction type: Synthesis, Single Replacement, Double Replacement, Decomposition, Combustion 2S (s) + 3O 2 (g) 2SO 3 (g) Answer Answer
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Medium 300 Synthesis – one product from 2 or more reactants
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400 Properties Balance and State reaction type: K + H 2 OKOH + H 2 Answer Answer
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Medium 400 2K + 2H 2 O2KOH + H 2 Single Replacement: Element + Compound Yields Element Plus Compound
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500 Medium Write the double replacement reaction for: nitric acid + sodium bicarbonate Answer Answer
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Medium 500 HNO 3 + NaHCO 3 NaNO 3 + H 2 O + CO 2(g) This reaction fizzes because H 2 CO 3 spontaneously decomposes to H 2 O and CO 2(g)
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100 Less Medium What visual evidence indicates which substance is the limiting reactant and which is the excess reactant? Answer Answer
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Less Medium 100 After the reaction is done, limiting reactant should be gone some of excess reactant still remains unused.
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200 Less Medium Calculate the mass of Ba(OH) 2. 2H 2 O needed to make 75.0 mL of 0.500 M solution. Answer Answer
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Less Medium 200 Answer Moles = MolarityX Liters = 0.500M X (0.0750 L) = 0.0375 mol Mass = 0.0375 mol x 207.39g/mol = 7.78 g
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300 Less Medium What volume of 0.250 M HCl is needed to make 100.0mL of 0.0500M HCl? Answer Answer
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Less Medium 300 M c V c = M d V d 0.250M X = (0.0600M)(100.0mL) X= 20.0 mL
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400 Less Medium What is the % carbon in ethanol (C 2 H 5 OH)? Answer Answer
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Less Medium 400 Molar Mass = 46.08 g/mol % C = 12.01 X 2 X 100 = 52.13% 46.08
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500 Less Medium Give formulas of 3 different ionic bases. Answer Answer
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Less Medium 500 Ionic Bases are metal hydroxides. examples are: NaOH, LiOH, KOH, Ba(OH) 2, Fe(OH) 3
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100 Potpourri Give the group and period #, group name and properties of an element with valence configuration 4s 2 3d 10 4p 6 Answer Answer
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Potpourri 100 period 4, group 18, noble gases, unreactive, stable gas at room temp
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200 Potpourri A yellow solution is being tested using a Colorimeter. You can use yellow, red, green or violet light. Explain your wavelength choice. Answer Answer
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Answer for Potpourri 200 Best choices would be red or violet. Yellow light would be mostly reflected by a yellow solution. Green is close in wavelength to yellow, so may also have poor absorbance.
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300 Potpourri What is the % yield if theoretical yield for a reaction is 25.0 g yet the reaction gives only 22.5 g of product? Answer Answer
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Potpourri 300 90% yield
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400 Potpourri Write the balanced equation, with phases, for the reaction between nickel(II)nitrate and potassium sulfide. Answer Answer
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Potpourri 400 Ni(NO 3 ) 2(aq) + K 2 S (aq) 2KNO 3(aq) + NiS (s)
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500 Potpourri Why do chemical reactions occur in nature? Answer Answer
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Potpourri 500 To increase stability.
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