Easy Less Easy Medium Less Medium Potpourri Final

100 Easy Write the name of the compounds: CO 2 HNO 3 NH 3 Answer Answer

Easy 100 Carbon dioxide Nitric acid Ammonia

200 Easy Determine bond type for C—C C—Cl K—Cl Answer Answer

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

300 Easy List 4 properties of ionic compounds Answer Answer

Easy 300 -Solids at room temp -Good electrolytes -Crystal lattice structure -Brittle -High melting point -dissociate in water

400 Easy List 3 properties of molecular compounds Answer Answer

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

500 Easy Write names for the following: Al 2 (SO 4 ) 3 Sn(OH) 4 NH 4 NO 3 Answer Answer

EASY 500 Aluminum sulfate Tin (IV) hydroxide Stannic hydroxide Ammonium nitrate

100 Less Easy Calculate the energy associated with light having a frequency of 3.8 x Hz Answer Answer

Less Easy 100 E = hν E = x Js X 3.8 x Hz E= 2.5 x Joules

200 Less Easy Determine the wavelength of light with a frequency of 5.40 x Hz. Give answer in nanometers. Answer Answer

Less Easy 200 c=λν 3.00 x 10 8 m/s =λ 5.40 x Hz λ =5.56 x m x 1x10 9 nm = 55.6 nm 1 m

300 Less Easy What is the pH range of a base? Answer Answer

Final Jeopardy What is Mrs. Dorff’s favorite color? Answer

Final Jeopardy Answer Yellow!

Less Easy 300 Above 7

400 Less Easy What is the pH range of an acid? Answer Answer

Less Easy 400 Below 7.

500 Less Easy List 3 properties of acids other than pH. Answer Answer

Less Easy Taste sour 2.React with base to form a salt + water 3.Are electrolytes 4.React with active metals to produce hydrogen gas.

100 Medium Describe the relationship between wavelength and frequency of light. Answer Answer

Medium 100 As wavelength gets shorter, frequency gets higher.

200 Medium Balance and add phases: S + O 2 SO 3 (g) Answer Answer

200 Medium 2S (s) + 3O 2 (g) 2SO 3 (g)

300 Medium Choose reaction type: Synthesis, Single Replacement, Double Replacement, Decomposition, Combustion 2S (s) + 3O 2 (g) 2SO 3 (g) Answer Answer

Medium 300 Synthesis – one product from 2 or more reactants

400 Properties Balance and State reaction type: K + H 2 OKOH + H 2 Answer Answer

Medium 400 2K + 2H 2 O2KOH + H 2 Single Replacement: Element + Compound Yields Element Plus Compound

500 Medium Write the double replacement reaction for: nitric acid + sodium bicarbonate Answer Answer

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)

100 Less Medium What visual evidence indicates which substance is the limiting reactant and which is the excess reactant? Answer Answer

Less Medium 100 After the reaction is done, limiting reactant should be gone some of excess reactant still remains unused.

200 Less Medium Calculate the mass of Ba(OH) 2. 2H 2 O needed to make 75.0 mL of M solution. Answer Answer

Less Medium 200 Answer Moles = MolarityX Liters = 0.500M X ( L) = mol Mass = mol x g/mol = 7.78 g

300 Less Medium What volume of M HCl is needed to make 100.0mL of M HCl? Answer Answer

Less Medium 300 M c V c = M d V d 0.250M X = (0.0600M)(100.0mL) X= 20.0 mL

400 Less Medium What is the % carbon in ethanol (C 2 H 5 OH)? Answer Answer

Less Medium 400 Molar Mass = g/mol % C = X 2 X 100 = 52.13% 46.08

500 Less Medium Give formulas of 3 different ionic bases. Answer Answer

Less Medium 500 Ionic Bases are metal hydroxides. examples are: NaOH, LiOH, KOH, Ba(OH) 2, Fe(OH) 3

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

Potpourri 100 period 4, group 18, noble gases, unreactive, stable gas at room temp

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

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.

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

Potpourri % yield

400 Potpourri Write the balanced equation, with phases, for the reaction between nickel(II)nitrate and potassium sulfide. Answer Answer

Potpourri 400 Ni(NO 3 ) 2(aq) + K 2 S (aq) 2KNO 3(aq) + NiS (s)

500 Potpourri Why do chemical reactions occur in nature? Answer Answer

Potpourri 500 To increase stability.