Chemistry B Final Exam Jeopardy!

Chemical Reactions

100

What are the 4 indicators of a chemical change? 

1. Color change 

2. Temp change 

3. Formation of a gas (bubbling, fizzing) 

4. Formation of a precipitate (solid) 

200

What type of chemical is this? 

Mg + O2 -->

Synthesis

300

What is the chemical formula for strontium hydroxide? Is this an acid or a base?

Sr(OH)₂

Base

400

Balance this equation. What type of reaction is this? 

Al + Fe₂O₃ --> Al₂O₃ + Fe

2Al + Fe₂O₃ --> Al₂O₃ + 2Fe

Single Replacement

500

Predict the products of this reaction and balance. 

Chlorine gas + Aluminum Iodide --> 

3Cl₂ + 2AlI₃ --> 2AlCl₃ + 3I₂

Stoichiometry

100

What is Avogadro's number and what does it represent? 

6.02X10²³ atoms/molecules/particles 

Represents how many atoms/molecules/particles are in 1 mole of a substance 

200

NH₄NO₂ --> N₂ + 2H₂O 

Given the balanced reaction above, how many moles of ammonium nitrate do you need to produce 13 moles of water? 

6.5 moles NH₄NO₂                 

300

Baking soda has the chemical formula of NaHCO_3. What is the molar mass of baking soda and what are the units? 

83.98 g/mol

400

How many grams are in 8.5 moles of phosphorus pentachloride?

1,769.87 grams PCl₅

500

N₂ + 3H₂ --> 2NH₃

How many grams of ammonia can you produce if you have 115 grams of hydrogen gas? 

646.73 grams NH₃

Solutions & Concentrations

100

HBr (aq) + LiOH (aq) --> LiBr (aq) + H₂O (l) 

What does the (aq) symbol indicate in this reaction?

HBr, LiOH, and LiBr are dissolved in water

200

Draw a particle diagram of a saturated solution. 

Coach Turner will draw

300

What is the percent concentration for a solution that contains 45 grams of Kool aid powder in 175 grams of water? 

20.45%

400

How many liters of water would you need for a 0.85 M solution that contains 24 moles of glucose? 

28.24 L

500

A make a solution that is 36 grams of salt (sodium chloride) and 350 mL of water. What is the molarity?

1.76 M

Acids/Bases

100

Give two properties of acids and bases. 

Acids: produce H⁺ ions, sour/tart, pH < 7

Bases: produce OH^- ions, bitter, pH > 7

200

Fill in the blanks: Under the Arrhenius definition of Acids/Bases, acids increase the concentration of ______________ ions in an aqueous solution, while bases increase the concentration of ______________. Under the Bronsted-Lowry definition, acids are proton ____________ and bases are proton ______________.

H+, OH-, donors, acceptors

300

What is the pH range for alkaline solutions? 

Alkaline=Basic (7.1-14) 

400

Why do we use phenolphthalein in a titration?

To see the equivalence point when the solution is neutralized

500

You titrate 450 mL of 0.65 M magnesium hydroxide with 890 mL of an acid with unknown concentration. What is the molarity of the acid?

M_A=0.33 M 

Random

100

Explain how the conservation of mass applies to balancing chemical equations. 

Law of conservation of mass states that Mass cannot be created or destroyed. When balancing a chemical reaction, there has to be the same amount of atoms the reactants as there are in the products because they are not created or destroyed. 

200

What are the diatomic elements? What state of matter are they in their natural form? 

H₂  O₂  F₂  I₂  N₂  Br₂  Cl₂ 

Gases in their natural form 

300

What is the chemical formula for Nickel (II) chloride?

NiCl₂

400

Predict the products of this reaction and balance: 

C₃H₈ + O₂ -->

C₃H₈ + 5O₂ --> 3CO₂ + 4H₂O

500

How many molecules of glucose (C₆H₁₂O₆) are in 25 grams? 

8.36 X 10²² molecules of glucose