Balancing Act
Reaction Action
State Symbols
The Basics
Review
100
These are the numbers placed in front of formulas; you can change them, but you can never change subscripts
What are Stoichiometric Coefficients?
100
Two or more substances react to form one single product (A + B → C)
What is Combination Reaction?
100
This symbol indicates a substance is dissolved in water
What is Aqueous?
or (aq)
100
These are the substances found on the left side of the arrow in a chemical equation
What are Reactants?
100
The amount of nanograms in one milligram
What is 1,000,000 nanograms?
(106 ng)
200
When balancing, you should start with the molecule that contains the ______ ______
What is Most Atoms?
200
One substance breaks down into two or more other substances (C → A + B)
What is Decomposition Reaction?
200
This symbol would be used for a strip of Zinc metal or a pure gold bar
What is (s)?
(Or solid)
200
According to the Law of Conservation of Mass, atoms are neither ______ nor ______ in a reaction
What is Created nor Destroyed?
200
To balance the combustion of Ethane (C₂H₆), you must use a fraction (7/2) and then do this to the entire equation
What is multiply by 2?
(to get whole numbers)
300
Coefficients of: __CH₄ + __O₂ → __CO₂ + __H₂O
What are 1,2, 1, 2?
300
These rapid reactions always produce a flame and require Oxygen (O₂) as a reactant
What are Combustion Reactions?
300
In the reaction of methane and oxygen, water is produced as this state of matter
What is (g) or Gas (water vapor)?
300
The total Oxygen atoms on the product side of this balanced equation: 2 H₂ + O₂ → 2 H₂O?
What is 2 Oxygen atoms?
300
The amount of significant figures in the measurement 63.45678
What is 7?
400
Coefficients of: __Al + __HCl → __AlCl₃ + __H₂
What are 2, 6, 2, 3?
400
Predict the two products of any hydrocarbon combustion reaction
What are CO₂ and H₂O?
400
Identify the physical state of NaCl in this reaction: HCl(aq) + NaHCO₃(s) → CO₂(g) + H₂O(l) + NaCl(aq)
What is Aqueous?
(it means dissolved in water)
400
The amount of Hydrogen atoms found in the reactants of: HCl(aq) + NaHCO₃(s)
What is 2 hydrogen atoms?
(One in HCl, one in NaHCO₃)
400
The number of protons, neutrons, and electrons in an atom of ¹⁹F
What is 9, 10, and 9?
Protons: 9
Neutrons: 10
Electrons: 9
500
When solid potassium chlorate is heated, it decomposes to form solid potassium chloride and oxygen gas.
2KClO₃(s) ---> 2KCl(s) + 3O₂(g)
500
Classify this specific reaction: 2 NaN₃ (s) → 2 Na (s) + 3 N₂ (g)
What is Decomposition?
500
Hydrochloric acid in aqueous solution reacts with solid sodium hydrogen carbonate to produce carbon dioxide gas, liquid water, and sodium chloride dissolved in water.
Write the correct state symbols for each chemical species, from left to right.
What are (aq), (s), (g), (l), and (aq)?
remember last one is aq b/c it's dissolved in water.
500
Why can you never change a subscript in a formula to balance an equation? (sorry not in jeopardy format) 
It changes the identity of the substance.
500
Name the following acids: HCN, H₂SO₃, HCl, and HClO₄.
What is hydrocyanic, sulfurous, hydrochloric, perchloric?
HCN — Hydrocyanic acid
H₂SO₃ — Sulfurous acid
HCl — Hydrochloric acid
HClO₄ — Perchloric acid