Chemical Reaction Types & Balancing

To be a neutralization reaction, a reaction MUST

• At least contain an acid
• At least contain a base
• Produce CO₂
• React an acid with a base, and produce water

Identify this type of reaction: 
Al (s) + HCl (aq) → AlCl₃ (aq) + H₂ (g)

• Precipitation
• Synthesis
• Combustion
• Single Replacement

The Law of Conservation of Matter states that the total mass of the reactants should be 

• More than the mass of the products
• Equal to the mass of the products
• Ignored during the reaction
• Less than the mass of the products

Tags

NGSS.MS-PS1-5

Which coefficients are required to correctly balance the equation: 
C₂S₂ + O₂ → CO₂ + S₂O

• 1, 2, 3, 2
• 2, 5, 4, 2 
• 2, 4, 5, 2
• 2, 3, 5, 2 

Tags

NGSS.MS-PS1-5

In a redox reaction, the sum of all oxidation numbers should be equal to ___________ in order to be balanced.

• Zero
• Half of the number of elements
• Always +1
• Always -1

Rust is an example of a redox reaction. What are is required in the formation of rust?

• Iron
• Carbon
• Oxygen
• Sulfur

A change in color, like in the formation of rust, is a key sign of what type of reaction?

• Single displacement
• Oxidation-Reduction (redox)
• Acid-Base/Neutralization
• Precipitation 

In the following reaction, what sign is there that a precipitation reaction took place?
AgNO₃ (aq) + NaOH (aq) → AgOH (s) + NaNO₃ (aq)

• The formation of a nitrate
• The (aq), meaning aqueous or dissolved in water
• The (s), meaning the formation of a solid
• The base (OH) reactant 

Tags

NGSS.MS-PS1-2

Just like in neutralization reactions, the decomposition of an acid will always form 

• A base
• Water
• CO₂
• A solid

Which of the following reactions involves the ions of two compounds exchanging places to form two new compounds?

• Synthesis 
• Double Replacement
• Combustion
• Single Replacement