Balancing and Types of Reactions Practice

Which of the following is an example of synthesis?

• Na + Br₂ --> NaBr
• KClO₃ --> KCl + O₂
• HgO + Cl₂-->HgCl + O₂
• Cl₂ + NaBr --> NaCl + Br₂

Balance this reaction:

____ Na₃PO₄ + ____ KOH ---> ____ NaOH + ____ K₃PO₄

• 1,3,3,1

• 1,3,2,1

• 2,3,3,1

• 1,1,3,1

Tags

NGSS.HS-PS1-7

3Ca + 2AlCl₃ --> 3CaCl₂ + 2Al

• Synthesis

• Decomposition

• Single replacement

• Double replacement

Which reaction type is the following: C₅H₁₀O₄ + O₂ --> CO₂ + H₂O

• Decomposition
• Single Replacement
• Combustion
• Double Replacement

3KOH + H₃PO₄ --> K₃PO₄ + 3H₂O

• Synthesis 

• Decomposition

• Single replacement

• Double replacement

What is the little number after an element in a chemical equation called.
Example: H₂

• Coefficient 
• Subscript
• Atom
• Equation

Balance this equation
_Zn+_HCl-->_ZnCl₂ +_H₂

• 1,1,2,1
• 1,1,1,2
• 1,2,1,1
• 2,1,1,1

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-7

Which side of a chemical equation is the reactant side?

• Left (before the arrow)

• Right (after the arrow)

What does the Law of Conservation of Mass state?

• Matter cannot be gained or lost in a chemical reaction.
• Matter can only be lost in a chemical reaction.
• Matter can only be gained in a chemical reaction.
• Matter can be gained and lost in a chemical reaction. 

Tags

NGSS.HS-PS1-7

Number of H in 3(NH₄)₂CrO₄

• 4
• 6
• 8
• 24