Balancing Chemical Equations and Types of Equations

One of the common chemical weathering agent that affects rocks and soil is carbonic acid (H₂CO₃). It is produced when carbon dioxide reacts with water.

CO₂ + H₂O = H₂CO₃

This reaction is a type of what chemical reaction?

(a)  

Tags

NGSS.MS-PS1-1

Which type of reaction is:

2 NaBr + Ca(OH)₂ → CaBr₂ + 2 NaOH

• Synthesis
• Single Displacement
• Double Displacement
• Combustion

Which type of reaction is: C₂H₄ + 3 O₂ → 2 CO₂ + 2 H₂O

(a)  

Which type of reaction is:

2 H₃AsO₄ → As₂O₅ + 3 H₂O

(a)  

When carbonic acid mixes with rain water and perculates on rocks that contains limestone, it makes the rocks weak forming carbon bicarbonate.

CaCO₃ + H₂CO₃ = Ca(HCO₃)₂

This is an example of which type of chemical reaction?

(a)  

Sodium phosphate is a common component of rocks. When it reacts to potassium hydroxide, it forms an alkali compound of NaOH and potassium phosphate.

Balance the reaction by identifying the correct coefficients:

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

• 1,3,3,1

• 1,3,2,1

• 2,3,3,1

• 1,1,3,1

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

When balancing equations, the rule is that you can only add, change, and remove

(a)  

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.HS-PS1-7

The following reaction is an example of what reaction type? 
CoCO₃ → CoO + CO₂

• Synthesis
• Decomposition
• Single Replacement
• Double Replacement

__H₂O₂ --> __H₂O + __O₂

• already balanced
• 2,1,1
• 2,2,1
• 2,1,2

Tags

NGSS.MS-PS1-5