Chemistry Corner

3Ca + 2AlCl₃ --> 3CaCl₂ + 2Al

• Synthesis
• Decomposition
• Single diplacement
• Double displacement

3KOH + H₃PO₄ --> K₃PO₄ + 3H₂O

• Synthesis 
• Decomposition
• Single displacement
• Double displacement

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

• Decomposition
• Single Replacement
• Combustion
• Double Replacement

When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced

• charge
• subscript
• random number
• coefficient

Balance this equation:
 __Li + __Cl₂ -> __LiCl

• 2Li + Cl₂ -> 4LiCl₂
• 2Li + Cl₂ -> LiCl₂
• 2Li +  Cl₂ -> 2LiCl

Tags

NGSS.HS-PS1-7

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

• the product is doubled
• the product is half the mass of the reactants
• the mass is the same
• the mass changes depending on the reaction

Tags

NGSS.HS-PS1-7

The number of atoms you begin with in a chemical reaction ...

• must be the same as the number of  atoms you end with
• must be an even number
• can be different to the number you finish with
• changes depending on how much energy is formed

Tags

NGSS.HS-PS1-7

Balancing the following:

____ Al + ____ HCl → ____ AlCl₃ + ____ H₂

• 1,3,1,2
• 2,3,2,3
• 2,6,2,3
• 3,2,6,2

Tags

NGSS.HS-PS1-7

Balance the following: Fluorine and Aluminum oxide react to produce Aluminum fluoride and Oxygen

• 6,2,4,3
• 3,4,2,6
• 5,1,3,2
• 3,2,4,3

Which of the following is an example of a chemical change?

• melting a stick of butter
• dissolving salt in water
• using magnesium to displace hydrogen gas from water

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5