Chemical Reactions

Which of the following is not evidence of a chemical reaction?

• Formation of a precipitate
• Production of gas
• Change in temperature
• Change in state of matter

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

A chemical reaction is...

• when a substance is mixed with another substance
• when a substance undergoes a change to form a new substance
• when a substance is dissolved into another substance
• when a substance is heated or exposed to another substance

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Translate the following word equation: 
Liquid nitrogen and oxygen gas combine to form nitrogen monoxide gas. 

• N + O → NO
• N₂ + O₂ → N₂O₂
• N_2(l) + O_2(g) → NO_(g)
• N_(l) + O_2(g) → NO_(g)

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

NGSS.MS-PS1-1

Aqueous means...

• dissolved in water/solution
• water
• liquid
• plasma

Mass cannot be ____ or _____.

• made, changed
• created, destroyed
• rearranged, unmade
• stagnant, unchanging

Tags

NGSS.MS-PS1-5

Balance the following equation:
____MgO + ____H₂O → ____Mg(OH)₂

• 1,1,1
• 1,2,2
• 2,3,4
• 2,2,2

What type of reaction is the following:
CH₄ + O₂ → CO₂ + 2H₂O

• double replacement
• single replacement 
• combustion
• synthesis

Tags

NGSS.MS-PS1-5

A precipitate is...

• a solid that falls out of a liquid solution
• a reactant in a reaction
• a clear substance
• the mass of a product

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-1

Predict the products of the following equation: Mg + AgCl →

• No reaction
• MgAg + Cl₂
• products are unpredictable
• MgCl₂ + Ag

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Predict the products of the following reaction: Pb(NO₃)₂ + 2KI → 

• PbI₂ + K(NO₃)
• PbK + I(NO₃)
• no reaction
• PbK(NO₃) + I₂ 

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2