Introduction to Chemical Reactions - Balance & Identify Type

Which type of reaction is Al  +  O₂   → Al₂O₃?

• composition
• decomposition
• single replacement
• combustion

Tags

NGSS.HS-PS1-2

Identify the type of chemical reaction demonstrated by this equation:
KClO₃  →  KCl  +  O₂

• decomposition
• combustion
• compositions
• single replacement

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which type of chemical reaction is this an example of?
Fe₂(SO₄)₃  + KOH →  K₂SO₄  +  Fe(OH)₃

• composition
• double replacement
• single replacement
• combustion

Identify the type of reaction shown by this chemical equation:
Al  +  HCl  →  AlCl₃  +  H₂

• single replacement
• composition
• double replacement
• decomposition

Which is the correctly balanced equaition?

• Cl₂ + 2NaI → 2NaCl + I₂

• Cl₂ + 2NaI → NaCl + 2I₂

• Cl₂ + NaI → NaCl + I₂

• 2Cl₂ + NaI → 2NaCl + I₂

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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 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

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

• Synthesis 
• Double Replacement
• Combustion
• Single Replacement