Which of the following shows the correct way to balance the chemical equation? Fe + O 2 -> Fe 2 O 3

None of the options are correctly balanced.

_Na 3 PO 4+ _KOH ---> _NaOH + _ K 3 PO 4

1 Na 3 PO 4 +3 KOH ---> 3 NaOH + 1 K 3 PO 4

2 Na 3 PO 4 +2 KOH ---> 3 NaOH + 1 K 3 PO 4

1 Na 3 PO 4 +2 KOH ---> 2 NaOH + 1 K 3 PO 4

3 Na 3 PO 4 +3 KOH ---> 3 NaOH + 1 K 3 PO 4

Which equation above represents a precipitation reaction?

AgNO 3 ( aq ) + NaOH ( aq ) → AgOH ( s ) + NaNO 3 ( aq )

H 2 CO 3 ( aq ) → CO 2 ( g ) + H 2 O ( l )

H 2 SO 4 ( aq ) + 2NaOH ( aq ) → Na 2 SO 4 ( aq ) + 2H 2 O ( l )

2H 2 ( g ) + O 2 ( g ) → 2H 2 O ( l )

In order for a single-replacement reaction to occur, what must be true?

The element that is doing the replacing must be more reactive than the element being replaced. The higher the element is on the activity series, the more reactive it is.

The element that is being replaced must be more reactive than the element doing the replacing. The higher the element is on the activity series, the more reactive it is.

Unit 05 - Balancing Equations and Types of Reactions Review

Authored by Amber Freeman

Chemistry

10th - 11th Grade

NGSS covered

Used 64+ times

Unit 05 - Balancing Equations and Types of Reactions Review

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MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Two Reactants and One Product

Decomposition

Synthesis

Combustion

Single Replacement

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

CxHy +O₂--> H₂O + CO₂

Decomposition

Double replacement

Combustion

Single Replacement

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

One reactant into several products.

Decomposition

Synthesis

Combustion

Single Replacement

Tags

NGSS.HS-PS1-7

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

One element in the same activity series replaces another in a compound.

Synthesis

Combustion

Single Replacement

Double Replacement

Tags

NGSS.HS-PS1-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does (aq) mean in a chemical reaction?

silver

aqualirious

aqueous

Tags

NGSS.MS-PS1-4

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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

Synthesis

Decomposition

Single Replacement

Double Replacement

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Si + S₈ --> Si₂S₄

Synthesis (combination)

Decomposition

Single replacement

Double replacement

Tags

NGSS.HS-PS1-2

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Unit 05 - Balancing Equations and Types of Reactions Review

Two Reactants and One Product

CxHy +O₂--> H₂O + CO₂

One reactant into several products.

One element in the same activity series replaces another in a compound.

What does (aq) mean in a chemical reaction?

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

Si + S₈ --> Si₂S₄

KOH + H₃PO₄ --> K₃PO₄+H₂O

Pb(NO₃)₂ --> PbO + NO₂ + O₂

Balance this equation...
H₂ + Cl₂ --> HCl

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Unit 05 - Balancing Equations and Types of Reactions Review

Two Reactants and One Product

CxHy +O2 --> H2O + CO2

One reactant into several products.

One element in the same activity series replaces another in a compound.

What does (aq) mean in a chemical reaction?

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

Si + S8 --> Si2S4

KOH + H3PO4 --> K3PO4 + H2O

Pb(NO3)2 --> PbO + NO2 + O2

Balance this equation...H2 + Cl2 --> HCl

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CxHy +O₂--> H₂O + CO₂

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

Si + S₈ --> Si₂S₄

KOH + H₃PO₄ --> K₃PO₄+H₂O

Pb(NO₃)₂ --> PbO + NO₂ + O₂

Balance this equation...
H₂ + Cl₂ --> HCl