Types of Chemical Reactions

Types of Chemical Reactions

By Molly Cochran

When two or more substances combine to form a product

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A = any element

B = any element​

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Synthesis Reactions

Multiple Select

Identify ALL the Synthesis Reactions (Select all correct answers)

• $$2H_2\ +\ O_2\ \rightarrow\ 2H_2O$$  

• $$Se_3O_2\ \rightarrow\ 3Se\ +\ O_2$$  

• $$I_2\ +\ 3F_2\ \rightarrow\ 2IF_3$$  

•   $$ZnS\ +\ O_2\ \rightarrow\ ZnO\ +\ SO_2$$  

Multiple Choice

What synthesis reaction did the previous video involve?

• $$2H_2\ +\ O_2\ \rightarrow\ 2H_2O$$  

• $$H_2\ +\ S\ \rightarrow\ H_2S$$  

• $$H_2\ +\ 2N_2\ \rightarrow\ 2HN_2$$  

When one substance breaks down into two or more products

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Decomposition Reactions

Multiple Select

Identify ALL Decomposition Reactions (select all correct answers)

• $$Se_3O_2\ \rightarrow\ 3Se\ +\ O_2$$  

• $$I_2\ +\ 3F_2\ \rightarrow\ 2IF_3$$  

• $$CaS\ \rightarrow\ Ca\ +\ S$$  

• $$2NaBr\ \rightarrow\ 2Na\ +\ Br_2$$  

When one element replaces another in a compound. (If two elements trade places, that is a double replacement reaction)

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Single Replacement Reactions

Multiple Choice

Identify ALL Single Replacement Reactions (select all correct answers)

• $$2NaBr\ +\ Cl_2\ \rightarrow\ 2NaCl\ +\ Br_2$$  

• $$CaS\ \rightarrow\ Ca\ +\ S$$  

• $$Sr\left(NO_3\right)2\ +\ Be\left(SO_4\right)\ \rightarrow\ Be\left(NO_3\right)_2\ +\ Sr\left(SO_4\right)$$  

When two elements trade places

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Double Replacement Reactions

Multiple Choice

Identify ALL Double Replacement Reactions (select all correct answers)

• $$2NaBr\ +\ Cl_2\ \rightarrow\ 2NaCl\ +\ Br_2$$  

• $$Sr\left(NO_3\right)_2\ +\ Be\left(SO_4\right)\ \rightarrow\ Be\left(NO_3\right)_2\ +\ Sr\left(SO_4\right)$$  

• $$2H_2\ +\ O_2\ \rightarrow\ 2H_2O$$  

When a substance reacts with oxygen to product carbon dioxide and water

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Combustion Reactions

Multiple Select

Identify ALL Combustion Reactions (select all correct answers)

• $$ZnS\ +\ O_2\ \rightarrow\ ZnO\ +\ SO_2$$  

• $$Se_3O_2\ \rightarrow\ 3Se\ +\ O_2$$  

• $$2C_2H_6\ +\ 7O_2\ \rightarrow\ 4CO_2\ +\ 6H_2O$$  

• $$2C_3H_6\ +\ 9O_2\ \rightarrow\ 6CO_2\ +\ 6H_2O$$  

Multiple Choice

In the last story in the video, how did the person make the fire burn more?

• Adding fuel to the fire

• Lighting a match

• Letting more oxygen in by opening the door

• Putting water on the flames