Chemical Reactions: Types.1

Multiple Choice

Which part of a chemical equation indicates the number of molecules involved in the reaction?

• Coefficient

• Subscript

• Chemical Formula

• Yield

​write this down

Multiple Choice

Which of the following is NOT a type of chemical reaction listed previously?

• Synthesis reaction

• Decomposition reaction

• Neutralization reaction

• Combustion reaction

​write this down

Multiple Select

Select all the correct statements about synthesis reactions.

• They always produce a single product.

• They involve two or more reactants.

• They can only occur with elements, not compounds.

• They are also known as combination reactions.

Open Ended

Explain the difference between a synthesis reaction and a decomposition reaction, using examples if possible.

​Synthesis of NaCl

Multiple Choice

Which of the following best represents the synthesis of sodium chloride?

• 2Na(s) + Cl2(g) → 2NaCl(s)

• NaCl(s) → Na(s) + Cl2(g)

• 2NaCl(s) + O2(g) → 2Na2O(s) + Cl2(g)

• Na(s) + Cl2(g) → NaCl2(s)

​write this down

​write this down

Multiple Choice

Which of the following best describes a decomposition reaction?

• A reaction in which two elements combine to form a compound.

• A reaction in which a single compound breaks down into two or more elements or new compounds.

• A reaction in which two compounds exchange ions.

• A reaction in which an element displaces another from a compound.

Multiple Choice

Based on the experiment shown, what energy source is being used to initiate the decomposition reaction?

• Electricity

• Light

• Heat

• Sound

Open Ended

Explain the process of decomposition of copper carbonate as shown in the diagram. What are the products formed?

Multiple Choice

Which of the following are possible products when a metal carbonate undergoes decomposition?

• Metal oxide and carbon dioxide

• Metal and oxygen

• Metal hydroxide and water

• Metal oxide and water

​write this down

​write this down

Open Ended

Compare and contrast decomposition reactions and single displacement reactions. Provide an example of each.

Multiple Choice

Which metal is the most reactive according to the activity series shown?

• Lithium

• Potassium

• Calcium

• Aluminum

Multiple Choice

Which of the following statements about the thermite reaction is correct?

• Aluminum displaces iron from iron(III) oxide because it is more reactive.

• Iron displaces aluminum from aluminum oxide because it is more reactive.

• Iron(III) oxide is reduced to iron by magnesium.

• Aluminum is less reactive than iron.

Open Ended

Explain how the activity series of metals helps predict the outcome of the thermite reaction demonstrated in the experiment.

Open Ended

How confident do you feel about identifying the different parts of a chemical equation after this lesson?

Multiple Choice

What is the role of the coefficient (number that comes before the formula) in a chemical equation?

• It shows the number of molecules or atoms involved in the reaction.

• It indicates the type of chemical reaction.

• It represents the yield of the reaction.

• It identifies the subscript in the formula.

Multiple Choice

Which of the following models best demonstrates a balanced chemical equation?

• F
• G
• H
• J

Multiple Choice

What is the left part of a chemical equation called?
H_{2 +} O → H₂O

• Reactants
• Products 
• Yields 
• Chemical Equation 

Multiple Choice

Pb(NO₃)₂ --> PbO + NO₂ + O₂

• Synthesis (combination)
• Decomposition
• Single replacement
• Combustion

Multiple Choice

Based on the activity series, will this reaction occur?

Ni + HCl →

• Yes

• No

Multiple Choice

A displacement (single replacement) reaction will occur when...

• a more reactive metal displaces a less reactive metal from its compound.
• A less reactive metal displaces a more reactive metal from its compound
• Displacement only occurs when two of the same metals are reacted 
• Displacement reactions will only occur in metals above iron in the reactivity series

Multiple Choice

Without balancing the final equation, predict the products for the synthesis reaction:  $$Li\ +\ Cl_2\ \rightarrow$$  ?

• $$LiCl_2$$  

• $$LiCl_{ }$$  

• $$Li_2Cl_2$$  

• $$Li_2Cl_{ }$$  

Multiple Choice

Without balancing the final equation, predict the products for the synthesis reaction:  $$Li\ +\ Cl_2\ \rightarrow$$  ?

• $$LiCl_2$$  

• $$LiCl_{ }$$  

• $$Li_2Cl_2$$  

• $$Li_2Cl_{ }$$  

Multiple Choice

How many products are in a synthesis reaction?

• there are never any products

• only one product

• there are seven products