Reaction between iron and oxygen Appearance of steel wool after 20 minutes _____________________________________ Decomposition of hydrogen peroxide Appearance of potato and hydrogen peroxide...

 

Reaction between iron and oxygen

Appearance of steel wool after 20 minutes _____________________________________

Decomposition of hydrogen peroxide

Appearance of potato and hydrogen peroxide combination ________________________

Reaction between zinc and acetic acid

Appearance of penny in vinegar after 30 minutes ___________________________

Reaction between baking soda and vinegar

Description of what happened when the baking soda and vinegar were combined ________________________________________________________

Reaction between iron and oxygen

Write a balanced equation for the reaction between iron and oxygen.

Classify the reaction that occurred between the iron and oxygen. Apply this reaction to a real-world situation.

Decomposition of hydrogen peroxide

Write the balanced equation for the breakdown of hydrogen peroxide.

Write a balanced equation for another decomposition reaction.

Reaction between zinc and acetic acid

Write the balanced equation for the reaction between zinc and acetic acid.

Classify the reaction between zinc and acetic acid and explain, in general terms, what happens during this type of reaction.

Devise a general equation that represents this type of equation.

Reaction between baking soda and vinegar

Two types of reaction occur when baking soda and vinegar combine. The first is a double replacement reaction. Write a balanced equation for this reaction.

What type do you think the second reaction is? Why? 

Hydrochloric acid and calcium carbonate react in the same way that baking soda and vinegar do. Write equations for the two reactions that occur when these compounds react.

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t-nez | High School Teacher | (Level 3) Associate Educator

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Part I: Iron reacting with oxygen:

`4Fe + 3O_2 -> 2Fe_2O_3`

The type of reaction is synthesis or combination (which is a type of oxidation-reduction reaction). This product formed is commonly known as rust. Rusting of iron is a real-world situation in which this reaction occurs.

Part II: Hydrogen Peroxide

`2H_2O_2 -> 2H_2O + O_2`

The type of reaction is decomposition because two products are produced from one reactant. Decomposition reactions have one reactant and two or more products. This decomposition is sped up by an enzyme in the blood, so you can see oxygen bubbles form when you put hydrogen peroxide on cuts and scrapes.

Another decomposition reaction is that which happens when calcium carbonate is heated to produce calcium oxide:

`CaCO_3 -> CaO + CO_2`

This reaction is used to produce CaO.

Part III: Zinc and Acetic Acid:

`Zn + 2CH_3COOH -> H_2 + Zn(CH_3COO)_2`

This is an example of a single replacement (or single displacement) reaction in which hydrogen is displaced by zinc because zinc has a higher tendency to be oxidized. In general, when a metal (M) reacts with and acid (HA) hydrogen gas is produced along with an ionic compound:

 `2HA + M -> H_2 + 2MA`

Part IV: Baking Soda and Vinegar:

The first reaction shown is an acid-base neutralization, a type of double displacement:

`NaHCO_3 + CH_3COOH -> NaCH_3COO + H_2CO_3`

The next equation represents decomposition because two products are produced from one reactant:

`H_2CO_3 -> CO_2 + H_2O`

The last equation is the overall reaction:

`NaHCO_3 + CH_3COOH -> NaCH_3COO + CO_2 + H_2O`

Here are the similar equations for calcium carbonate reacting with hydrochloric acid:

Double displacement:

`2HCl + CaCO_3 -> H_2CO_3 + CaCl_2`

Decomposition:

`H_2CO_3 -> CO_2 + H_2O`

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