Mrs. Wurtz

Regular Chemistry

2nd, 4th, 5th Period

Coronapacalypse Week 4 Assignments

Preferred turn in procedure!!!

Please turn your work in directly to me via text to 936-552-1015

Pics of Completed work are due by midnight on April 20th

Make sure your name and class period show on EACH pic

1. Read the turn in instructions on the cover page.

2. Watch the instructional videos as I share them with you on Google Drive or on our YouTube channel

at the links provided. Take notes as you go. Text me if you have questions.

3. Complete the Assignments on the paper provided or on notebook paper.

4. Write your name on EVERY page of your assignments! Please!

5. Take pics of each page and TEXT to turn in to 936-552-1015

YouTube Channel Links:

Video 1: Synthesis and Decomposition Lecture https://www.youtube.com/watch?v=NWURj4Nod3Q

Since we will not be able to do the labs that accompany this content, the following two videos are short

and show you what the reactions would have looked like.

Video 2: Watch the synthesis of Magnesium oxide https://www.youtube.com/watch?v=kx72te_jAfw

Video 3: Watch the decomposition of Hydrogen peroxide

https://www.youtube.com/watch?v=_Utc0d_-PxI

Chemical Reaction Types

There are six main types of chemical reactions. Please learn the basic definition and form for each. In the

videos that accompany this note guide, I will show you how to predict the products for each type of reaction

given the reactants.

A SYNTHESIS REACTION is one in which several elements or small compounds are combined into one

complex product. They follow the general form:

A + B → C

For the scope of our class, the synthesis reactions you will encounter will combine simple reactants and form

products that are easy to predict. My favorite chemistry professor at OU, Dr. Lehr, always told us to be

thankful for easy synthesis reactions but to be aware that the real world would never turn out this way.

“Life is hard,” he would say, “but you’ll be a better person for it!”

A DECOMPOSITION REACTION is one in which a large compound breaks down into several smaller

compounds or elements. They follow the general form:

C → A + B

A COMBUSTION (of a hydrocarbon) REACTION is one in which a compound containing carbon and hydrogen

burns in the presence of oxygen to for water vapor and carbon dioxide.

CnHn + O2 → CO2 + H2O

A SINGLE DISPLACEMENT REACTION is one in which a pure element takes the place of a similar but less

reactive element in a compound. In many cases a metal will take the place of another metal or hydrogen in

an ionic compound. They follow the general form:

A + BC → B + AC

A DOUBLE DISPLACEMENT REACTION is one in which the cations of two ionic compounds switch places.

These reactions are also sometimes called PRECIPITATION REACTIONS because many double displacement

reactions form precipitates. They follow the general form:

AB + CD → CB + AD

An ACID-BASE REACTION is a special double displacement reaction in which an acid and a base react to form

a salt and water. They are also sometimes called neutralization reactions and most follow the general form:

HA + BOH → BA + H2O

Name ____________________________________________ Period _____

Synthesis and Decomposition Reactions Set

1. Write the chemical equation from the word equations below as I demonstrated in the notes and in the video.

2. Balance each reaction showing any work in the space provided.

3. Indicate in the box if the reaction is a synthesis (S) or a decomposition (D) reaction.

Assignment 1:

1. Hydrogen gas reacts with nitrogen gas to produce ammonia.

2. Calcium carbonate, CaCO3, breaks down to form calcium oxide and carbon dioxide.

3. Aluminum metal reacts with Bromine to form an ionic compound.

Assignment 2:

1. Mercuric oxide, HgO, breaks down into two elemental products.

2. Hydrogen and oxygen gases react to form water.

3. Chromium metal and oxygen gas react to form Chromium III oxide, Cr2O3.

Assignment 3:

1. Sodium metal reacts with iodine to form an ionic compound.

2. Aluminum oxide breaks down into two elemental products.

3. Sulfuric acid, H2SO4, breaks down to form hydrogen gas and sulfur trioxide