This brief post is focused on a 3rd type of chemical reaction, Single Replacement. November’s end of month blog posts focus on five types of chemical reactions, Synthesis, Decomposition, Single Replacement, Double Replacement, and Combustion of a Hydrocarbon.
Objectives:
1. Predict the products of a Single Replacement reaction.
2. Use a chemical Activity Series to determine if a chemical reaction will occur.
3. Balance a chemical equation.
This type of chemical reaction was also discussed briefly in the 01/11/2014 blog post titled “New Schedule".
In a Single Replacement Reaction an element and a compound react to form another element and compound. The Activity Series indicates what elements are more active to replace an element and take its place in a compound.
Here is a webpage showing one example:
http://www.grandinetti.org/activity-series
Elements higher on the list will replace elements lower on the list. This list is a collection of the observations over years.
For example, copper is higher on the list than silver, so will exchange places as shown in the 01/11/2014 blog post.
The reaction is:
Cu (s) + AgNO3 (aq) --> Ag (s) + CuNO3 (aq)
Another example is zinc metal with hydrochloric acid producing hydrogen gas and zinc chloride:
Zn (s) + HCl (aq) à H2 (g) + ZnCl2 (aq)
The balanced reaction is:
Zn (s) + 2 HCl (aq) à H2 (g) + ZnCl2 (aq)
Here’s a demonstration using a balloon to capture the gas:
Objectives:
1. Predict the products of a Single Replacement reaction.
2. Use a chemical Activity Series to determine if a chemical reaction will occur.
3. Balance a chemical equation.
This type of chemical reaction was also discussed briefly in the 01/11/2014 blog post titled “New Schedule".
In a Single Replacement Reaction an element and a compound react to form another element and compound. The Activity Series indicates what elements are more active to replace an element and take its place in a compound.
Here is a webpage showing one example:
http://www.grandinetti.org/activity-series
Elements higher on the list will replace elements lower on the list. This list is a collection of the observations over years.
For example, copper is higher on the list than silver, so will exchange places as shown in the 01/11/2014 blog post.
The reaction is:
Cu (s) + AgNO3 (aq) --> Ag (s) + CuNO3 (aq)
Another example is zinc metal with hydrochloric acid producing hydrogen gas and zinc chloride:
Zn (s) + HCl (aq) à H2 (g) + ZnCl2 (aq)
The balanced reaction is:
Zn (s) + 2 HCl (aq) à H2 (g) + ZnCl2 (aq)
Here’s a demonstration using a balloon to capture the gas:
The zinc metal is placed in the balloon and 3M or 6M hydrochloric acid is placed in the Erlenmeyer flask.
Here is a worksheet on Single Replacement reactions w/ answers:
http://www.sciencegeek.net/Chemistry/chempdfs/EquationsWorksheet4.pdf
You may have to aid your students with some chemical formulas.
I will try to have two more short posts through the end of the month of November to address the other types of reactions. I hope to have this done before Thanksgiving (11/27)!
Check out the Topic List to help you to find past Blog entries. I hope it helps!
The holidays approach -- you can purchase my lab book "Chemistry on a Budget" (or ask for it as a gift) -- it is available for $20 at amazon.com or $23 at lulu.com. It will take a few weeks to get to you, so order now!
http://www.amazon.com/Chemistry-Budget-Marjorie-R-Heesemann/dp/0578129159/ref=sr_1_1?s=books&ie=UTF8&qid=1389410170&sr=1-1&keywords=chemistry+on+a+budget
http://www.lulu.com/shop/marjorie-r-heesemann/chemistry-on-a-budget/paperback/product-21217600.html
This book contains 13 labs using consumable materials purchased from local stores. There are two versions of each lab, one with a ten-question conclusion and one with directions for a full lab report. This way the teacher has the option! Each lab is two pages to allow for one two-sided handout.
Have a good weekend!
Here is a worksheet on Single Replacement reactions w/ answers:
http://www.sciencegeek.net/Chemistry/chempdfs/EquationsWorksheet4.pdf
You may have to aid your students with some chemical formulas.
I will try to have two more short posts through the end of the month of November to address the other types of reactions. I hope to have this done before Thanksgiving (11/27)!
Check out the Topic List to help you to find past Blog entries. I hope it helps!
The holidays approach -- you can purchase my lab book "Chemistry on a Budget" (or ask for it as a gift) -- it is available for $20 at amazon.com or $23 at lulu.com. It will take a few weeks to get to you, so order now!
http://www.amazon.com/Chemistry-Budget-Marjorie-R-Heesemann/dp/0578129159/ref=sr_1_1?s=books&ie=UTF8&qid=1389410170&sr=1-1&keywords=chemistry+on+a+budget
http://www.lulu.com/shop/marjorie-r-heesemann/chemistry-on-a-budget/paperback/product-21217600.html
This book contains 13 labs using consumable materials purchased from local stores. There are two versions of each lab, one with a ten-question conclusion and one with directions for a full lab report. This way the teacher has the option! Each lab is two pages to allow for one two-sided handout.
Have a good weekend!
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