Is it a reaction or is it not? This is a difficult question to sometimes answer. This weeks' blog is all about chemical reaction around the home. What are things that happen in the kitchen, outside, etc. that are a chemical reaction and what are the observations that tell us they are? For a double hard question (and more points), what are those things that appear to be reactions, but really aren't
Ray Cuero
2/25/2014 06:35:36 am
Some reactions in the kitchen would be:
Mr. Casey
2/25/2014 07:44:33 am
AWESOME start Ray!!!! Now, describe the characteristics and, if you can, describe what is happening to the actual substances. i.e. how are molecules changing?
Ben Cook
3/2/2014 02:21:51 am
Some common chemical reactions are:
Kyler urata
3/2/2014 03:58:32 am
a simple example of a decomposition (chemical) reaction is water (H2O) breaking down into hydrogen (H2) and oxygen (O2)
Jennifer Smith
3/2/2014 07:07:38 am
When you burn Charcoal on the grill. It reacts carbon with oxygen to form carbon dioxide. C + O2 ----> CO2
Jesse Rowley
3/2/2014 12:45:41 pm
a couple of chemical changes around a home and outside are making coffee, getting a sunburn , and removing stains with bleach. all of these things cannot be reversed.all of these have there property's change. i think something that appears to be a chemical change would be a really hot shower and the water turns into steam or melting ice.
robby kusy
3/3/2014 11:54:39 am
One chemical reaction is when you add yeast into dough it causes the sugars to convert into carbon dioxide which makes bubbles or air pockets in the dough. This makes the dough rise.
Chance Thomas
3/4/2014 08:58:51 am
Fire: if you were to light something on fire like wood for fire what happened to the the wood and what happened to the fire? The answer in the fire and the wood changes to ashes because of the chemical reaction.
Robbie Schmitt
3/4/2014 12:33:58 pm
Ray said the best example of reactions, baking a cake, but there are many other reactions around the house like cooking an egg in the morning. The eggs yoke will be cooked or scrambled so you can eat it . And it cannot be reversed. Something that appears to be a reaction is water being frozen .people think it turns into ice but when it gets melted it is still water. This is a chemical change.
Mr. Casey
3/4/2014 09:58:28 pm
Okay, now lets turn our attention to nature. What are some natural events that would be considered a chemical reaction? Think land, sea, and air. 3/6/2014 07:31:06 am
When you combine water, carbon dioxide, and calcium carbonate, it creates stalactites and stalagmites. The equation looks like this: H20 + CO2 + CaCO3 = Ca (HCO3)2. Rain water takes the dissolved calcite from the rocks and drips down to make stalactites which is a chemical reaction found in nature.
Kayla Slinkard
3/5/2014 10:13:17 am
Well there are many reactions in nature some bigger than others, but one is when a flower blooms or blossoms. It starts out as a seed small and brown, then slowly grows from a little seed to a long green stem which eventually will bloom into a flower of any color. It also has a change in scent. Instead of smelling of roots or dirt, it has an elegant somewhat enjoyable scent. The flower eventually dies off again at one point though just to begin the cycle again. There are 2 changes, change in color and change in odor
Mr. Casey
3/5/2014 11:20:10 pm
What a good post. Life is teaming with chemical reactions. Can anyone come up with another?
Kayla Slinkard
3/6/2014 09:57:25 am
Oops. Scratch the first one. Some good examples of chemical reactions are rusting, decomposition, natural fires they are all chemical reactions. Rusting is a chemical reaction because when iron rusts it reacts with the oxygen in the air or water around it. The atoms are the same they are just placed differently. Fire is also a chemical change, it basically self lights itself though. In many cases in very hot temperatures when dead and browned plants have completely dried out it can cause a fire to strike. It will continue to burn as long as there is oxygen around and some sort of fuel, since it heats around any fuel it continually gives out gases. Decomposition, my last example, is also a chemical change because it breaks down into elements it was formed from, Such as food, it no longer smells or looks the same as it did before it was broken down. All of these examples are surely chemical changes in nature.
Ray cuero
3/6/2014 06:51:58 am
Cooking is also chemical changes in the food. When you cook your food it changes texture and taste. Baking powder haves sodium and hydrogencarbonate. The heat makes it break down and releasing dioxide that helps cake mixture rise while cooking.
Richie
3/6/2014 11:06:49 am
Something like the milk lab we did when u add chocolate syrup to the milk it sinks changes the color and texture and the the taste
Mr. Casey
3/7/2014 02:05:58 am
OKAY! OKAY! When did you all get smart?! MOst of this is really good, but there are still a few errors. Instead of adding new material, look at each others work and look for the errors I mentioned.
Kara Brown
3/26/2014 08:58:07 am
Some chemical reactions would be: 3/27/2014 06:45:01 am
Chemical reaction: cooking, baking, burning fire wood, trees respiring. Not chemical reaction: your room temperature change when your not there, boiling water
Mr. casey
3/28/2014 02:49:09 am
This is an old blog so not worth as much, but how do you know a chemical reaction is occuring, or not? Comments are closed.
|
This blog is for you...Feel free to share some curious train of thought you have, as well as share your thoughts on others. Archives
June 2014
Categories |