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We looked inside some of the posts by andriodaaboulchemistry-blog and here's what we found interesting.
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Both the acids and bases created a dramatic increase of color (the base turned yellow/green, the acids turned red/pink). The colors made a great looking spectrum.
This was a great overall lab and was very cool to see what colors would be produced. PH values are shown in the table.
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The popcorn experiment was a lot of fun and was cool popping the kernels
Measuring volume
Initial volume of water: 5 mL
Volume with popcorn (35 kernels) : 8.5 mL
Volume of popcorn: 3.5 mL
115.30 g = total mass before popping
113.70 g = total mass after popping
1.6 g g mass difference
1.6 g/35 kernels = 0.0457/18 g H2O = .0025 mole
3.5 ml -> .0035 mL
273 + 225 = 498 K
P= (.0025mole)(.0821 atmxL/molxK)(498K) / .0035 mL = 29 atm.
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In this experiment we made the mentos react with the diet coke to create a suppperrrr coool experiment. The reaction created carbon dioxide which created pressure that could make the diet coke shoot up like a rocket, or explode like a bomb if done well enough.
The pressure was used against the bottle to shoot up into the sky since gas has no set volume or mass.
Our experiment didn’t go super well, and to make it better in the future, you must make the coke bottle as closed/tight as possible to create a bigger explosion.
Overall this was one of my favorite experiments so far.
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1. In the 1g flask, the limiting reagent was the baking soda because as you can see, the baking soda has clearly dissolved itself in the vinegar, meaning that there was an excess amount of vinegar for the reaction. In the 2.5g it was also the baking soda, and in the 4g it was the flask due to there still being piles of baking soda at the bottom of the flask which meant not all of it was used because there wasn’t enough vinegar for it to react with.
2. If you have a limiting amount of a reactant than not all of the other substance will be able to react, therefore limiting the number of products you can get, and the size of the reaction.
3. The largest balloon was the 4g because there was the most products created and the largest reaction, which produced the most gas, which filled up the balloon the most.
4. The smallest balloon was the 1g because there was the smallest reaction which produced the least amount of gas which filled up the balloon the least when compared to the other reactions.
5. .5Fe+1.5o2 ----> .25Fe2O3
6. Finding the right balance for bread or cooking in general.
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(Sorry for the messy fridge in advance)
In this section of my fridge, you can see strawberries, yogurt, cheese, salad, butter, and jam.
The cheese in my fridge has potassium electrolytes, as well as calcium.
The salad in my fridge has sodium (from the salt thats in the dressing), the lettuce has potassium, and calcium in it.
The yogurt has potassium and magnesium electrolytes.
The butter has sodium and potassium
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The vinegar and salt-soaked cardboard acts as an electrolyte for the pennies, and helps conduct energy. Without these pieces of cardboard, the penny battery would not have worked like it did, and the light would not have lit up.
Because we shaved off the copper on one side of the pennies, the pennies acted as two different metals. The electrolyte, aka the cardboard with vinegar and salt on it, acts the electrolyte which used electrons causing an electric current into the light which lights it up. The amount of pennies used is around the bare minimum to light up this light. The more pennies used, the higher the voltage, and the more power it can use.
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I learned from this experiment that each element reacts differently in terms of how quickly, and how they react in general.
The main error of this experiment is that you can’t control the amount of metal which is used, which will make a difference of how fast it reacts.
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questions answered in the chart. READ HIGHLIGHTED TEXT (IMPORTANT INFORMATION)
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The curls represent the number of valence electrons while the fingers represent the protons. The fatness was electrons
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1. Each compound produced a different flame because they each reacted differently to the heat. If they were all the same compound they would’ve created the same color.
2. The color of the flame might give you an idea of the range of its atomic emission spectrum
3. After looking at what colors create what you can identify the compound. For example hydrogen produces purple light.
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1st picture: phone
2nd: sun
3rd: indoor classroom light
After looking at the three different light sources through the spectrometer, I noticed that all different sources had a different rgb spectrum. The main colors which I saw change were the colors blue and red. I believe that every light source will have a different spectrum in the spectrometer. It was a lot of fun creating and looking at different light sources.
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Dye-Separation Lab 3.3
1. The colors that are shown on the filter paper are red, blue, a little bit of yellow, and a little bit of green.
2. The colors of the ink have different densities, which let them travel farther than others. 3. Some colors of the classmates spread out further and some of their colors were more defined. Some traveled less.
rf values of red is 5/5.7 or 0.90
rf value of yellow is 5.6/5.7 or 0.98
rf value of blue is 5.7/5.7 or 1
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Dimensional Analysis
When reading about derived units, it teaches about how to change the measurements of things. This is pretty hard to get the hang of. A derived unit is a type of unit measurement. Also when watching the 9 Density tower video, I found how it looked really cool
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5 Things That Made an Impression on Me.
When reading about Chemistry on CK12, a couple things impressed/interested me. One thing which I never knew before was that chemistry seemed to have started with mainly learning about creating different types of gasses. As CK12 says, in the 1700′s chemistry started to move rapidly. I never knew that the main first forms of chemistry was with gases. Another thing that interested me was laughing gas. At the dentist, I have been put on laughing gas to get 4 of my teeth removed. I never really knew how old laughing gas really was, but apparently it goes all the way back to the 1700′s, which I find very interesting. It was even used for a tooth operation, just like it would be today. I also never knew that there were 5 main branches for the study of chemistry. These being physical chemistry, organic chemistry, inorganic chemistry, analytical chemistry, and biochemistry. The main branch I never heard of was analytical chemistry. Analytical chemistry focuses on figuring out the different components in samples of matter, and find out what something is made of. I had never heard about this before. One thing which I had never really thought about was how all things which are made are done through chemical reactions. Some examples from CK12 were the rubber tire, dynamite, and plastic. I never really thought about the chemical reactions which create many items and materials which I see all the time. Speaking of dynamite, the final thing which impressed me was that all the fortune made from dynamite which went to the creator of dynamite, was later used to fund the noble prizes.
#swag#money#2CoolForSchool#HugsNotDrugs#fantastic#MrWongShouldHitMeUpWithAnAInTheClass#chemistry#FanFavorite
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