Friday, September 30, 2011
Chemistry sept. 30
Today we finished the vocab quiz and got signed up for this system with your cell phone. You sign up by texting the code to the number. In class we used this by texting either a letter or a number according to the question on the overhead. The questions were all about whether the things asked about were intensive or extensive. One question during class was, is density intensive or extensive? Since it does not matter how much it is, the answer was intensive. Intensive is where the amount is independent and doesn't matter, while extensive is dependent on the amount, such as mass. All of the questions using this style of learning were either intensive or extensive.
Wednesday, September 28, 2011
In class today we finished the blog about the chemistry in a bag. we also have a quiz tomorrow in class over vocab. we wrote a lab in class about chemical reactions the lab contain questions about how it got cold and hot. It also had questions about what happened in the lab. remember that questions are on Mrs. Sorensen's website along with vocab practice games.
Chemistry in a Bag
Procedure:
First we put the 1 scoop of both dry solutions into the bag. Calcium Chloride and Baking Soda (Sodium Bicarbonate) were put into one corner of the bag and sealed off. In the other corner we put one pipette of phenol red and sealed it off. We had to seperate them so they wouldn't interact before we sealed off the bag. Then we took all the air out of the bag and sealed it. Next we untwisted it and let them interact. We then observed the three chemicals as they went from their own forms of white powder and red liquid to a warm,orange color. We continued to watch as the bag began to fill up with gas and turned yellow in color. Slowly the calcium chloride and the baking soda began to dissolve and seemed to evaporate. The bag didn't explode but it did have a pillow-like structure. Next we tested some different chemicals such as phenol red with calcium chloride. We found out that when the substance becomes warm, it is because of the calcium chloride. Calcium chloride, when mixed with a liquid, turns very warm which is like the rock salt we use when the roads get icy. The phenol red when mixed with water stays a red color. Mix the two solid forms with the liquids, and the bag will fill up with gas, become warm and turn an orange-yellow color with a gassy, rotten egg odor.
1. Calcium chloride causes the temperature to turn to warm.
2. The controlled experiment without calcium chloride did not have a temperature change.
3. In the overall reaction the color changed to a orange color. In the controlled experiments we could don't find what caused the color to change.
4. The temperature changed before the gas bubbles formed.
5. All experiments required a liquid for a reaction to occur.
6. Gas is the new substance formed when all chemicals are mixed in the bag. Chemicals responsible are both the solids and water.
7. An experiment that could be tested is adding different amounts of water to see if calcium chloride's physical identity change occurs.
8. A temperature change doesn't always indicate a chemical reaction because you could see a color change or a physical change.
First we put the 1 scoop of both dry solutions into the bag. Calcium Chloride and Baking Soda (Sodium Bicarbonate) were put into one corner of the bag and sealed off. In the other corner we put one pipette of phenol red and sealed it off. We had to seperate them so they wouldn't interact before we sealed off the bag. Then we took all the air out of the bag and sealed it. Next we untwisted it and let them interact. We then observed the three chemicals as they went from their own forms of white powder and red liquid to a warm,orange color. We continued to watch as the bag began to fill up with gas and turned yellow in color. Slowly the calcium chloride and the baking soda began to dissolve and seemed to evaporate. The bag didn't explode but it did have a pillow-like structure. Next we tested some different chemicals such as phenol red with calcium chloride. We found out that when the substance becomes warm, it is because of the calcium chloride. Calcium chloride, when mixed with a liquid, turns very warm which is like the rock salt we use when the roads get icy. The phenol red when mixed with water stays a red color. Mix the two solid forms with the liquids, and the bag will fill up with gas, become warm and turn an orange-yellow color with a gassy, rotten egg odor.
1. Calcium chloride causes the temperature to turn to warm.
2. The controlled experiment without calcium chloride did not have a temperature change.
3. In the overall reaction the color changed to a orange color. In the controlled experiments we could don't find what caused the color to change.
4. The temperature changed before the gas bubbles formed.
5. All experiments required a liquid for a reaction to occur.
6. Gas is the new substance formed when all chemicals are mixed in the bag. Chemicals responsible are both the solids and water.
7. An experiment that could be tested is adding different amounts of water to see if calcium chloride's physical identity change occurs.
8. A temperature change doesn't always indicate a chemical reaction because you could see a color change or a physical change.
Chemistry in a bag
1) answer: The calcium chloride and phenol red seem to be the most reason behind the chemical reactions.
2) answer: most of the time with the sodium bicarbonate the temperature was lower. But with the calcium chloride the temperature usually got warmer.
3) answer: mostly the color changed to a pink color because if the phenol red. But when the baking soda was added with the phenol red and calcium chloride and baking soda the color changed to pink then yellow then orange.
4) answer: not necessarily. Sometimes the temperature change occurs before the color change. Only by a few seconds, though.
5) answer: all of our experiments were composed with fluid of some sort. Whether it was water or phenol red. It seems to be necessary for the experiment to react correctly.
6) answer: the combination of chemicals that we used in our experiment usually created a new temperature and a new color. Not always a new smell. But throughout the observations I have concluded that a new substance is made through each experiment.
7) answer: maybe mixing the chemical with water would change it a different color.
8) answer: because if there wasn't a retain of any kind then it wouldn't change anything. Temperature is a change. So if it changes temperature then there is a retain going on.
2) answer: most of the time with the sodium bicarbonate the temperature was lower. But with the calcium chloride the temperature usually got warmer.
3) answer: mostly the color changed to a pink color because if the phenol red. But when the baking soda was added with the phenol red and calcium chloride and baking soda the color changed to pink then yellow then orange.
4) answer: not necessarily. Sometimes the temperature change occurs before the color change. Only by a few seconds, though.
5) answer: all of our experiments were composed with fluid of some sort. Whether it was water or phenol red. It seems to be necessary for the experiment to react correctly.
6) answer: the combination of chemicals that we used in our experiment usually created a new temperature and a new color. Not always a new smell. But throughout the observations I have concluded that a new substance is made through each experiment.
7) answer: maybe mixing the chemical with water would change it a different color.
8) answer: because if there wasn't a retain of any kind then it wouldn't change anything. Temperature is a change. So if it changes temperature then there is a retain going on.
we put one spoon full of baking soda and calcium chloride in one side of the bag and tied it off from the other corner with the pipette of phenol red then we shook and mixed them well. it turned yellow and it was bubbly and foamy and it was cold and the bag popped because it filled up with air and it smelled like rubbing alcohol.
1. baking soda and phenol red made it cold
2.calcium chloride and phenol red made it hot
3.orange. what made the color change was the calcium chloride and the baking soda and phenol red made it turn orange.
4.the temperature started to change right when the chemical touch the color change a little bit after that.
5. All of the experiments required a liquid for a reaction to occur in the bag.
6. Gas is the new substance formed when all chemicals are mixed in the bag. Chemicals responsible are both the solids and water.
7. An experiment that could be tested is to add different amounts of water to see if calcium chloride's looks would change.
8. A temperature isn't the only change that indicate a chemical reaction because their is also the physical change and the smell.
1. baking soda and phenol red made it cold
2.calcium chloride and phenol red made it hot
3.orange. what made the color change was the calcium chloride and the baking soda and phenol red made it turn orange.
4.the temperature started to change right when the chemical touch the color change a little bit after that.
5. All of the experiments required a liquid for a reaction to occur in the bag.
6. Gas is the new substance formed when all chemicals are mixed in the bag. Chemicals responsible are both the solids and water.
7. An experiment that could be tested is to add different amounts of water to see if calcium chloride's looks would change.
8. A temperature isn't the only change that indicate a chemical reaction because their is also the physical change and the smell.
we put one scoop of calcium chloride into the baggie with one pippett of fennel red and mixed them together by shaking the baggie. It started to get cold because of the calcium chloride. It smelled like rubbing alcohol. It was also hot pink.
Next was sodium bicarbonate and fennel red into the baggie and mixed them together by shaking the baggie together as well. The baggie turned very hot because of the sodium bicarbonate. It was also hot pink and smelled like rubbing alcohol.
Questions:
1. Calcium chloride with fennel red and sodium bicarbonate with fennel red.
2. Because calcium chloride turns hot
3. It turned hot pink an orange-yellow color. Yes, because we mixed calcium chloride/sodium bicarbonate with fennel red. The white made the red color lighter.
4. No, because they both have slower chemical reaction.
5. No, without water there was no chemical reaction.
6. sodium bicarbonate and then calcium chloride and fennel red and water.
7. We put calcium chloride in a bag with water.
8. Yes because the temp. changed, but then no because other possible chemical reactions and then such as gas bubbles.
Next was sodium bicarbonate and fennel red into the baggie and mixed them together by shaking the baggie together as well. The baggie turned very hot because of the sodium bicarbonate. It was also hot pink and smelled like rubbing alcohol.
Questions:
1. Calcium chloride with fennel red and sodium bicarbonate with fennel red.
2. Because calcium chloride turns hot
3. It turned hot pink an orange-yellow color. Yes, because we mixed calcium chloride/sodium bicarbonate with fennel red. The white made the red color lighter.
4. No, because they both have slower chemical reaction.
5. No, without water there was no chemical reaction.
6. sodium bicarbonate and then calcium chloride and fennel red and water.
7. We put calcium chloride in a bag with water.
8. Yes because the temp. changed, but then no because other possible chemical reactions and then such as gas bubbles.
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