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Thursday, April 9, 2015
Chemical Reactions
What were some of the products in today's reactions? Was your hypothesis support or not support by your observations? Which reactions were exothermic? Was does that mean?
Some of the products in today's experiment were that in #1 that it started to bubble and turn white. That was because of the CO2 in the mixture. My hypothesis was a sort of correct. It was sort of correct because in experiment #2 I said it would have some gas and the warming indicated the gas. I believe that exothermic means salt water or turns whitish. The #1 was exothermic because the chemical reaction made it turn whitish and turn to salt water. Olivia G.
Some of the products from the mixtures were carbon dioxide, water, calcium, and a change in temp. My hypothesis was supported for cups #1 and #3. They were supported because I thought that the mixtures would fizz and bubble but on #2 I didn't know that nothing would happen! There were 2 mixtures that were exothermic and they were cups #1 and #2. Exothermic is when something heats up or rises in temperature. -Savannah :)
Some of the products in today's reaction were citric acid, baking soda, and calcium chloride. My hypothesis was supported by my observations. Cup 1 was exothermic. Exothermic means accompanied by the release of heat. -Sanjana
The first cup bubbled. The second cup got hotter. The third cup bubbled and got colder. My hypothesis was supported for the first reaction only. The second chemical reaction was exothermic. Exothermic means heat coming out of something. Allen
The first cup bubbled with foam and after the liquid looked like milk. The second cup got hot on the bottom from a chemical reaction. The third cup bubbled with foam and got colder. Also the first cups bubbles were smaller than the third cups bubbles.
The first cup released gas. It produced carbon dioxide, water, and salt. It also got warmer and more white. The second cup got warmer on the bottom and released gas. The calcium chloride stayed on the bottom for this chemical reaction. The third cup got released gas and got colder. My third hypothesis was the only supported hypothesis.cup 1 and 2 were exothermic. Exothermic means to give out heat.
The products were fizzling in #1, nothing in #2, and fizzling in #3. My hypothesis was not supported for any of them. 1 and 3 were endothermic, which means absorbing heat to make the cup and chemical reaction hotter.
The fist cup bubbled because of the co2. My hypothysis was right. In the second cup, nothing happened and my hypothysis was right again. The third cup is the one my hypothysis was wrong. Cup one and three were exothermic which means when something goes in the air or when something heats up due to the temperature. -Deniz
They first one fizzed and the water was unclear. The second one got hotter and the calcium chloride stayed at the bottom. The 3rd bubbled and fizzed and got very cold. Exothermic means to give out heat when a reaction is happening.None of my hypothesis were correct but i sill learned from this lab. The first and second cup were Exothermic.
#1: the reactants fizzed and bubbled. #2: the calcium "disappeared". #3:the reactants fizzed and bubbled. The cup grew cold and had bits of water spewing out.
None of my hypothesis were supported although I did guess that #2 would fizz. #2 was unfortunately the only cup that DIDN'T fizz. Exothermic means to give out heat and one of the following: light, electricity, and sound. Both #1 and #2 were exothermic. -Zachary
Substance #1 (the water and calcium chloride and the baking soda) produced fizzing/bubbling and there also was a slight temperature change going up. The water also turned cloudy. Substance #2 (Calcium Chloride and citric acid) produced little gas bubbles. The bottom of the cup heated a lot and after a couple minutes the solution got clearer and the chloride started to sink to the bottom. Substance #3 (baking soda and Citric Acid) produced many bubbles, the solution got colder and almost everything dissolved after a couple minutes which made the solution clear up. For all solution none of my hypothesis supported the ending result! Solution #1 and #2 were exothermic because they warmed up. Exothermic means that something heats/warms up, Just like both solution did!!!!! :) -Avni Duda
Some of the products that were in today's reactions were, the change in temperature, the fizzy bubbles, and when cup1 turned white. By my observations, my hypothesis was kind of supported, for Cup1 and Cup2. For Cup3 my hypothesis was not supported. Cup2 was exothermic. Exothermic means the release of heat. -Alicia
Deeksha D. Some products were the color change, the leftover substances, carbon dioxide bubbles, and temperature change. My hypothesis was not supported, but was correct for Cup 1, when it fizzed. Cup 2 was exothermic, which means that something warms up or gets hot.
Some of the products in today's experiment were that in #1 that it started to bubble and turn white. That was because of the CO2 in the mixture. My hypothesis was a sort of correct. It was sort of correct because in experiment #2 I said it would have some gas and the warming indicated the gas. I believe that exothermic means salt water or turns whitish. The #1 was exothermic because the chemical reaction made it turn whitish and turn to salt water.
ReplyDeleteOlivia G.
Some of the products from the mixtures were carbon dioxide, water, calcium, and a change in temp. My hypothesis was supported for cups #1 and #3. They were supported because I thought that the mixtures would fizz and bubble but on #2 I didn't know that nothing would happen! There were 2 mixtures that were exothermic and they were cups #1 and #2. Exothermic is when something heats up or rises in temperature.
ReplyDelete-Savannah :)
Some of the products in today's reaction were citric acid, baking soda, and calcium chloride. My hypothesis was supported by my observations. Cup 1 was exothermic. Exothermic means accompanied by the release of heat.
ReplyDelete-Sanjana
The first cup bubbled. The second cup got hotter. The third cup bubbled and got colder. My hypothesis was supported for the first reaction only. The second chemical reaction was exothermic. Exothermic means heat coming out of something.
ReplyDeleteAllen
The first cup bubbled with foam and after the liquid looked like milk. The second cup got hot on the bottom from a chemical reaction. The third cup bubbled with foam and got colder. Also the first cups bubbles were smaller than the third cups bubbles.
ReplyDeleteBrock Chang
The first cup released gas. It produced carbon dioxide, water, and salt. It also got warmer and more white. The second cup got warmer on the bottom and released gas. The calcium chloride stayed on the bottom for this chemical reaction. The third cup got released gas and got colder. My third hypothesis was the only supported hypothesis.cup 1 and 2 were exothermic. Exothermic means to give out heat.
ReplyDeleteThe products were fizzling in #1, nothing in #2, and fizzling in #3. My hypothesis was not supported for any of them. 1 and 3 were endothermic, which means absorbing heat to make the cup and chemical reaction hotter.
ReplyDeleteAlex
The fist cup bubbled because of the co2. My hypothysis was right. In the second cup, nothing happened and my hypothysis was right again. The third cup is the one my hypothysis was wrong. Cup one and three were exothermic which means when something goes in the air or when something heats up due to the temperature.
ReplyDelete-Deniz
They first one fizzed and the water was unclear. The second one got hotter and the calcium chloride stayed at the bottom. The 3rd bubbled and fizzed and got very cold. Exothermic means to give out heat when a reaction is happening.None of my hypothesis were correct but i sill learned from this lab. The first and second cup were Exothermic.
ReplyDeletegaurav
#1: the reactants fizzed and bubbled.
ReplyDelete#2: the calcium "disappeared".
#3:the reactants fizzed and bubbled. The cup grew cold and had bits of water spewing out.
None of my hypothesis were supported although I did guess that #2 would fizz. #2 was unfortunately the only cup that DIDN'T fizz.
Exothermic means to give out heat and one of the following: light, electricity, and sound.
Both #1 and #2 were exothermic.
-Zachary
Substance #1 (the water and calcium chloride and the baking soda) produced fizzing/bubbling and there also was a slight temperature change going up. The water also turned cloudy. Substance #2 (Calcium Chloride and citric acid) produced little gas bubbles. The bottom of the cup heated a lot and after a couple minutes the solution got clearer and the chloride started to sink to the bottom. Substance #3 (baking soda and Citric Acid) produced many bubbles, the solution got colder and almost everything dissolved after a couple minutes which made the solution clear up. For all solution none of my hypothesis supported the ending result! Solution #1 and #2 were exothermic because they warmed up. Exothermic means that something heats/warms up, Just like both solution did!!!!! :)
ReplyDelete-Avni Duda
Some of the products that were in today's reactions were, the change in temperature, the fizzy bubbles, and when cup1 turned white. By my observations, my hypothesis was kind of supported, for Cup1 and Cup2. For Cup3 my hypothesis was not supported. Cup2 was exothermic. Exothermic means the release of heat.
ReplyDelete-Alicia
Deeksha D.
ReplyDeleteSome products were the color change, the leftover substances, carbon dioxide bubbles, and temperature change. My hypothesis was not supported, but was correct for Cup 1, when it fizzed. Cup 2 was exothermic, which means that something warms up or gets hot.