Tuesday, December 6, 2011
Monday, November 21, 2011
Thursday, October 13, 2011
Monday, October 3, 2011
Flame Test Lab #4
FBI Investigators,
My partner and I, here at the Geauga County Crime Lab, have come to the conclusion that all of the unknown substances found at the scene are in fact metal salts. We have compared these four found substances to our 7 known metal salt solutions. After much careful observation, we have come to the conclusion that substance A is Lithium (Li), B is Potassium (K), C is Calcium (Ca), and D is Strontium (Sr). Due to the fact that substance A showed a red/violet color, just as LiNO3 did, we came to the conclusion that it was Lithium. Likewise, since B showed a indigo/orange/violet color just as KCl had, we decided that it must be Potassium. Since C was an extremely bright orange color, we have decided that it is most likely Calcium (like in CaCl2). Lastly, we have come to the conclusion that substance D is Strontium due to it's bright red color, just as the color produced by SrCl2. We hope that this information will aid you in your investigation.
-Jamie Hoddinott, Geauga County Crime Lab Member
My partner and I, here at the Geauga County Crime Lab, have come to the conclusion that all of the unknown substances found at the scene are in fact metal salts. We have compared these four found substances to our 7 known metal salt solutions. After much careful observation, we have come to the conclusion that substance A is Lithium (Li), B is Potassium (K), C is Calcium (Ca), and D is Strontium (Sr). Due to the fact that substance A showed a red/violet color, just as LiNO3 did, we came to the conclusion that it was Lithium. Likewise, since B showed a indigo/orange/violet color just as KCl had, we decided that it must be Potassium. Since C was an extremely bright orange color, we have decided that it is most likely Calcium (like in CaCl2). Lastly, we have come to the conclusion that substance D is Strontium due to it's bright red color, just as the color produced by SrCl2. We hope that this information will aid you in your investigation.
-Jamie Hoddinott, Geauga County Crime Lab Member
Monday, September 19, 2011
Thursday, September 15, 2011
Essential Questions Ch 1, 2, 3
1) In order to measure quantities, Scientists must first answer the questions "What do I know for sure?" and "What can I estimate?". After a scientist has determined what measures they know for sure, they may estimate one final digit. This estimated digit is called the "uncertain".
2) One may estimate their error in measurement by finding the percent error. In order to find the percent error, one must have the actual (or theoretical) value. To find the percent error, you must subtract the theoretical value from the experiment value. After you have done this, you must divide it by the theoretical value. After this value is found, one must multiply it by 100 for it to be a percentage. This value is the percent of error.
2) One may estimate their error in measurement by finding the percent error. In order to find the percent error, one must have the actual (or theoretical) value. To find the percent error, you must subtract the theoretical value from the experiment value. After you have done this, you must divide it by the theoretical value. After this value is found, one must multiply it by 100 for it to be a percentage. This value is the percent of error.
Tuesday, August 16, 2011
Highlight of My Summer
For as long as I can remember, my brother and I have been going to Camp Christopher towards the end our summer vacation. To my surprise, my parents had planned for us to go on my birthday weekend this year. I was kind of upset when I found out that I wouldn't be able to spend my birthday with friends from home, but I decided to just go with it. Throughout the week, my friends and I participated in many activities such as horseback riding, archery, zip-lining, and hiking. On the night of my birthday, my friends decided to plan a huge bonfire, and to go on a midnight hike as a cabin. It was such an amazing experience, and it was definitely a birthday that I will not soon forget.
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