ONLINE TEST
MYTH BUSTERS EXPERIMENT AND REPORT RESOURCES
Khan Academy Lesson: Diffusion and Osmosis
Crash Course Cellular Membranes & Transport
how_to_write_an_introduction_section.pdf | |
File Size: | 350 kb |
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Introduction
The purpose of this experiment was to figure out the percent mass of NaHCO3 in an effervescent tablet. This was done by observing dissociation reactions and measuring change in mass in order to determine how much sodium bicarbonate rea. Knowledge of limiting reactants and stoichiometry will be applied in order to make conclusions and identify trends.
An effervescent tablet consists of sodium bicarbonate (NaHCO3), citric acid (C6H8O7), and acetylsalicylic acid (C9H8O4), this is commonly known as aspirin. The purpose of this lab is to determine how much sodium bicarbonate is in an antacid tablet, this is known as the percent composition. Sodium bicarbonate is a basic substance and citric acid is acidic. These two chemicals react with one another when dropped in water and an acid-base reaction takes place. An acid is a molecule that can donate a proton or accept an electron pair. Hydrogen is basically a proton. An acid-base reaction is a chemical reaction that neutralizes the properties of the acid and the base. The hydrogen from the acid combines with the hydroxide of the base and forms water. This is known as dissociation. It is this reaction that causes the effervescence to occur because when sodium bicarbonate and citric acid react, water and carbon dioxide are formed.
The law of Conservation of Mass can be applied to determine the amount of sodium carbonate in the tablet. By measuring the mass lost through the release of carbon dioxide gas, the amount of sodium carbonate in the tablet can be calculated once the sodium carbonate is made the limiting reactant. A limiting reactant is the chemical that is completely used up in a chemical reaction. The limiting reactant can be determined by calculating the molar ratio of the chemicals involved in the reaction, which is the number of moles of each chemical present. When the experiment starts, the vinegar (acetic acid) will be the limiting reactant and there will be excess sodium bicarbonate. As more vinegar is added, more CO2 gas will be released and the amount of sodium bicarbonate can be determined by measuring the change in mass. When no excess carbon dioxide is released, we will know that all the sodium bicarbonate has reacted. At this point the vinegar is in excess and the sodium bicarbonate is now the limiting reagent.
The purpose of this experiment was to figure out the percent mass of NaHCO3 in an effervescent tablet. This was done by observing dissociation reactions and measuring change in mass in order to determine how much sodium bicarbonate rea. Knowledge of limiting reactants and stoichiometry will be applied in order to make conclusions and identify trends.
An effervescent tablet consists of sodium bicarbonate (NaHCO3), citric acid (C6H8O7), and acetylsalicylic acid (C9H8O4), this is commonly known as aspirin. The purpose of this lab is to determine how much sodium bicarbonate is in an antacid tablet, this is known as the percent composition. Sodium bicarbonate is a basic substance and citric acid is acidic. These two chemicals react with one another when dropped in water and an acid-base reaction takes place. An acid is a molecule that can donate a proton or accept an electron pair. Hydrogen is basically a proton. An acid-base reaction is a chemical reaction that neutralizes the properties of the acid and the base. The hydrogen from the acid combines with the hydroxide of the base and forms water. This is known as dissociation. It is this reaction that causes the effervescence to occur because when sodium bicarbonate and citric acid react, water and carbon dioxide are formed.
The law of Conservation of Mass can be applied to determine the amount of sodium carbonate in the tablet. By measuring the mass lost through the release of carbon dioxide gas, the amount of sodium carbonate in the tablet can be calculated once the sodium carbonate is made the limiting reactant. A limiting reactant is the chemical that is completely used up in a chemical reaction. The limiting reactant can be determined by calculating the molar ratio of the chemicals involved in the reaction, which is the number of moles of each chemical present. When the experiment starts, the vinegar (acetic acid) will be the limiting reactant and there will be excess sodium bicarbonate. As more vinegar is added, more CO2 gas will be released and the amount of sodium bicarbonate can be determined by measuring the change in mass. When no excess carbon dioxide is released, we will know that all the sodium bicarbonate has reacted. At this point the vinegar is in excess and the sodium bicarbonate is now the limiting reagent.
CSI RESOURCES
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forensics_blood_alcohol.pdf | |
File Size: | 221 kb |
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Websites with info about casting
http://science.howstuffworks.com/impression-evidence2.htm
http://forensicsciencecentral.co.uk/impressions.shtml
http://www.crime-scene-investigator.net/footwear.html
Blood Spatter
http://www.crime-scene-investigator.net/SimplifiedGuideBloodstainPatterns.pdf
http://www.iabpa.org/journal
http://www.bmi.gv.at/cms/BMI_SIAK/4/2/1/ie2012/files/Brodbeck_IE_2012.pdf
Analysis of Skeletal Remains (Forensic Anthropology)
http://prezi.com/g7rx_2fvqmp_/forensic-anthropology-height-estimation/
Analysis of Skeletal Remains
Forensic Entomology
http://www.slideshare.net/Nagwa2012/forensic-entomology-past-present-and-the-future
Trajectory of a Bullet
Trajectory Analysis
Magic Bullet
Ballistics
Media Options
- Collage - Photograph (taken by you)
- Painting - Pencil Drawing
- Gel Transfer - Poetry/ song lyrics
- Photoshop - Political Cartoon
Music to Help Inspire
- Bob Dylan: The Times They Are A Changin'
- Bob Dylane: Hurricane
- Bob Marley: Redemption Song
- Dave Matthews: Cry Freedom
- Cyndi Lauper: True Colors
- Garth Brooks: We Shall Be Free
Others: http://www.jamforjustice.org/the-experience/songs-for-justice/
http://science.howstuffworks.com/impression-evidence2.htm
http://forensicsciencecentral.co.uk/impressions.shtml
http://www.crime-scene-investigator.net/footwear.html
Blood Spatter
http://www.crime-scene-investigator.net/SimplifiedGuideBloodstainPatterns.pdf
http://www.iabpa.org/journal
http://www.bmi.gv.at/cms/BMI_SIAK/4/2/1/ie2012/files/Brodbeck_IE_2012.pdf
Analysis of Skeletal Remains (Forensic Anthropology)
http://prezi.com/g7rx_2fvqmp_/forensic-anthropology-height-estimation/
Analysis of Skeletal Remains
Forensic Entomology
http://www.slideshare.net/Nagwa2012/forensic-entomology-past-present-and-the-future
Trajectory of a Bullet
Trajectory Analysis
Magic Bullet
Ballistics
Media Options
- Collage - Photograph (taken by you)
- Painting - Pencil Drawing
- Gel Transfer - Poetry/ song lyrics
- Photoshop - Political Cartoon
Music to Help Inspire
- Bob Dylan: The Times They Are A Changin'
- Bob Dylane: Hurricane
- Bob Marley: Redemption Song
- Dave Matthews: Cry Freedom
- Cyndi Lauper: True Colors
- Garth Brooks: We Shall Be Free
Others: http://www.jamforjustice.org/the-experience/songs-for-justice/