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Explain gravimetric analysis
Essay of gravimetric analysis
Essay of gravimetric analysis
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Recommended: Explain gravimetric analysis
Gravimetric analysis is used to determine the amount of a substance or element through its mass. To find the amount of sulfate in an unknown sample, gravimetric analysis is introduced and applied to a precipitate of BaSO4 produced from a chemical reaction involving the unknown sample and barium. However, the results of this experiment differed from the true value of sulfate in the unknown sample. While the true value is around 42% of sulfate, experiment shows that there was 43-47% of sulfate instead which may be due to the coprecipitation of other salts. Introduction Sulfates are commonly used in a variety of industries and in products that the average person utilizes daily, such as shampoo or clothing. While sulfates aren’t necessarily harmful, This error in the data may be from the coprecipitation of other salts that were in the unknown sample in addition to human error. The standard deviation of the experiment’s data is also very high. The fact that each of the three trials produced different results could be from additional weight from any filter paper that did not fully combust. However, with that thought in mind, the data shows that it is possible to use gravimetric analysis to figure out how much sulfate was in the original composition. This method, when done correctly, is useful to industries who use sulfates in order to keep the concentration of the sulfate low. While the data is not completely accurate because of error, it is possible to duplicate this experiment. With more time and finer equipment, the experiment will be able to run more smoothly and precise. Along with an adjustment to the experiment to prevent the coprecipitation of any other salts that were included in the unknown sample, this experiment will be able to produce more accurate results about the percentage of sulfate. The results produced from experiments involving gravimetric analysis are useful in not only determining how much sulfate is in a sample, but also in determining the amount of any other chemical in a certain
The purpose for this lab was to use aluminum from a soda can to form a chemical compound known as hydrated potassium aluminum sulfate. In the lab aluminum waste were dissolved in KOH or potassium sulfide to form a complex alum. The solution was then filtered through gravity filtration to remove any solid material. 25 mLs of sulfuric acid was then added while gently boiling the solution resulting in crystals forming after cooling in an ice bath. The product was then collected and filter through vacuum filtration. Lastly, crystals were collected and weighed on a scale.
The mixture was poured through a weight filter paper and Sucrose washed with a 5ml of dichloromethane. The resulting solid was left in a breaker to dry for one week, to be measured. Left it in the drawer to dry out for a week and weighted it to find the sucrose amount recovered amount.
We were assigned a group and instructed to measure the amount of different ions in that particular fertilizer sample by counting to preform tests. We used the formula SO4 + Agent —> Percipitat + others. Our job was to add 0.25 g of a fertilizer sample to 100 mL of water to dissolve, then add the agent Pb(NO2)3 to the water also, then filter and dry the water, and distinguish the mass. The was accomplished by using the % formula Mass SO4 = Mass Pb(NO3)2 x MW Pb(NO3)2/ MWPb(NO3)2 to gain the percentage, the the formula Mass SO4/MW SO4 =
One of the best methods for determining mass in chemistry is gravimetric analysis (Lab Handout). It is essentially using the the mass of the product to figure out the original mass that we are looking for. Thus the purpose of our experiment was to compare the final mass in our reaction to the initial mass and determine the change in mass.
In this experiment, there were several objectives. First, this lab was designed to determine the difference, if any, between the densities of Coke and Diet Coke. It was designed to evaluate the accuracy and precision of several lab equipment measurements. This lab was also designed to be an introduction to the LabQuest Data and the Logger Pro data analysis database. Random, systematic, and gross errors are errors made during experiments that can have significant effects to the results. Random errors do not really have a specific cause, but still causes a few of the measurements to either be a little high or a little low. Systematic errors occur when there are limitations or mistakes on lab equipment or lab procedures. These kinds of errors cause measurements to be either be always high or always low. The last kind of error is gross errors. Gross errors occur when machines or equipment fail completely. However, gross errors usually occur due to a personal mistake. For this experiment, the number of significant figures is very important and depends on the equipment being used. When using the volumetric pipette and burette, the measurements are rounded to the hundredth place while in a graduated cylinder, it is rounded to the tenth place.
Aim: The aim of this experiment was to determine the empirical formula of magnesium oxide.
Sulfur is found in the cells of all living organisms and plays a critical role in the oxygenation and detoxification of all cells. It is one of the basic building blocks used throughout the body to make a variety of chemicals such as enzymes, collagen, amino acids, hormones, neurotransmitters, and much more.
The use of force is a heated topic among many people. What is the “Use of Force Continuum”? It is the level of force an officer can use when arresting or subduing a suspect. According to Hicks (2004), “It is considered morally reprehensible for an officer or a sovereign agent to use excessive force without due necessity. However, once the need arises for a proper escalation of force, both the doctrinal theses of just war and the use of force continuum provide for a proper and morally principled use of necessary force” (pg. 255). The use of force continuum was created to guide officers so they are less likely to use excessive force. The officer is expected to use more force than the suspect, but no so that it is deemed excessive. According to Lyman
One possible source of experimental error could be not having a solid measurement of magnesium hydroxide nor citric acid. This is because we were told to measure out between 5.6g-5.8g for magnesium hydroxide and 14g-21g for citric acid. If accuracy measures how closely a measured value is to the accepted value and or true value, then accuracy may not have been an aspect that was achieved in this lab. Therefore, not having a solid precise measurement and accurate measurement was another source of experimental error.
In the epic Beowulf, the malevolent Grendel is terrorizing Hrothgar’s men as he reigns over their land for twelve years. He is a creature that is feared by all and is very unforgiving. The way Grendel goes about his life, the way he kills people without remorse is inhumane. But with this knowledge we have of Grendel as a monster, the question arises of what really defines the monster. Society’s idea of a monster ranges anywhere from animals of a greater strength than humans, to beings with deformities that cause them to look ‘abnormal’. All ideas of a monster come down to one basic idea; they are entities that provoke fear. Grendel fits this archetype well, as he is a symbol of the Dane’s fear of an “evil”, overpowering, invading force in their kingdom.
The Effect of Salt Solution Concentration On The Mass Of Potatoes Introduction = == == == ==
Porter five forces analysis is a framework for industry analysis and business strategy development. It inducements upon industrial organization economics to develop five forces that determine the competitive intensity and therefore attractiveness of a market. Attractiveness in this context refers to the overall industry profitability. An unattractive industry is one in which the combination of these five forces acts to drive down overall profitability. A very unattractive industry would be one approaching pure competition, in which available profits for all firms are driven to normal profit. This analysis is associated with its principal innovator Michael E. Porter presently at Harvard University as of 2014.
The Effects of Gravity There are some people who worry when they're outside, if they don't keep a good grip on the ground, they'll just go flinging off into space. They needn't really worry. about this, because gravity generally keeps that sort of thing from happening. The thing is, no one is really sure what causes gravity, but the effects have been studied by many. physicists and astronomers of the world.
The filtration experiment was vital to observe the way different sizes of particles diffuse or filter. The charcoal, which consisted of large particles, did not filter through, while the copper sulfate, which was very small in size, dissolved in the water (solvent) and diffused completely. Size is a major component to take into consideration when thinking about diffusion or
There is also the potential of human error within this experiment for example finding the meniscus is important to get an accurate amount using the graduated pipettes and burettes. There is a possibility that at one point in the experiment a chemical was measured inaccurately affecting the results. To resolve this, the experiment should have been repeated three times.