Overall, the goal of this laboratory experiment was to determine the percent by mass of accuracy. Solved Experiment 5 Report Sheet Percent Water in a Hydrated - Chegg Percent by Mass of Volatile Water in Hydrated Salt= 44% Show your work *Calculation of standard deviation and SRSD. Calculate the moles of anhydrous (dry) KAl(SO 4 ) 2 that were present in the sample. What is the empirical formula of the copper sulfate hydrate? Chemistry 1300 water in a hydrated salt. Explain. To begin the experiment, a sample of the hydrated salt is weighed using a balance. The percent water in the hydrated salt will be too high because the contamination will add more mass creating a larger gap between the initial measurement of the hydrated salt and the final measurement of the anhydrous salt. then again, measure the mass of the remaining salt. Laboratory Manual for the Principles of General Chemistry, 10th Edition. heptahydrate is 43%, there was some error that occurred during this experiment which can be Leads the team in developing experimental procedures, Leads the team in analyzing the data and the experimental error, Responsible for writing the presentation of the proposal, Delivers the presentation to te instructor/TA and the rest of the class, First five items from yoursupplies list for this lab. (%H 2 O), Relative standard deviation of %H 2 O in Average % H 2 O = (43 + 42 + 43) / 3 = 43%, Discussion Trial one was calculated accordingly, following the procedure, whereas the second trial was We hypothesized that if the salt was heated multiple times, the mass would decrease The purpose of this experiment was to learn how to handle laboratory apparatus by Copyright 2023 StudeerSnel B.V., Keizersgracht 424, 1016 GC Amsterdam, KVK: 56829787, BTW: NL852321363B01, Date Experiment was Performed: September 1, 2020. also learning how to handle laboratory apparatus. Mass of crucible, lid, and anhydrous salt 1st mass measurement) 2nd mass measurement () 40.203 41.558 40.513 40.119 41.448 40.405 40.119 41.448 40.405 3rd mass measurement (3) 5. Leads the team in developing the theoretical foundations of the science behind the experiment. Using a test tube holder, grasp the test tube containing the hydrate and heat over a Bunsen burner flamewhileholdingthe test tube at a 45angle. the ions that heat removes them). Conclusion Forced the salt experiment lab report percent water in textbooks and lid. hypothesis was that if the salt was heated multiple times, the mass would decrease as ions of the salt and are referred to as waters of crystallization (Beran 85). Students will determine the ratio between the moles of water lost and the moles of anhydrous salt and write the chemical formula of the hydrate sample. (Mass of water lost / Mass of hydrated salt) * 100 = Percent by mass of volatile water in A.2. hydrated salt. by learning how to properly use different laboratory apparatus like tongs, Bunsen burners, and Lab 2: Determine the Percentage of Water in a Hydrate: The goal of this experiment is to learn how to properly calculate the ratio of salt to water, in a hydrated salt, and to calculate the percentage of water (by mass) within a hydrated salt. Thank you! weighed once more and calculations were made in order to find the percent of water lost from Record your observations below. repeat this to ensure accuracy. hydrated salt (%RSD), Mass of test tube and hydrated salt (g) Mass of test tube (g) = Mass of hydrated salt (g). Experts are tested by Chegg as specialists in their subject area. Experiment 5: Percent of Water in a Hydrate Lab Report, To determine the percent by mass of water in a hydrated salt, To learn to handle laboratory apparatus without touching it, A hydrate is a crystalline solid that traps water as part of its crystal structure. When the crucible is cool and safe to touch, weigh on an analytical balance. Pearson Record exact mass. Cross), The Methodology of the Social Sciences (Max Weber), Laboratory Manual For Principles Of General Chemistry - 10th Edition (dragged), EXP 9 and 10 Volumetric and Vinegar Analysis Lab Report.docx, Summary Chemistry: A Molecular Approach Ch. Mass of water lost (g 4, Percent by mass of volatile water in hydrated salt (%) Data Analysis, B Average percent H2O in hydrated salt (%H2O) Data Analysis, C * 6 Standard deviation of%H,0 Data Analysis, D 7, Relative standard deviation of % H2O in hydrated salt (%RSD) Show calculations on next page. It is important to carefully control the temperature and time of the drying and rehydration processes in order to ensure accurate results. The purpose of experiment five was to calculate the percent of H, hydrated salt. Percent of Water in a Hydrate Lab Report.docx - Experiment 5: Percent Experiment 5: Percent Water in a Hydrated Salt. Hydrates contain water molecules in their crystalline structure these molecules can be removed by heat. Average percent H-O in hydrated salt (%,0) Data Analysis, 6. After gentle heating for about 5 minutes, increase the heat applied tothe crucible, lid,and sampleuntil the bottom of the crucible turns red. The mass of the anhydrous salt is final mass, measurement of the heated hydrated salt minus the mass of the fired lid and crucible. Most salts in nature are hydrated, in which the water molecules are, chemically bounded to the ions of the salt as a part of their structure (Beran 85). removed some of the water molecules of the hydrated salt to form an anhydrous salt. Experiment 5 Report Sheet Percent Water in a Hydrated Salt Lab Sec. Trial Thial1 Trial 2 1. Mass of crucible,lidand sample (after final heating): To ensure complete dehydrationof sample, reheat the crucible, lid, and sample as in step #5, exceptto heat it for 5 minutes. Transfera small amount of solid copper(II) sulfate pentahydrate, CuSO45H2O, that just fills the bottom of a clean, dry 150-mm (medium size)test tube. Objective The objective of this lab is to determine the percent by mass of water in a hydrated salt while also learning how to handle laboratory apparatus. show the decrease in mass as our salt was being heated multiple times. Adriana Cerbo Chemistry 1300 Lab Section D Tuesday 3:00-5:45PM Instructor Name: Daniel de Lill Date Experiment was Performed: September 1, 2020. Will the percent 2. weighed again, and the test tube was then heated for 5 minutes. Section 2: Safety Precautions and Waste Disposal. Record your observations. This hypothesis was accepted based on the fact that our Mass of water lost (g) 4. Describe the error that has occurred; that is, is the mass of the anhydrous salt remaining in the crucible reported as being too high or too low? We hypothesized that if the salt was heated multiple times, the mass would decrease as A hot crucible will break if placed directly on a cold surface. salt (g), Percent by mass of volatile water in That Salt being El One must then Mass of Water Loss (g)= 0 0 This material has bothoriginal contributions, and contentbuilt upon prior contributions of the LibreTexts Community and other resources,including but not limited to: 3: Experiment 3 - Hydrated Salt is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts. Hydrated salts that spontaneously lose water molecules to the atmosphere are. To complete this experiment, one would measure the mass of water in B. When the denominator of the fraction is bigger, the answer (percent of water) will decrease. This means that it will seem like that there was more sample was lost than it actually had, therefore making the reported mass of the anhydrous salt too low. Let the crucible cool for 5 to 10minutes. Once the oil is burned off the bottom of the crucible, it will make it seem like the sample has lost more water than it truly has. B. Obtain an unknown hydrate from your instructor. The main objective of this experiment was to use gravimetric analysis to determine the Because during the cooling of the fired crucible, water vapor condensed on the We reviewed their content and use your feedback to keep the quality high. following thermal decomposition of the hydrated salt in Part B. Salts are compounds composed of a metal ion plus a non-metal or polyatomic ion, e. Subsequently, in Part B. After cooling the crucible, lid, and anhydrous salt, they were taken to the scale to be weighed. water through evaporation from heating the hydrated salt sample using laboratory apparatus such Legal. A hydrate contains a definite number of water molecules bound to each ionic compound oranhydrous salt. Experiment 5: Percent Water in a Hydrated Salt, The purpose of this experiment was to determine the percent by mass of water in a, hydrated salt. Digication ePortfolio :: General Chemistry (Alexander Antonopoulos) by Alexander P. Antonopoulos at Salve Regina University. Percent by Mass of Volatile Water in Hydrated Salt= [0] (100) There was an error in calculating the mass of the crucible. The mass of water evaporated is obtained by subtracting the mass of the anhydrous solid from the mass of the original hydrate (\ref{3}): \[m_{\ce{H2O}} = m_{\text{Hydrate}} - m_{\text{Anhydrous Solid}} \label{3}\]. -Nama Desk No nown n Trial I Triat 2 Trial 3 Mis of fired crueible and lid ce) 35.500 2sGs crucible, lid, and hydrated salt g) 2. salt, mass of water lost, percent by mass of volatile water in hydrated salt, average Instructor Name: Daniel de Lill \[x = \frac{n_{\ce{H2O}}}{n_{\text{Anhydrous Solid}}} \label{6}\], DO NOT perform any lab work outside of the stated lab hours. Mass of test tube and hydrated salt (g) 91 g 46 44. Many water molecules are chemically bound to the ions of salt in its crystalline Observe each sample occasionally as you perform the rest of this experiment. 4. reading are complete, just need questions 4 to 7 completed. Before experimenting, one This percentage can be determined through a series of steps, including drying the salt, weighing it, and then rehydrating it with a known volume of water. the salt in its crystalline structure), and a anhydrous salt (water molecules are so weakly bound to percent water in a hydrated salt lab report experiment 5 1-8, Role of the Advanced Practice Nurse (NSG 5000), Concepts Of Maternal-Child Nursing And Families (NUR 4130), Primary Concepts Of Adult Nursing II (NUR 4110), Assessing Impact on Student Learning (D093), Human Anatomy And Physiology I (BIOL 2031), Introduction to International Business (INT113), Critical Thinking In Everyday Life (HUM 115), Professional Application in Service Learning I (LDR-461), Advanced Anatomy & Physiology for Health Professions (NUR 4904), Principles Of Environmental Science (ENV 100), Operating Systems 2 (proctored course) (CS 3307), Comparative Programming Languages (CS 4402), Business Core Capstone: An Integrated Application (D083), Chapter 1 - BANA 2081 - Lecture notes 1,2, Ch. Trial 1 Trial 2 Trial 3, Only need ONE example of each type of calculation, 91 g - 90 g = 1 g Since the, professor instructed to stop weighing after the mass of the anhydrous salt was less than 0.01, grams in change, this second measurement resulted in the final mass for both of the trials, performed in this experiment. Experiment 5: Percent Water in a Hydrated Salt, Adriana Cerbo One of these laboratory materials being t, One must be able to handle the crucible properly with the use of tongs specifically after, then again, measure the mass of the remaining salt. A hydrated salt sample was then placed in the test tube and the test tube was weighed again. Date of Experiment: SUMMARY 5 PTS Please write short introduction for the experiment. Copyright 2023 StudeerSnel B.V., Keizersgracht 424, 1016 GC Amsterdam, KVK: 56829787, BTW: NL852321363B01, percent by mass of water in a hydrated salt as well as to learn how to properly handle certain, laboratory materials without touching it. Whatchanges did you see? You should contact him if you have any concerns. 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Will the reported percent of water in the hydrated salt be too high, too low, or unaffected? C. Excited electrons do. the percent water in the hydrated salt be reported as being too high, too low, or In extension, the percentage of water in the hydrated copper II sulfate compound was 32. Would your calculated percent water in the hydrate be high, low, or unaffected? Upon completion of the lab, the results Course Hero is not sponsored or endorsed by any college or university. analysis, to determine the percent by mass of water in a hydrated salt. without heat, lose water molecules to the atmosphere), deliquescent (salts that readily absorb Use of eye protection is recommended for all experimental procedures. Responsible for ensuring that all team members are present and actively participating according to their roles. water molecules, and then again, measure the mass of the remaining salt.
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