copper sulfate hydrate lab sources of error

X is a specific whole number value. How do you feel in the morning when you wake up? Natural Gas Hydrates, Fourth Edition, provides a critical reference for engineers who are new to the field. The actual value of moles of water per copper sulfate is 5 moles and the percent composition of water in copper sulfate pentahydrate is 36.1% Variables: Independent Variable: Mass of crucible, cover and hydrated sample in grams Dependent Variable: Mass of water evolved in grams Data can be collected and most of it analyzed in a single 45-50 class period. Add highlights, virtual manipulatives, and more. A student trying to determine if a white solid is a true hydrate heats the sample and finds that there is evolution of water, that the residue obtained is soluble in water and that the solution is colorless. Honors Chemistry - You do not need to write three paragraphs for this conclusion. 7H 2 O) is a heptahydrate of magnesium sulfate: within one mole of magnesium sulfate heptahydrate are seven moles of water. 1 A student is given a cobalt (II) chloride hydrate. Pour the used nitric acid in the waste container provided. From this, we can calculate the ratio of salt to water (by calculating the molar and stoichiometric ratios), and the percentage of water (by mass) within the hydrated salt (by dividing the mass of the water, by the mass of the hydrated salt, then multiplying the resulting decimal by 100). Chem 1A 04 Lab 3 Hydrate Report - Studocu First, a pre-weighed sample of the unknown sulfate salt will be dissolved in water. C.7.A: The student is expected to name ionic compounds containing main gr, Lab: Determining the Composition of a HydrateFor students in Grades 8-12.INTRODUCTION:Hydrates are ionic compounds that have a number of water molecules attached as part of their structure. The five general types of chemical reactions are synthesis (also known as direct combination), decomposition, single replacement (also known as single displacement), double replacement (also known as double displacement), and combustion. * Watch glass So the practical involved taking hydrated copper sulphate, heating it to drive off the water, weighing before and after, and thus calculating the number of water molecules of crystallisation, based on the respective molecular weights of the anhydrous salt and water. We would call this copper sulfate pentahydrate. Send me a message, I'd love to hear from you! This water can be driven off by heat to form the anhydrous (dehydrated) ionic compound, magnesium sulfate. When you get this mass remember it includes the mass of the crucible so you need to subtract the mass of the crucible from the total mass. Placed crucible on mesh pad using tongs (from this point, the crucible was handled solely with tongs until the experiment concluded), and allowed to cool to room temperature. Iron (III) chloride. The reaction occurred and 2.4469 grams of solid copper, Cu, precipitated; therefore, showing that the limiting reagent was iron. Students will perform an experiment to find the hydrate formula. What did your group get as the formula of the hydrate? Rinse the crucible and its cover with distilled water. Hydrated Copper (II) Sulphate Experiment Report Where's my experimental error coming from? Rounding out with new case study examples, this new edition gives engineers an im, This PowerPoint is intended to introduce high school students formulas of hydrates. Paragraph #3: An error and how to fix it. ). |Score | What are the qualities of an accurate map? Use a minimum of 2 g. This will help to reduce errors due to small lab balance inaccuracies. 5,7% of error in a Hydrated Crystal lab, is it too high? The difference between 5.00 and 5.16 is a weight error of about 200mg, and I was really careful, so this seems unlikely. Students should know how to name ionic compounds (39-Naming Ionic Compounds) and how to convert from grams to moles (60-Mole Convers, Students learn about hydrates - the ionic compounds with water physically associated with them! PDF Chemistry Honors Lab - NJCTL . Abstract Name: Kamaal Thomas |Date: January 4, 2011 | |Graded Assignment Download the preview file to get a look! The reaction of Copper (II) Sulfate, CuSO4, mass of 7.0015g with 2.0095g Fe or iron powder produced a solid precipitate of copper while the solution remained the blue color. If the compound possesses all three of the above-mentioned properties, it is a true hydrate; if at least one of them is not present, the compound is not. After heating, the mass of the anhydrous compound is found to be 3.22 g. Determine the formula of the hydrate and then write out the name of the hydrate. Previous to an exposure to heat via the stove, it can be seen that the copper sulfate bear the natural form and colour of a bright blue crystal. ), Not all of the water may have evaporated during heating (Also unlikely, for the same reason as the one above. Kieran Sidebotham In this section we will determine the number of moles of water present per mole of anhydrous solid in a given hydrate. In this activity, I will construct an electroplating apparatus and observe the process of electroplating. Hence 0.267/0.0515 = 5.18mol water per mol copper sulphate. ALL of the Chemistry Labs you need for a WHOLE year!! By comparing the mass lost to the mass of anhydrous salt left behind, we can calculate the percentage of water within the hydrated salt. A larger effect is decomposing copper sulfate to copper oxide and sulfur trioxide. Send me a message, I'd love to hear from you! Mass a dry watch glass Add a small scoop of blue hydrate Mass the watch glass and hydrate Heat the hydrate on hot plate until all blue is gone Allow watch glass to cool Mass the watch glass and anhydrate . It is soluble. Another possibility would be to get more accurate equipment, to replicate the experiment within a dehumidified environment, and/or perform the experiment using a larger crucible (to reduce the possibility that spatter from the hydrated salt could leave the crucible). Gently heat the hydrate by moving the burner back and forth around the dish. * Pipet The purpose of this bundle is to offer a worksheet to cover every type of naming.Goes Well With My Other Nomenclature Worksheets.NomenclaturePossible Uses- Worksheet- Activity- Homework- Classwork- Test Review- Quiz ReviewFeedbackHave questions or feedback? You might also like these related lessons! Learn more about Stack Overflow the company, and our products. This means that the formula for hydrated copper sulfate is: The goal of this experiment is to determine the percentage of water (by mass) in a hydrate, and to calculate the ratio of salt to water in a hydrated salt. Heat the blue copper(II) sulfate until it has turned . The reason why this is a source of error is because as time passed between the measurements, the copper sulfate hydrate sample absorbed humidity (water) from the atmosphere and therefore increased its mass. Copper Sulfate absorbs water easily, forming a weak bond between the copper sulfate and five water molecules. This lab will go in your lab book. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. This document includes the pre-lab, procedure, data table, and analysis questions. October 3, 2017 Some hygroscopic substances, such as \(\ce{P2O5}\) and anhydrous \(\ce{CaCl2}\), are widely used to dry liquids and gases (see experiment on the Molecular Weight of \(\ce{CO2}\)); they are referred to as desiccants.

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