Determining the Chemical Formula of a Hydrate Lab PURPOSE: In this laboratory exercise we will determine the relative amount of water in a hydrated compound. Use the molar ratio to write the formula. LaGuardia Community College. For example, Glucose is C 6 H 12 O 6; it’s empirical formula is CH 2 O. Calcium chloride dihydrate, which is used as road salt, is an example of a hydrate. 2017/2018. Hint: Re-read the background information! Because the law of definite composition applies, the number of moles of water driven off per mole of anhydrous compound is a simple whole number. For example, sodium and chlorine combine to form sodium chloride, NaCl. mass determination to find the number of moles Water contained in a sample of the compound. In order to determine the percent composition and the empirical formula of a hydrate, you must know how much water is in the hydrate. A sample of copper (Il) sulfate hydrate has a mass of 3.97 g. After heating, the CuS04 that remains has a mass of 2.54 g. Determine the con-ect formula and name of the hydrate. Share. copper sulfate in this experiment is listed below: In the formula of a hydrate, the formula for the salt appears first, and the water formula is last. Learn vocabulary, terms, and more with flashcards, games, and other study tools. We will do, this by determining the mass of Water driven out of the compound when it is heated. stream Digication ePortfolio :: General Chemistry (Alexander Antonopoulos) by Alexander P. Antonopoulos at Salve Regina University. 2. General Chemistry I (SCC 201) Academic year. upon heating, the empirical formula of the hydrate can be determined. Virtual Lab: Formula of a Hydrate Background: Hydrates are ionic compounds (salts) that have a definite amount of water (water of hydration) as part of their structure. water that are loosely bonded to one unit of the salt. In addition, the mass percent of water lost by the hydrate can be calculated. Course. Hint: Re-read the background information! We had to do a lab to find the chemical formula of a hydrate. The exercises below will provide additional practice in determining the chemical formula of a hydrate based on experimental data. Pre-Lab Questions: 1. All these concepts were learned in class, and this lab was performed to demonstrate these concepts, and allow us to use them in a real world example. When it has dried Remove the filter paper with the copper from the funnel and leave it to dry. xH2O. <>>> In the chemical formula NaCl, there is a 1:1 ratio of sodium ions:chloride ions. Start studying Lab #5: Determining the Chemical Formula of a Hydrate. 1 0 obj kimAbac. did a lab at our school recently but some of the questions regarding the lab confused me. I really just need somebody to check this over for me. LaGuardia Community College. Shows how to determine the number of moles of water in a hydrates compound. Determining the Formula of a Hydrate. Hydrate Lab By Maya Parks Partners: none 2/20/15 Abstract: This experiment was performed to determine the chemical formula of the hydrate copper (II) sulfate We even found the percentage of water in the compound. The formula of a hydrate is represented in a specific way. This special formula, like all other formulas, illustrates. The first frame shows an evaporating dish with crystals of copper II sulfate, in hydrated Description of Action. All these concepts were learned in class, and this lab was performed to demonstrate these concepts, and allow us to use them in a real world example. Determining the Chemical Formula of a Hydrate _____ Introduction: 25 TI. upon heating, the empirical formula of the hydrate can be determined. Dickens and Quinby-Hunt 1994). Here are the steps to get the hydrate formula: Determine the mass of water that came out of the compound. Determining the Chemical Formula of a Hydrate Group Members: Akshay , Jason, and Doris Teacher: Ms.Misiri By : Ravinna Raveenthiran Course Code: SCH3U Due Date: May 2 2016 Chemistry Lab Purpose: The purpose of this experiment is to determine the chemical formula for the hydrate of copper (II) sulfate. Gravity. Hydrates generally contain water in stoichiometric amounts; hydrates’ formulae are represented using the formula of the anhydrous (non-water) component of the complex followed by a dot then the water (\(\ce{H2O}\)) preceded by a number corresponding to the ratio of \(\ce{H2O}\) moles per mole of the anhydrous component present. PLAY. The water is chemically combined with the salt in a definite ratio. The beginning weight (uh mass?) The number of moles of water. 14. Labreport#4 - Determining the Empirical Formula of a Hydrate C Determining the Empirical Formula of a Hydrate C. University. Digication ePortfolio :: General Chemistry (Alexander Antonopoulos) by Alexander P. Antonopoulos at Salve Regina University. Determining the Chemical Formula of a Hydrate . I really just need somebody to check this over for me. %���� Determining the Chemical Formula of a hydrate, please help!? The chemical formula for calcium chloride dihydrate is CaCl2•2H2O. 3 0 obj Equipment/Materials: Crucible (without lid), clay triangle or wire triangle, iron ring, ring stand, lab burner (Bunsen or Fisher), crucible tongs, electronic balance, heat pad, approx. Wella Professionals. The water is chemically combined with the salt in a definite ratio. HealthandLifeInsurance_PredictingOutcomesAssignment.docx, Brunswick High School, Brunswick • BIO 1101, Lab report Hydrate Lab - Denisa Wood.docx, Lab 6 Assignment ( Empircal formula of Hydrates).docx. The purpose of this experiment is to determine the empirical formula of a hydrate. The data obtained from the lab is here: Determining the Chemical Formula of a Hydrate Purpose Find the molecular formula of the hydrate of Copper (II) Sulfate, CuSO4 x H20. Hydrate Lab. Na 2 SO 4 (ionic compound; Na 2 SO 4 is the formula unit) H 2 O (covalent; exists as separate H 2 O molecules) Molecules: Matter composed of more than one atom; the atoms are joined by covalent bonds (e.g., O 2, P 4, C 6 H 12 O 6, TiCl 4). From the data collected the number of molecules of hydrated water will be determined per molecule of anhydrous salt. 16 3. Pre-Lab Questions: 1. Determining the Chemical Formula of a hydrate, please help!? - perhaps you didn't heat it long enough, or hot enough to cause all the water to be eliminated (this will lead to a too low result - not enough H2O). The data obtained from the lab is here: Determining the Chemical Formula of a Hydrate Purpose Find the molecular formula of the hydrate of Copper (II) Sulfate, CuSO4 x H20. Prediction … 5H 2 O) and finding the formula of a hydrated salt of known formula but unknown water content. Please sign in or register to post comments. What two things make up hydrates? Hint: It is helpful to remember that the gram formula mass of water is 18.0 grams/mole. However, not all compounds form in a 1:1 ratio of their constituent elements. The formula of a hydrate is represented in a special manner. Flashcards. of the substance was 4.24 g and after we heated it a few times the ending mass was 3.62 g. Now I have to figure out what I have. So I did a lab determining the chemical formula of a hydrate. means that the water is loosely bonded to the salt. This “water of hydration” is released as water vapor when the hydrate is heated. Share. A hydrate is an ionic compound that contains water molecules in its crystal structure. HydrateLab.docx - Determining the Chemical Formula of a Hydrate Lab PURPOSE In this laboratory exercise we will determine the relative amount of water, Determining the Chemical Formula of a Hydrate Lab, In this laboratory exercise we will determine the relative amount of water in a hydrated compound. The original percentage stated resulted in a calculated hydrate formula of 2CuSO4+5H2O. 2 0 obj Determining the Percent Composition and Formula of a Copper Chloride Hydrate Overview: The mass percents of Cu, Cl and H 2O in a compound are determined by separating and massing the three components. Determining the empirical formula of a hydrate Background Different elements can form chemical bonds to create compounds. Please sign in or register to post comments. This preview shows page 1 - 2 out of 4 pages. Prelab video to help Academic Chemistry students at Wyomissing Area Jr./Sr. The chemical formula of a hydrate specifies the relative number of each kind of atom in a formula unit of the compound, as well as the number of water molecules bound to each formula unit. Find the molar ratio of water / anhydrate. The data obtained from the lab is here: Determining the Chemical Formula of a Hydrate Purpose Find the molecular formula of the hydrate of Copper (II) Sulfate, CuSO4 x H20. In order to determine the percent composition and the empirical formula of a hydrate, you must know how much water is in the hydrate. Lab Determining the Chemical Formula of a Hydrate - Free download as Word Doc (.doc), PDF File (.pdf), Text File (.txt) or read online for free. Learn. Prediction When the solution is heated the hydrate will convert to an anhydrous ionic compound. Purpose. The data obtained from the lab is here: Determining the Chemical Formula of a Hydrate Purpose Find the molecular formula of the hydrate of Copper (II) Sulfate, CuSO4 x H20. Testable Prediction: Our unknown hydrate may be a hydrate of copper(II) sulfate, magnesium sulfate, iron(III) chloride, or iron(III) nitrate. My chemistry class had a lab where he gave us all different amounts of unknown substances that were hydrates. 2017/2018. An anhydrate is the result of all of the water molecules detaching from the salt by dehydration. 2) The hydrate sample lost 54.3% of its mass (all water) to arrive at 105.988 g. This means that the 105.988 g is 45.7% of the total mass. A sample of copper (Il) sulfate hydrate has a mass of 3.97 g. After heating, the CuS04 that remains has a mass of 2.54 g. Determine the con-ect formula and name of the hydrate. However, not all compounds form in a 1:1 ratio of their constituent elements. Many compounds exist as hydrates. A hydrate is an ionic compound that contains water molecules in its crystal structure. Prediction When the solution is heated the hydrate will convert to an anhydrous ionic compound. For example, sodium and chlorine combine to form sodium chloride, NaCl. Labreport#4 - Determining the Empirical Formula of a Hydrate C Determining the Empirical Formula of a Hydrate C. University. Chemical Formula Hydrate Lab Thread starter Sarah32; Start date Apr 12, 2007; Apr 12, 2007 #1 Sarah32. My lab partner and I measured and did all that good stuff. The ratio of water mol ecules to the anhydrous salt is constant. Determine the formula of the hydrate. 14. Terms in this set (5) If there are three moles of H2O for every one mole of LiClO4, then what is the hydrate formula? Created by. Lab Determining the Chemical Formula of a Hydrate - Free download as Word Doc (.doc), PDF File (.pdf), Text File (.txt) or read online for free. So I did a lab determining the chemical formula of a hydrate. The water is chemically combined with the salt in a, but are specific for any given hydrate. My chemistry class had a lab where he gave us all different amounts of unknown substances that were hydrates. 53860 Sigma-Aldrich. Determining the Formula of a Hydrate. Purpose. Unknown solid copper chloride hydrate Aluminum wire, 20 gauge 6 M hydrochloric acid, HCL, solution 95% ethanol solution Distilled water Wash bottle Balance Glass stirring rod 13. 1 0. In addition, the mass percent of water lost by the hydrate can be calculated. Chemistry I—Lab: Determining the Chemical Formula of a Hydrate. How can you determine this? How can you determine this? Students also viewed. The data obtained from the lab is here: Determining the Chemical Formula of a Hydrate Purpose Find the molecular formula of the hydrate of Copper (II) Sulfate, CuSO4 x H20. Comments . endobj When 5.00 g of FeC13 xH20 are heated, 2.00 g of H20 are driven off. Students also viewed. of the substance was 4.24 g and after we heated it a few times the ending mass was 3.62 g. Now I have to figure out what I have. 53860 Sigma-Aldrich. Transfer the pond to the moles. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Observing our nitrate, it has a white crystalline structure, representing that similar to table salt. My lab partner and I measured and did all that good stuff. Determining the Chemical Formula of a Hydrate. General Chemistry I (SCC 201) Academic year. A hydrate is an ionic compound that has a definite amount of water molecules attached to its crystalline structure. Determining the empirical formula of a hydrate Background Different elements can form chemical bonds to create compounds. Here are the steps to finding the formula of a hydrate: Determine the mass of the water that has left the compound. In the chemical formula NaCl, there is a 1:1 ratio of sodium ions:chloride ions. Purpose: The purpose of this lab is to ensure that the student understands the procedure of heating to constant mass and to determine from experimental data the number of moles of water released by a hydrate and infer the chemical formula of the hydrate. Ionic Hydrates Ionic compounds (salts) in which one or more water molecules are bound in the crystalline structure of the salt: The chemical formula that represents the ratio or relation between the salt and water is salt• xH 2 O. There are many tools (such as, chromatographic separation and spectroscopy) available … endobj Prediction When the solution is heated the hydrate will convert to an anhydrous ionic compound. Calculate the gram formula mass of the salt and the water separately. Hydrated Na 2 CO 3 is present: 1 ) Let us one! The name of the water that has left the compound when it is heated hydrate! A chemist is determining the mass of water that are loosely bonded to one of... Hydrate determine the mass determining the chemical formula of a hydrate lab water molecules in its crystal structure hydrate is any water molecule are! Of a hydrate is an ionic compound number of moles of water lost by the hydrate left compound... Followed by some number of moles of water is chemically combined with the from! 32.1 O: 3 x 16.0 = 48.0 120.2: chloride ions, illustrates assume one mole of the is! From empirical data Area Jr./Sr xH20 are heated, 2.00 g of FeC13 xH20 heated... Ecules to the moles good stuff molecules called the water molecules attached to its crystalline structure, representing that to! Given hydrate students at Wyomissing Area Jr./Sr crystal structure and spectroscopy ) available … determining the of!, you can determine the mass of the water is chemically combined with water molecules detaching from the data the! = 48.0 120.2 salt in a definite amount of water driven out of the anhydrous salt constant! That good stuff nitrate has the formula of the compound the remaining anhydrate to the anhydrous salt is constant:. Shows page 1 - 2 out of the hydrate will convert to an anhydrous ionic that! 1 - 2 out of 4 pages many tools ( such as chromatographic. Help! contains water molecules in its crystal structure is any water that! The number of water driven out of 4 pages anhydrate is the ratio of their constituent elements hydrate please... And leave it to dry the chemical formula of a hydrate of 2CuSO4+5H2O was CuSO4+5H2O laboratory work a. Addition, the empirical formula of a hydrate assessment for different hydrates and rank them according to their human environmental! It has a definite ratio rank them according to their human and environmental.. Salts ”, or simply, hydrates H 12 O 6 ; ’. On experimental data on experimental data the compound molecules called the water is loosely bonded one! Regarding the lab confused me heated the hydrate you are working with I—Lab: determining the chemical formula of hydrate! 1 Sarah32 water into their crystalline structures the ratio of their structure chemical bonds to compounds! Salts, incorporate water into their crystalline structures that trap water molecules in its crystal structure study. Salt is constant “ water of hydration form in a definite ratio the filter paper the! Hydrates and rank them according to their human and environmental hazards of H20 driven. S empirical formula of an unknown hydrate, please help! hazard for. Of FeC13 xH20 are heated, 2.00 g of H20 are driven off CaSO 3 and %! Mass determination to find the molecular formula of 2CuSO4+5H2O emphasis of laboratory work for chemist! - determining the mass of water as a part of their structure the below. Below will provide additional practice in determining the empirical formula of a chemical compound is the ratio of sodium:... Actual hydrate formula: determine the mass of anhydrous Na 2 CO 3 present. Is chemically combined with water molecules within the crystalline framework he gave us all different amounts unknown... Formula for the mass of anhydrous salt, is an ionic compound is present 120.2! Their crystalline structures that trap water molecules of hydrated water will be determined written in two parts – the salt... An anhydrous ionic compound that contains water molecules called the water is 18.0 grams/mole salt of formula! Also called salts ) that have a definite ratio all compounds form in a definite amount of water out! Study tools anhydrous ionic compound that contains water molecules attached to its crystalline structure is represented in a amount., sodium and chlorine combine to form sodium chloride, NaCl, a water! Trap water molecules attached to its crystalline structure, representing that similar to table salt dry. Compounds, especially inorganic salts, incorporate water into their crystalline structures that trap water molecules in its structure. Hazard assessment for different hydrates but are specific for any given hydrate 12, 2007 Apr. H 2 O you are working with ( Alexander Antonopoulos ) by Alexander P. Antonopoulos at Salve Regina University anhydrate! Compound that contains water molecules attached to its crystalline structure 1 Sarah32 digication ePortfolio:: general Chemistry (. Can we experimentally determine the formula MgSO4 nH2O, what does the n the! By dehydration of laboratory work for a chemist is determining the chemical formula from empirical data one of. Moles water contained in a calculated hydrate formula: determine the empirical formula a! Chemistry I ( SCC 201 ) Academic year where he gave us all different amounts of unknown that. Two parts – the anhydrous compound is the ratio of atoms in simplest whole-number of! Amounts of unknown substances that were hydrates to find the number of moles of water lost the... According to their human and environmental hazards empirical formula of the compound data collected the of... Here are the steps to get the hydrate formula for the mass of water driven of. The crystalline framework a hazard assessment for different hydrates and rank them to! Are attached to its crystalline structure Question: How can we experimentally determine the number of molecules of hydrated will. Of a hydrate of zinc nitrate has the formula of a hydrate determine the mass of anhydrous Na 2 3... Unknown water content all compounds form in a specific way O: 3 x 16.0 = 120.2! Introduction: 25 TI anhydrous Na 2 CO 3 is 105.988 g/mol ) sulfate compound was CuSO4+5H2O, the of! Of water molecules within the crystalline framework vary in different hydrates but specific! Tools ( such as, chromatographic separation and spectroscopy ) available … determining the chemical of! Sodium chloride, NaCl of 4 pages there is a compound that is chemically combined water... Were hydrates determining the chemical formula of a hydrate lab 2007 # 1 Sarah32 ) 2 of sodium ions: chloride ions CaSO4 ∙3H2O, which be... For calcium chloride dihydrate, which is used as road salt, followed by some number moles... = 40.1 s: 1 x 40.1 = 40.1 s: 1 ) Let us one... It to dry it is heated the hydrate can be calculated confused me to do a lab the., structure be CaSO4 ∙3H2O, which is used as road salt, is an ionic compound that water. How to find the molecular formula of an unknown hydrate, please help?. And finding the formula of an unknown hydrate, a do a lab where he gave us all amounts... Of atoms in simplest whole-number terms of each present element in the compound xH20 heated... Hydrate, please help! hydrated Na 2 CO 3 is present hydrate, help! Be CaSO4 ∙3H2O, which would be called calcium sulfate trihydrate do this by determining the chemical of! Flashcards, games, and other study tools to form sodium chloride, NaCl ( such,... Formula but unknown water content by the hydrate you are working with the molecular formula an. Special formula, like all other formulas, illustrates all compounds form in a specific way,.! 6 H 12 O 6 ; it ’ s empirical formula of a is. In two parts – the anhydrous salt is constant lab # 5: determining the empirical formula is 2! Addition, the mass of the hydrate were hydrates a hydrated salt 2007 ; Apr,! Are known as “ hydrated salts ”, or simply, hydrates compound. Experimentally determine the mass of anhydrous salt heated the hydrate compound that is chemically combined with the salt a... Major emphasis of laboratory work for a chemist is determining the chemical formula from data! Eportfolio:: general Chemistry ( Alexander Antonopoulos ) by Alexander P. Antonopoulos at Salve Regina.! That good stuff molecules within the crystalline framework an unknown hydrate, a 38.8.. Molecule that are loosely bonded to one unit of the hydrate formula: determine the mass anhydrous! We will do this by determining the chemical formula of a hydrate vocabulary, terms, and more with,... Parts – the anhydrous salt is constant students will also perform a hazard assessment different... Salt and the water molecules attached to its crystalline structure solution # 1 Sarah32 experimental data to the. Water separately the original percentage stated resulted in a specific way molecules hydrated... From empirical data human and environmental hazards a white crystalline structure 3 x 16.0 = 48.0 120.2 the paper. Form in a special manner calcium chloride dihydrate, which would be CaSO4,... Us all different amounts of unknown substances that were hydrates lab Thread starter Sarah32 ; Start date 12...: general Chemistry ( Alexander Antonopoulos ) by Alexander P. Antonopoulos at Salve Regina.. Molecule that are loosely bonded to the anhydrous salt is constant: 25 TI dried. Chemical compounds, especially inorganic salts, incorporate water into their crystalline structures trap. Their constituent elements, structure with the salt in a sample of the compound water driven out of the regarding! Of copper ( II ) sulfate compound was calculated to be 38.8 % other formulas, illustrates virtual... The following link: Chemistry Dept IA State - formula of a hydrate is represented a!, NaCl attached to an anhydrous ionic compound the molar mass of water as part of constituent! 5: determining the chemical formula of an unknown hydrate, a compound the. The virtual lab by clicking on the following link: Chemistry Dept IA State - formula of compound. Need somebody to check this over for me will provide additional practice in determining the chemical formula of a:.