ࡱ;   !"R F̖f@CompObj\WordDocument8ObjectPool̖f̖f FMicrosoft Word 6.0 DocumentNB6WWord.Document.6;  Oh+'0    +7? GSp x3Science F:Microsoft Office:Microsoft Word 6:NormalLAB: TITLE OF LABsciencescience'@<@f@ f@ܥhO e8445555546666626 <667fX6X6X6X6X66666777777&Y8X83756X6@6667655X6X666665X65X66556555566656Lab: The Density of Some Solids and Liquids Introduction The purpose of this lab is to determine the densities of some solids and liquids. You will employ a variety of techniques and measurements to determine these densities. The density of a material is an important intensive property which can be used to help determine whether or not a chemical change has occurred. EQUIPMENT carbon tetrachloride unknown liquid hexane unknown rectangulare solid 100mL gradualted cylinder aluminum foil ice rock #00, #2 rubber stopper cork Procedure 1. TEACHER DEMONSTRATION. The teacher will pour about 50 mL of water into a 100 mL graduated cylinder. 10 mL of carbon tetrachloride will now be added to the cylinder. About 10 mL of hexane will now be added to the water followed by the rubber stopper, a piece of ice and the cork. Record your observations . 2. THE DENSITY OF WATER. a. Mass a 10 mL gradiuated cylinder. Record the mass. b. Fill the cylinder to the mark wit;h 10.00 mL of water and mass the cylinder again. Record the volume of water and the mass of the cylinder and the water. 3. DENSITY OF AN UNKNOWN LIQUID a. Mass a 10 mL graduated cylinder and record the mass. b. Fill the cylinder to the 10.00 mL mark with the unknown liquid and mass the liquid and cylinder. Record the volume and the mass. 4. DENSITY OF THE RUBBER STOPPER a. Mass a #2 stopper Record the mass. b. Fill a 100 mL graduated cylinder about half full of water and record the volume of the water by observing the bottom of the meniscus. Slowly slide the stopper into the graduated cylinder and record the new volume. 5. DENSITY OF A RECTANGULAR SOLID a. Obtain an unknown solid and mass it. Record the mass. b. Measure the length, width, and thickness with a millimeter ruler and record the measrements to the nearest 0.01 cm. 6. THE DESNITY OF A ROCK. a. Obtain a rock or other unknow material from your teacher. Make all the mearuements necessary to determine the density of this material. 7. THE THICKNESS OF ALUMINUM FOIL a. Obtain a rectangular piece of aluminum foil. Record the length and width to the nearest 0.01 cm. b. Fold the foil and obtain its mass. Record the mass. c. The density of the foil is 2.70 g/cm3. Data 1. DEMONSTRATIONOBSERVATIONS 2. DENSITY OF WATERMASS OF CYLINDER MASS OF CYLINDER AND WATER VOLUME OF WATER3. DENSITY OF UNKNOWN LIQUIDMASS OF CYLINDER MASS OF CYLINDER AND AND LIQUID VOLUME OF LIQUID4. DENSITY OF STOPPERMASS OF STOPPER 1ST VOLUME READING (WATER) 2ND VOLUME READING WITH STOPPER5. DENSITY OF RECTANGULAR SOLIDMASS OF SOLID LENGTH WIDTH THICKNESS6. DENSITY OF ROCK 7. THICKNESS OF FOILMASS OF FOIL LENGTH OF FOIL WIDTH OF FOIL Calculations 1. Sketch a picture of the results of the teacher demonstration. 2. Calculate the density of water.. 3. Calculate the density of the unknown liquid. 4. Calculate the density of the stopper. 5. Calculate the density of the rectangular solid. 6. Calculate the density of the rock. 7. Determine the thickness of the aluminum foil WRITE A CONCLUSION: ANSWER THE FOLLOWING QUESTIONS: 1. Ether floats on water and mercury sinks ETHER See the figure on the side. State where the 0.79 g/cm3 following would come to rest after being dropped into the cylinder. a. a diamond (d = 3.5 g/cm3) WATER b. A platinum bead (d=21.4 g/cm3) 1.00 g/cm3 c. an oak ball (d = 0.65 g/cm3) d. a piece of wax (d = 0.90 g/cm3) MERCURY 13.6 g/cm3 2. A 10.0 mL sample of acetone was placed in a stoppered flask. The mass was obtained and found to be 0.7899 g. Calculate the density. 3. A 15.60 g piece of white chalk was found to have a volume of 6.5 mL by displacement. Find the density of the chalk. 4. A rectangular jade block was found to have a mass of 146.25 g and measures 10.00 cm by 3.00 cm by 1.50 cm. What is the density of the jade? 5. Find the thickness of a sheet of gold foil having a mass of 2.00 g and measuring 3.00 cm by 10.0 cm. The density of gold is 19.3 g/cm3. DENSITY Name: _______________________ Partner #1: _______________________ Partner #2: _______________________ Acton-Boxborough Regional High School Due Date: ______________________ Acton-Boxborough Regional High School  |HH(EG(HH(d'p|HH(EG(HH(d'p |HH(EG(HH(d'p00&ta0`0(00&00&00&00&00&VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVSummaryInformation(Microsoft Word 6.0.114ࡱ; 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