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(If solid appears in the water after 1 g is added, the solid is not soluble. If a solid appears somewhere between adding 1 g and 5 g, the solid is slightly soluble. If the entire solid still dissolves after adding 5 g, the solid is very soluble.)Part 2: Determine the Density of the Solid
If the solid is even slightly soluble in water it is not possible to measure its density in thislab. However, if the solid substance is not soluble in water, you can measure its density using the "displacement of water" method.2, Take water from the Materials shelf and add 20 mL to the graduated cylinder.+total mass (graduated cylinder plus water): 74.000volume:20ml4, Take solid #4 from the Materials shelf and add 10 g to the graduated cylinder. +the mass = 84.000g+and volume=29.52ml___> solid mass=84.000-74.000=10.000g----->solid volume = 29.52-20.00=9.52ml---> Density= 10.000/9.52=1.05-------------Part 3: Determine the Melting Point of the SolidTake a clean test tube from the Containers shelf and place it on the workbench. --->mass: 27.400 gTake solid #4 from the Materials shelf and add 5 g to the test tube.---> volume: 4.8ml, mass: 32.400Take a thermometer from the Instruments shelf and attach it to the test tube.---> 21.5CTake a Bunsen burner from the Instruments shelf and place it on the workbench.Move the test tube onto the Bunsen burner. Turn on the Bunsen burner by clicking the black knob at the bottom to the low flame. +temperature of the substance's melting point -->71CIf the temperature reaches several hundred degrees Celsius and the solid has still not melted, stop the test and record the melting point as greater than the highest temperature that was displayed on the thermometer.---------------------Experiment 2: Identify Unknown LiquidsThe Materials shelf contains six unknown liquids labeled liquid #7 through liquid #11. Your assignment is to test liquid #7, but we encourage you to test any of the other unknowns as well.Part 1: Determine the Density of the LiquidThe graduated cylinder onto the balance.its mass:--->54.000gTake liquid #7 from the Materials shelf and add 10 mL to the graduated cylinder. -->total mass (graduated cylinder plus liquid):62.600g-->The volume of the liquid: 10mlIn your Lab Notes, calculate the liquid's mass.
--> 62.600-54.000=8.600g--->volume 10mlCalculate the liquid’s density. =8.600/10=0.86g/ml-----------------------------Part 2: Determine the Boiling point of the LiquidThe Test tube onto the balance.its mass:--->27.400gTake liquid #7 from the Materials shelf and add 10 mL to the Test tube . --->27.400g-->total mass 36.000g-->The volume of the liquid: 10mlIn your Lab Notes, calculate the liquid's mass.--> 36.000-27.400=8.600g--->volume 10mlCalculate the liquid’s density. =8.600/10=0.86g/mlRecord the temperature of the liquid's boiling point. --->107C