liquiddensity - University of Florida Chemistry Outreach...

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University of Florida Chemistry Outreach Program Liquid Density Lab Estimated time - 50 mins. + 10 mins. clean-up Topics: Density of a solution, Concentration, Trial-and-error, SC.A.1.3 Introduction: Liquid density depends on the amount of solute dissolved in the solution. If there is a higher concentration of solute, such as NaCl, then that solute has a greater mass in that solution. In the same volume of water that solute will have a greater mass in turn causing it to have a higher density. The solute molecules are packed more tightly together in a denser solution leaving them less room to move around. Objective: This lab is best when used in coordination with University of Florida Chemistry Outreach Program Solid Density lab. The students try to layer salt solutions of different concentrations. The solutions are different colors, so in the straw the students want four colored layers with minimal mixing. If they put the denser liquid on top they will liquids can’t float on less dense liquids. The concepts of density and trial-and-error are fully explained. Density = mass/volume, so with more salt in solution the mass of NaCl increases meaning the density increases. Materials:
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liquiddensity - University of Florida Chemistry Outreach...

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