Silly Putty Planning
.docx
School
University of Washington**We aren't endorsed by this school
Course
CHEM 120A
Subject
Chemistry
Date
Dec 19, 2024
Pages
2
Uploaded by PrivateJellyfishPerson3486
ObjectiveIn your group of 4, you will determine the best recipe for your own homemade silly putty by varying the ratio of ingredients and by observing physical properties.PlanningPrepare an individual scientific report with a modified version of the experimental procedure below to include any additional variations to the ratio of ingredients your group would like to test.In addition, your group will research and include in your report a detailed procedure on how to test the following physical properties using common laboratory equipment:Viscosity MalleabilityDuctilityDensity Your report must include the following:Introduction (making silly putty using a polymerisation reaction between polyvinyl acetate and sodium borate)PurposeList of materialsProcedureResults tableDiscussionConclusionExperimental ProcedureYou will add the 50% glue and 10% Borax solutions together in different ratios, to see what properties the final mixture will have. First need to make a data table in your lab notebook like Table1 below.50% Glue Solution10% Borax SolutionObservationsPhysical properties1 Tbsp3 Tbsp2 Tbsp2 Tbsp3 Tbsp1 Tbsp
5 Tbsp1 Tbsp1.For each mixture, first add the correct amount of the 50% glue solution to a Zip-lock bag.2.Then add the corresponding amount of the 4% Borax solution to the bag.3.Seal the bag, and using your fingers squish the mixture around to mix together the ingredients.a.Add food colouring to the mixtures before mixing. Make sure to add the same amount (number of drops) of food colouring to each mixture so that the colouring is a controlled variable.4.Write down your observations in your data table.5.When the mixture begins to form a sticky glob, you can take it out of the bag.6.Write down your description of the physical properties of the material in your table. Remember to use words like runny, slimy, sticky, hard, soft, bouncy, etc.7.Which ratio of ingredients produced the best product? What will you call your new product?List of equipment & material supplied1 bottle of PVA glue10 tablespoons / plastic spoons31 zip-lock bags1 set of a variety of food colouring10 rulers1 set of slotted masses10 protractors10 timers10 thermometers10 x 20 mL and 50 mL measuring cylinders