An Exercise in Freezing Point Depression

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Data Sheet IIB:The Corrosive Effects of Deicers on Concrete and theSurfaces of Iron Embedded in ConcreteCAUTION: Do not physically disturb the surface of the iron rod or the surface of theconcrete during your examination of the samples.ConcreteRatingConcrete Sample Rating1 2 3 4 5Some Scalingsurface penetrates“powder” the surfaceno scaling,surface intactFairly deepcorrosion,large cracksand flakesSoftsurface,deepscalingIron BarRatingIron Bar Sample Rating1 2 3 4 5Orange Mostlysurface orange, sizesplotches intactEntirelyintact,no colorchangeEntire barorange,someflakingBar visiblysmaller aspieces flakeoffUse your best judgement in assigning the ratings.Deicer Solution Concrete Sample Rating Iron Bar Sample RatingWater10-18
Name ___________________________________________ Date ____________________Partner __________________________________________ TA _____________________Experiment 5 DATA SHEETPart A. Calibration of the Temperature Probe1. a) Record the trial Calibration Curve Equation here: ______________________________b) Record the Calibration Curve Equation here: _________________________________2. Does the probe measure temperature directly? Explain.Part B. Calorimeter Constant DeterminationTrial 1 Trial 21. Volume of cold water ________ mL ________ mL2. Mass of cold water ________ g ________ g3. Temperature of cold water ________ °C ________ °C4. Volume of hot water ________ mL ________ mL5. Mass of hot water ________ g ________ g6. Temperature of hot water ________ °C ________ °C7. Final temperature after mixing (T f) ________ °C ________ °C8. Calorimeter constant ________ J C° −1 ________J C° −19. Mean calorimeter constant ____________ J C° −1Show complete calculations of the calorimeter constant here.10-19
Page 4: Week One: Gathering DataYour TA wil
Page 9 and 10: Part III: Determining the Enthalpy
Page 11 and 12: Part B. Determination of ∆H solnf
Page 13 and 14: Name: _____________________________
Page 15 and 16: Name: _____________________________
Page 17: Name: _____________________________
Page 21 and 22: Name ______________________________
Page 23: Name: _____________________________

An Exercise in Freezing Point Depression

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