Exam (elaborations)
CHEM 121 Lab Report 2; Density Determination - Portage Learning
- Institution
- Portage Learning
CHEM 121 Lab Report 2; Density Determination
[Show more]
Content preview
CHEM 121 Lab Report 2 ; Density Determination Name: Date: Experiment : 2 Title: Density Determination Purpose: In this experiment we will measure the density of some liquids including water and solids including bone of a cow, human fat tissue, chicken breast muscle. We also analyzed regular solids/ cylinders including nylon, walnut wood, teflon, copper, PVC - plastic, Aluminum, Brass and Translucent blue acrylic plastic. This was done to unde rstand how to calculate D=M/V Procedure: Have to obtain the mass of all the objects I have listed above. To start, have to place all the objects into a graduated cylinder to determine if there is water displacement. After the object is submerged, have to measure the volume of water. After the measurement of the water after have to calculate the combined mass by using the scale. Have to calculate the density of displacement and the density by geometry. Data/Results/Calculations: 1) Water at room temperature is 21.4 C Used a 10 ml Pipet 9.83 grams/10ml = 0.983 After added another 5 ml of water Now It is 15 ml of water 15ml= 15.54g/ml = 1.03 6 is the density of water There is a 5% error Add another 10 ml of water which now makes it 25 ml 25.49/25ml= 1.02 density It differs by 2% each time but in the lab they try to aim for 5% 2) Cow Bone Volume - Volume initial = 50 ml - 40 ml = 10 ml Mass = 20.24 grams Density by displacement = 20.24 g / 10 ml - 2.02 g/ml 3) Human fat tissue Volume = 2.9 ml Mass = 2.44 grams Density by displacement = 2.44 g/ 2.9 ml = 0.841 g/ml Literature Density of Fat = 0.90 g/ml 4) Chicken breast muscle Volume = 5.5 ml Mass = 5.52 grams Density by displacement = 5.52 g/ 5.5 ml = 1.00g/ml Literature Density of human muscle = 1.06 g/ml 5) Nylon Diameter = 1.60 cm Radius = 0.80 cm Length = 7.60 cm Cylinder Volume = pie ^2 | = (3.1416)(0.8^2) (7.60) = 15.28 cm ^3 Mass = 17.56 grams Density by geometry = 17.56 g/ 15.28 cm^3 = 1.15 g/cm^3 Cylinder Volume = Volume (final) - Volume (initial) = 45 ml - 30 ml = 15 ml Mass = 17.56 grams Density by displacement = 17. ml =1.17 g/ml Literature density of Nylon = 1. 15 g/cm^3 6) Walnut Wood - walnut wood will float in the cylinder, have to hold it down to read the density correctly Diameter = 1.64 cm Radius = 0.82 cm Length = 6.70 cm Cylinder Volume = pie ^2 | = (3.1416)(0.82^2) (6.70) = 14.15 cm^3 Mass =9.16 grams Density by geometry = 9.16 g/ 14.15 cm^3 = 0.65 g/cm^3 Cylinder Volume = Volume (final) - Volume (initial) = 44 ml - 30 ml = 14 ml Mass = 9.16 grams Density by displacement = 9.16 g/ 14 ml = 0.65 g/ml Literature density of Walnut wood = 0.64 g/cm^3The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller DynamicNurse. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
82191 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now