Density of Metals
Problem: How does the mass and volume help determine the density of known metal samples? Hypothesis: When comparing the density of Zn(zinc) and Cu(copper), you will find that Copper is more dense than Zinc. You can test this out by using the density formula D=m/v. Materials:

* 2 metals (options: zn, al, or cu)
* 3 samples of each metal (small, medium, and large)
* Scale/Balance
* Calculator
* Water
* Graduated Cylinder
Safety:
* Be prepared for your work in the laboratory.
* Read all procedures thoroughly before entering the lab and/or starting experiment. * Be alert and proceed with caution at all times in the lab. Step by Step Procedure:
1. Wash hands with soap and water
2. Grab all materials and set them out
3. Pick one metal out of the two you have chosen to compare and get your three samples (small, medium, large) 4. Find the mass of each sample using a scale/balance and then find the volume (using a graduated cylinder filled with water and putting each sample in the filled graduated cylinder to determine the volume) 5. Create a data table and write all the information collected down 6. Repeat steps three-six with the second metal of your choice 7. On logger pro, plug in all needed information to make a graph for each metal. If you do not understand how to use the program or are having difficulty with it then ask your instructor

...Chemistry
Period 7
9/17/13
The Density of Metals Lab
BACKROUND: Density is a constant relationship between the mass and volume of a specific type of matter. Measurements of both mass and volume can be obtained for a metal sample. The relationship can be shown graphically by plotting the volume of a sample on the horizontal x-axis and the mass of the sample along the vertical y-axis. Plotting the values for several samples, a linear relationship can be seen for a density (slope=density).
PURPOSE: During this lab, you will investigate several questions about density. 1) What are the densities of metals A and B? 2) Does the density of a piece of metal depend on its size? 3) According to percent error calculations, which of the methods of determining density is the most accurate? 4) Can you identify the metals by their densities?
PRE-LAB QUESTIONS: 1) The volume of the water in the cylinder below is 43mL.
2) The volume of the metal shot and the water in the graduated cylinder is 73mL.
3) The volume of the metal added to the graduated cylinder is 29mL.
MATERIALS:
- Metal cylinders - Graduated cylinders - Calculator
- Water - Electric Balances
SAFETY: No metals should be left in the sinks. When adding...

...3
Density of Metal Lab
I. Purpose and Procedure
In this experiment, groups were each given two unknown metals in which they had to find the mass, volume, and density. After finding the density of the unknown metals by dividing the mass by the volume, the groups had to exchange data and find the average densities of the two unknown metals. A table of accepted value of metals and their densities was given out to each group so they could match the average densities to the accepted values and identify what they unknown metals were.
The objective of this lab was to determine the identity of unknown metals by calculating their densities, and to determine a graphical relationship between the mass and volume of a given substance.
Each group was given two unknown metals, a 100 mL graduated cylinder, a balance, and a weighing boat. To find the mass, the experimenters had to weigh the empty weighing boat. After, they had to weigh the unknown metal in the boat. Then, they had to subtract the mass of the weighing boat from the mass of unknown metal to figure out just the mass of the metal. To find the volume, the experimenter filled up the graduated cylinder to 50 mL. Then, they added the unknown metal to...

...Density of Metals Lab
1. Purpose
The purpose of this lab was answered in 4 questions, and their answers are here shown. The density of the metals we used were 5g/cm3. The density of a metal piece does not depend on its size, it depends on the total mass and total volume. The most accurate way of determining density is dividing mass by volume. You can’t identify metals by their density. It can help you narrow the options down, but you can’t identify a metal by using only its density.
2. Question
Can we find out the density of a metal only using water?
3. Variables
Independent Variable(s): Temperature (27ºC); Mass (5g)
Dependent Variable: Density of Metals
4. Pre-Lab Questions
a) 43 cm3
b) 73 cm3
1. 30 cm3
2. 3.43 cm3
3. Its density is 7.131 g/cm3
5. Materials
Metal A (Zinc)
50cm3 measuring cylinder
25cm3 measuring cylinder
250cm3 beaker
Glass Water
Tap Water
Balance
6. Procedure
Find the mass of the watch glass
Put the copper piece on the watch glass and find their mass
Fill a 50cm3 graduated cylinder with enough water that you think will completely cover Metal A and record this volume in the data table
Fill a 25cm3 graduated cylinder with enough water that you think will completely cover...

...Comparing the Density of Metals
Question: What is the effect of changing the type of metal on its density?
Hypothesis: If a different metal type is used, then the density will change.
Materials:
4 metal samples
Balance
50 ml graduated cylinder
Water
Paper towels
Apparatus:
Pre-Lab Questions:
1. What’s the formula to calculate density?
D = M / V
2. What are the units for density?
g/mL, g/L, mg/mL, g/cm3
3. A sample of metal has a mass of 85.6 grams and a volume of 12.1 mL. What’s the density of metal x?
Given:
M = 85.6 g
V = 12.1 mL
D = ?
D = M / V
= 85.6 / 12.1
= 7.07438016529 g/mL
Therefore, the density of metal x is about 7.074 g/mL.
4. A metal bar has a density of 19.3 g/mL and a mass of 50 g. What’s the volume of the bar?
Given:
M = 50 g
V = ?
D = 19.3 g/mL
V = M / D
= 50 / 19.3
= 2.59067357513 mL
Therefore, the volume of the bar is about 2.591 mL.
Procedure:
1. Select 1 of the 4 metal samples
2. Use the balance to measure the mass of each sample to the nearest 0.01 g. Record the masses in the data table.
3. Fill the graduated...

...Ankit Shingala
Dr. Campagnolo
Chemistry H
September 24, 2013
Lab on Density of Four Metals Conclusion
In this lab we studied the densities of four different metals using a caliper, a digital scale, and a calculator. Three metals were pure elements like copper, iron, and aluminum. The fourth metal was an alloy which was brass. The purposes of this lab were to demonstrate that differentmetal elements have different densities, and that alloys have densities somewhere between those elements that compose them. We also calculated the percent errors between the actual densities and the expected densities. The actual density of aluminum was 2.76g/cc with the percent error being 2.67%. The actual density of iron was 7.88g/cc with the percent error being 0.25%. The actual density of copper was 9.07g/cc with the percent error being 1.2%. The actual density of brass was 8.61g/cc with the percent error being 1.9%.
Overall, errors were low, falling between 0.25% and 2.67%. In this lab, there were many possible sources of error which may have impacted results. First, many of the metal samples may not have been cut to exact measurement by machines therefore leading to altered results for the mass of the samples. Second, many of the samples of the...

...MEASUREMENT OF PHYSICAL PROPERTIES: DENSITY
Introduction
According to the definition Density is the physical property that allows us to compare the mass of substances for a specific volume. In this Lab activity that took place in Deree College, Agia Paraskevi Campus we deal with the density of solids and density of liquids. The main purpose of this experiment is to understand what in reality density means, how we can measure it, how useful it is, what is the difference between density of solids and liquids, if the measurements that we did are been accurate and how we can calculate the percentage errors.
materials
3 different metals
A) copper
B) iron
C) aluminum
- 3 Different liquids
A) Water
B) Olive oil
C) Alcohol
- Balance
- Cylinders of 25ml, 100ml
- Calculator
DATA/RESULTS
In this Lab activity we saw the differences between the density of solids and the density of liquids.
Firstly we obtained three different solids a piece of aluminum, a piece of copper and a piece of iron, and we measured their masses by using the balance. Also, we measured their volume by using a cylinder with distilled water, then we have measured the volume, and then we put in the metal and recorded the total volumes. After that we calculated each density and we recorded the average...

...purpose of the lab was to determine density of both regular and irregular shaped objects. Throughout the lab I found out that both of the small and large silver rod, do not have the same density, and also found out that the gold rod is not real gold.
My hypothesis is that since, the large and small silver rod has about the same density I believe that they would have about the same amount of volume. They both might displace the same amount of water on the graduated cylinder.
The Materials we used throughout the lab was:
Metal rods (Gold & Silver)
Wooden block
Water
Scale
Ruler
Graduated cylinder
Procedure thought out the lab:
1. First step we did was get the materials and went to out stations with our partners.
2. Second me and my partner measured the mass of the metal rods and the wooden block and recorded them on the worksheet.
3. After we filled up the graduated cylinder with water and dropped one of the metal rods and the water, the water amount that increased in the cylinder was the volume of the rode that was placed in.
4. We continued to measure and record the volume of each of the metal rods the same way as the first.
5. We measured the length, width, and height of the wooden block and recorded it. Then multiplied them altogether to get the volume of the block.
6. After gaining the measurements of the mass and volume of the metal rods and the...

...Lab Report
Question- Why do few objects float in water where as others sink?
Hypothesis- I think the objects that have a greater density than water will sink. So whichever object has a density more than 1g/cm³ will sink in water. This is known as relative density where the density of the substance is compared to the density of water. Hence, the object that has a greater mass: volume ratio than water will sink.
Materials-
* 1 measuring cylinder
* 1 rectangular prism
* 1 ball of plasticine
* 1 cylinder
* 1 cube
* 1 micrometer
* 1 vernier calliper
* 1 balance
Variables-
Independent- The object that was used
Dependent- The density of the object
Controlled- The water in the measuring cylinder
Procedure-
1. Get the 4 objects (rectangular prism, ball of plasticine, cylinder, and cube) that you’re going to experiment with.
2. Measure the mass of the rectangular prism by weighing it on the balance. Weigh it three times to get an accurate measurement. Then find the measurements of the length, width, and height using a vernier calliper. Use the formula l× b× h to find the volume. Divide the mass by the volume to get the density.
3. Measure the mass of the plasticine by weighing it on the balance. Weigh it three times to get an accurate measurement. Now fill up the measuring cylinder to a certain level and note it down. Next, drop the...