Ashley Robins
9/13/11
Honors Chemistry
Period 4
Density Lab
Purpose:
1. To determine the density of a solid using different laboratory techniques for measuring volume. 2. To use the intensive property of density to identify an unknown substance.

Procedure:
1. Obtain a bag marked with a number containing a cube and a cylinder from the teacher. Record the number on the bag in the data table.

Density of a cube:
Using a balance, record the mass of the cube to the nearest tenth of a gram. Then measure the length, width and height of the cube to the nearest hundredth of a cm. Last, calculate the volume of a cube using the formula L x W x H.

Density of a cylinder by water displacement:
Using a balance, record the mass of the cylinder to the nearest tenth of a gram. Then fill a graduated cylinder of water about half full. Record the volume to the nearest tenth of a mL. After that you carefully drop the cylinder in the graduated cylinder and record the new volume of water to the nearest tenth of a mL. The last thing you do is subtract the volume of the water you had at the beginning from the volume of water you had after adding the cylinder. This number is the volume of your cylinder.

Data:

Cube Cylinder Mass of cube:10.4g Mass of cylinder: 29.1g Length of cube:2.50cm Volume of water before adding: 49.0mL Width of cube:2.50cm Volume of water after adding: 52.0mL Height of cube:2.50cm Volume of cylinder: 3.0mL Density of cube:.693g/cm3 Density of cylinder: 9.7g/cm3

Conclusion:
This lab is meant to teach you how to use certain lab instruments and how to find the density of objects by using water displacement. It is also supposed to teach you how to determine what an object is by finding its density. Some important terms in this lab are water...

... 10/25/12
Chemistry Per. 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 the water and measured where the line rose to. Next, they subtracted 50 mL from the amount of mL with the...

...LAB ACTIVITY 1
MEASUREMENTS IN SCIENCE: MASS, VOLUME, AND DENSITY
Purpose:
The purpose of this experiment is find the density of two metals using their mass and volume.
Introduction:
The purpose of the experiment that was conducted was to measure and calculate the density of two different metals. Density is an important characteristic of a material. The density of an object shows how much mass is contained in the unit volume. To calculate the density of metals the experimenters had to find out the mass and volume of each and then use the following formula: d=m/V. M or mass is the amount of matter that an object contains and it can be measured using a balance. The V or volume of an object represents the space that an object occupies.
Material:
-Two types of metals
-Balance
- 80ml of water
- 100ml graduated cylinder
Procedure:
-Obtain pieces of two different metals. Determine their mass using a balance. Record your measurements. Determine their volume in the following way: Place 75-80 ml of water in a 100ml graduated cylinder. Read the volume V(in) with precision of 0.5 ml. Place the piece of metal carefully in the water. Read the new volume V(fin). Calculate the volume of the metal V(m). (Vm = Vfin-Vin). Record your results.
- Calculate the density of the two metals
-Ask for density from the literature and calculate percentage...

...Abstract
The purpose of this experiment was to identify whether density is an extensive or intensive physical property. By using water displacement, the volumes of the paper clip samples were measured and the masses were obtained by using an electronic balance. Each mass and volume was unique to their sample so by using their values, density was used to identify substances in the lab. After conducting the experiment, the results showed that there was a positive slope between the different paper clip samples’ masses and their volumes. It was concluded from this pattern that density is an extensive property.
Introduction
In science, there are two physical properties that are used to classify certain substances; extensive and intensive. Extensive physical properties are properties whose values vary directly with mass. (“Thermodynamic Properties” 2012) Therefore, they rely on the sample’s mass. Intensive physical properties are properties that are independent of the amount of mass. (“Thermodynamic Properties” 2012) Therefore, they do not depend on the sample’s mass. One physical property that was investigated during an experiment was density. Density is a physical property of matter that can be measured by dividing the matter’s mass by its volume. The purpose of the experiment was to answer the following question: Is density an extensive or intensive physical property? To...

...
Introduction:
Density is defined by its mass per unit volume, and is most often written in mathematical terms as; d = m / v
Mass is usually given in grams, g, and volume is given in cubic centimeters, g/cm3, or, grams per milliliter, g/mL. Density is not a property that depends upon the amount of substance present. For example, one gram of lead and one ton of lead have the same density. Density also does depend on temperature. For instance cold water is denser than warm water; ice is less dense than both. The method used for determining the density of a substance depends on the nature of the substance. In this lab the densities of unknown irregularly shaped solids and liquids was determined. Accuracy and precision of the results will be estimated, and attention will be paid to the correct use of the significant figures. The experiment approach that will be used will tell the mass and volume of the metal and liquid determined by measuring these two quantities with a graduated cylinder and biuret.
Procedure:
a) The density of metals
First I obtained a quantity of unknown metal. Recording the unknown number. I used only one type of metal for this part of the experiment.
The unknown metal that I was instructed to use was a chunk, therefore, I used a 50ml graduated cylinder. When using the 50ml cylinder, I filled it with...

...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....

...Introduction:
The purpose of this lab will be to investigate the concepts of accuracy and precision for quantitative measurements using density as an example. The density of a sample will be found experimentally and compared to a known value. The relationship of averages and different analysis techniques to percent error will also be explored.
Density is a characteristic of a substance which can qualitatively be described as the amount of matter (mass) squeezed into a given space (volume). The density of substance remains the same no matter the size of the sample at a given temperature.
Quantitatively, density can be expressed as the mass of a substance per unit volume, and the volume of a cylinder can be expressed as π times the radius squared times the height.
(Density=Mass/Volume V = π(Diameter/2)^2 x Height)*
*Microsoft Word Starter 2010 does not allow creation of equations. This was the best alternative
Materials:
Density sample cylinders; metric ruler; Electronic balance
Procedure:
Measure the mass, height, and diameter of five different cylinders from the substance as precisely as possible to ensure the correct measurements are recorded.
Data Table:
Cylinder # | Mass (grams) | Height (centimeters) | Diameter (centimeters) |
2 | 12.82g | 4.60cm | 1.55cm |
4 | 16.51g | 5.60cm | 1.10cm |
8 | 21.37g | 7.60cm | 1.60cm |
10 | 24.09g |...

...FE 106
GENERAL CHEMISTRY
EXPERIMENT-1
DENSITY OF LIQUIDS
PREPARED BY BURAK COBAN
PURPOSE:
In this experiment we will learn how can we find the density of liquids and liquids of density how change effect of temperature, pressure, mass, volume and concentration. For this reason we will take NaCI solutions with different concentrations and we will measure their densities, so we will find out the effects of concentration on density of solutions.
THEORY:
Density is a physical property obtained by dividing the mass of a material or object by its volume (i.e., mass per unit volume).
Here is an old riddle:” What weighs more, a ton of bricks or a ton of feathers?” if you answer that they weigh the same, you demonstrate a clear understanding of the meaning of mass- a measure of quantity of matter. Anyone who answers that the bricks weigh more than the feathers has confused the concepts of mass and density. Matter in a bricks is more concentrated than in a feather – that is, the matter in brick is confined to a smaller volume. Bricks are denser than feathers. Density is the ratio of mass to volume.
Density= Mass (m) / Volume (V)
|Density of matter | d | g/ml |
|Mass of matter | m...

...Constant Density: Displacement of Zinc and Tin
Introduction:
Density is the concentration of molecules within an object on relation to its size. The formula for measuring density is mass/volume. In the experiment preformed for this lab report, calculating the density of a regular object (a wooden block) and two other irregular objects (zinc and tin) were found by a process known as water displacement. The purpose of this experiment was to prove that the density of an object remains the same no matter how much of it you have.
Materials:
1.
2. A wooden block
3. A graduated cylinder
4. Sink with running water
5. Ruler
6. A sample of zinc
7. A sample of tin
8. Electronic balance
9. Pencil/ pen and tables to record the data
Methods:
A. Finding the density of a regular solid
1. Measure the length, width and height of the wooden block, record the data in your table
2. Multiply the length, width, and height to find the volume of the block, record in your table.
3. Use the electronic balance to find the mass of the block.
4. Find the density of the block by dividing the mass by the volume.
5. In this experiment, the density was measured by g/cm3.
B. Finding the density of a liquid
1. Measure the mass of the graduated cylinder on the electronic balance and write...