# Determination of the density of water lab report

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.

This was achieved through finding the mass and the volume of multiple samples of two types of metals and finding the average density of the samples of each type of metal, keeping record of the mass and volume. For a bulk body without accounting its existing pores and voids, density is represented by the ratio of its mass and volume.

This can be achieved by finding the mass to volume ratio then averaging the results. The purpose of this lab is to find out if the difference in composition of the pre and post pennies will affect their densities. Pennies made before where majority copper but pennies minted after are made with mostly zinc.

With this background knowledge, we expect the. An additional experiment was done to find the specific gravity of a sampling of liquids. The purpose of the experiment was to provide a better understanding of density and to be able to extrapolate unknowns based upon these calculations. The experiments yielded data in keeping with Kinetic-molecular theory in regards to the density of water versus. 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.

The conversion. The density of liquids changes depending on the solutes dissolved in the liquid. Density is found by dividing the mass of an object by its volume. The purpose of this lab was to calculate the density salary increment calculation formula water with sugar mixed within it and calculate the density of a Coca-Cola as well.

It was hypothesized that in the first experiment that as the percent of sugar in the water increased so would the density of the water. For the second experiment, it was then hypothesized that the density of 10 mL. Lab No. Introduction: the density of a substance is its mass per unit volume. Different materials usually have different densities and densities vary according to the pressure, temperature and purity of a substance.

When measuring, there is always a small uncertainty or error and therefore. Page 3 2 â€” Theory â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦ Page 3 3 â€” Experimental Procedure and Results â€¦ Page 6 4 â€” Discussion â€¦â€¦â€¦â€¦â€¦â€¦â€¦. Page 9 6 â€” Bibliography â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦ Essay on Density Lab Words 3 Pages. Objective: The objective of this lab was to calculate the densities of various objects using different techniques.

Graduated cylinder was measured without water or rubber stopper. Graduated cylinder was measured without water but with the rubber stopper. Graduated cylinder, with rubber stopper was filled with an amount of water. Graduated cylinder with water and rubber stopper.

A second volume of water was measured when the metal cylinder was added. The initial volume was subtracted from the second total volume to get the volume of the metal cylinder.

Graduated Cylinder with rubber stopper- Get access to this section to get all the help you need with your essay and educational goals. To do this we will be get the mass of the object and determine the volume of the object by placing it into a liquid.

Then we will divide mass by volume and get its density. Unknown solid C was obtained and weighed. A cylinder was filled half way with water. The volume was recorded. The unknown was placed in the cylinder filled with water and the volume was recorded once again.

Words: Category: Business Pages: 2. Get Full Essay Get access to this section to get all the help you need with your essay and educational goals. Get Access. Determine the volume of your unknown solid sample by liquid displacement. Select a graduated cylinder for best volume determination smaller is better into which the solid can be inserted.

Fill your cylinder about half full of water and record the temperature. Then read the volume as precisely as possible and record it Tilt the cylinder and slide the solid down the inside being careful not to splash water out of the cylinder.

Record the volume. The increase in the volume of water in the cylinder gives the volume of the solid. Density of Unknown : 8. Get instant access to all materials Become a Member.This was achieved through finding the mass and the volume of multiple samples of two types of metals and finding the average density of the samples of each type of metal, keeping record of the 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.

For a bulk body without accounting its existing pores and voids, density is represented by the ratio of its mass and volume. The conversion. The density of liquids changes depending on the solutes dissolved in the liquid. Density is found by dividing the mass of an object by its volume. The purpose of this lab was to calculate the density of water with sugar mixed within it and calculate the density of a Coca-Cola as well.

It was hypothesized that in the first experiment that as the percent of sugar in the water increased so would the density of the water. For the second experiment, it was then hypothesized that the density of 10 mL. Page 3 2 â€” Theory â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦ Page 3 3 â€” Experimental Procedure and Results â€¦ Page 6 4 â€” Discussion â€¦â€¦â€¦â€¦â€¦â€¦â€¦.

Page 9 6 â€” Bibliography â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦ 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. Daba S. Gedafa Labs Completed: Date Submitted: Introduction In lab 12 we learned the fundamentals behind performing Proctor tests. The purposes of these tests are to determine the relationship between the moisture content and the dry density of a soil, with.

For this reason, you are required to thoroughly read through the experiment information presented in the lab manual, and complete a pre-lab for each experiment you do. The prelab must be completed prior to the day of the experiment.

Each Friday I will ask to see your completed prelab before I allow you to enter the lab. If you have not finished the pre-lab, I will not allow you to enter the lab and you will receive. Peter Jeschofnig, Ph.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.

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 water to approximately the 35ml mark. Then recorded the exact volume of water that was added. I placed the cylinder and water on the balance and recorded the mass to every 0. I added the metal to the graduated cylinder until the water level increased by approximately 2.

Being sure to tap the sides of the cylinder to release any air bubbles. I then recorded the volume of the water plus metal to the nearest 0. Then recorded the total mass of the cylinder, water, and metal. I added more pieces of metal to the cylinder until the water level had increased by 2. Then I recorded the exact volume of water plus metal and total mass of cylinder, water, and metal.

### 2: The Density of Liquids and Solids (Experiment)

I repeated the procedure twice more. Being careful not to go over the 50ml mark. And recording the data each time. Calculations: I determined the total volume of metal in the cylinder by subtracting the volume of water from the volume of water plus metal.

Then found the corresponding mass of metal by subtracting the mass of the cylinder and water from the mass of the cylinder, water and metal. I plotted out the graph showing the total mass of metal on the y-axis, and the volume on the x-axis.

I found the slope of the line by taking two random points from the graph, performing the slope formula and finding the density. From the table provided, I identified the unknown metal to be silver. I obtained an unknown solution from the instructor. Then recorded the number of the solution. Then I rinsed a buret with a little of the ethanol solution and filled the buret with that same solution.

I read the buret level to the nearest 0. Then weighed an empty ml Erlenmeyer flask. I turned the knob of the buret and put approximately I read the buret again, to 0. Next I weighed the flask and its contents, by placing the flask on the balance and recording the temperature of the solution.Here's a brightly colored science experiment that not only looks cool, but allows students to develop their own understanding of density! I used this experiment for a freshman Physical Science class, but it could be adapted for many ages and situations.

It's also an incredibly cheap experiment that can be done with virtually no lab equipment if necessary. Objectives: 1. Explain density using examples. Identify and use laboratory equipment. Other potential objectives: 1.

Measure mass. Define mass. Measure volume. Define volume.

Experiment 1: Determination of the Density of Water

Calculate density. Explain density conceptually. Compare the densities of different materials. Design an experiment to test a hypothesis.

You can make this experiment anything you like. I used it very early in the year. Students had measured and timed things for the velocity unit, but I was still teaching measurement and introducing them to the lab. I usually included every skill they could possibly practice.

## Density Lab Report

Required: Pipets Can be purchased online from all kinds of vendors. Sugar instead of salt This is a little messier and if not well cleaned up more likely to be a problem but works just as well. Spoons instead of stirring rods. Any kind of spoon that you use could be substituted for measuring spoons. You just need to know that you're adding a relatively standard amount more for each additional color.

Optional: Electronic Scale or Triple Beam Balance for extension Test tube rack Test tube drying rack Test tube brush for cleaning These optional ones are more about teaching them about these pieces of laboratory equipment. Especially since I did it early in the year, I wanted them to practice writing their own procedures and then critically analyzing what could be improved to make the procedure understandable for someone else. You could also do this as a whole class to model what the process of writing a procedure "looks like" and then have them write their own later in the year.

I usually rushed and did an imperfect job during the demonstration so they could "figure things out" but had the general idea of how to do it.

I'd start by demoing really quickly adding the first and second layers to show that they would just mix and then do one "right" to show the value of doing it slowly and gently. Every student was able to do it by the end of class and it was a great way to start off their science experience with something that was a little challenging at first, but then successful.

Make Salt Water Solutions: 1. Add mL of water to a mL beaker. Add 1 Tablespoon of salt to the water. Technically you should probably add the salt first and then the water. Add 4 drops of food coloring. I let them add as much food coloring as they want and whatever creative colors they want to.When given an unknown substance, there are only a few ways to determine what it is.

One way is to measure its density at a given temperature. Any pure substance has a specific density at a specific temperature. The task for our lab was to determine the density of water and compare our recordings to the actual density of water listed in our lab packet. Then we were to find the density of an unknown liquid and find out what the substance was by matching its density with densities of substances listed in our packet.

In order to find the density of water, one must know its mass and volume first. The rubber stopper was needed to insure no water would evaporate from the flask. This mass was recorded. The Erlenmyer flask was then filled with about 30 mL of deionized water dispensed from a buret.

The flask and rubber stopper were reweighed, and the difference between the intial and final masses was the mass of the water.

In order to find the volume of the water, I took note of the starting point of the water in the buret, then took note of the ending point of the water after about 30 mL were into the flask.

That difference was the volume of water emptied into the flask. This process was performed three times in order to eliminate any error. In order to find the mass of the water and unknown, a simple subtraction problem was used. I simply subtracted the mass of the empty flask and rubber stopper from the mass of the full flask and rubber stopper. A sample equation would be This same method was used to find the volume of water in the flask.

I subtracted the intial amount of liquid in the buret from the final amount of liquid in the buret. This difference was how much liquid was dispensed. An example would be In order to find the density, I simply divided the mass found by the volume found.

For example, To find the average density, I added the three densities I found, then divided that total by three to find the average. The equation for the water was 0. Precision was found by taking the absolute value of the highest density minus the lowest density, dividing that difference by the average density, and then multiplying that answer by For example, the precision for the water was found by this equation: 0.

This gave me an answer of Finally to find the error, I found the absoulte value of my measured density minus the actual density.Density is defined as the mass per unit volume of a substance, and it is a physical property of matter. A physical property can be measured without changing the chemical identity of the substance. Since pure substances have unique density values, measuring the density of a substance can help identify that substance.

Density is determined by dividing the mass of a substance by its volume:. Density is also an intensive property of matter. This means that the value of density is independent of the quantity of matter present.

For example, the density of a gold coin and a gold statue are the same, even though the gold statue consists of the greater quantity of gold. This is in contrast to extensive properties, like volume the amount of space occupied by matterwhich depend of the quantity of mater present. The more matter present, the larger the volume. In Part A of this lab, the mass and volume of distilled water will be measured in order to determine the density of water. Measurements will be performed on three samples of water to improve precision and accuracy.

Mass will be measured with an electronic balance, in grams gand volume will be measured directly with a graduated cylinder, in milliliters mL. Recall that when measuring liquid volumes, the graduated scale must be read from the lowest point of the curved surface of the liquid the meniscus.

The accuracy of the experimentally determined density of water will then be evaluated by comparison to the true, accepted density of water. The graduated cylinder markings are every 1-milliliter. When read from the lowest point of the meniscus, the correct reading is The first 2 digits The last digit Even though it is a zero, it is significant and must be recorded.

In Part B of this lab, the density of aluminum will be determined using aluminum pellets. Again, mass will be measured using an electronic balance, in grams g. However, since the pellets have irregular shapes, their volume must be measured indirectly using the technique of water displacement also known as Archimedes Principle.

This is because the volume of water that the solid displaces when it is immersed in the water is the same as the volume of the solid itself. The accuracy of this experimentally determined density will also be evaluated by comparison to the true, accepted density of aluminum.

The density of aluminum will then be used in an applied problem to determine the thickness of a piece of aluminum foil. The piece of foil used can be considered to be a very flat rectangular box, where. The foil volume can be obtained from the measured mass of the foil and the density of aluminum. Laboratory investigations involve collecting data, which is often numeric.

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