Lab Report On Density

Submitted By agals77
Words: 1492
Pages: 6
Open Document
9/26/13
I have completed this lab report in accordance with the NA Honor Code.
X_______________________________________________________

An Introduction to Calculating Density

Introduction:
Purpose: To determine the density of different substances using mass and volume measurements that have been calculated. Also, to familiarize oneself with the materials in the laboratory and to investigate the precision of measurements using precision of error. Hypothesis: If the density of a solid and of a liquid is calculated then the solid will be denser than the liquid.
Theory: This experiment involves analyzing quantitative data that has been measured. Significant figures were calculated in order to show the precision of the experiment. Also, students compared two densities together by finding the measurements of the mass and volume. The equation for calculating density is mass divided by the volume. Density itself is the quantity or mass of an object in a given space (volume). Mass is the amount of matter in an object and volume is the amount of space it occupies. This lab looks at density of water, alcohol (ethanol), and a metal (copper). Percent error is used to calculate how precise and instrument is. The accepted value is subtracted from the experimental value and then divided by the accepted value. The smaller the number the more precise. A negative indicates less than the value and positive is over the value.
Variables: The independent variable is the volume of the liquid. The dependent variable is the mass that is changing with the volume. For the metals it is actually the opposite. The independent variable is the mass with the metal, so therefore the dependent variable is volume of the liquid in the cylinder. The controlled variables are the scale and the significant figures, the room temperature, the size of beakers testing.
Materials and Methods:
List of Materials:
3 graduated cylinders: 10mL, 25 mL, and 50mL
1 balance to the 0.01 precision
Alcohol- Ethanol
Distilled Water- faucet may be used as well
A metal, copper was used
1 apron
Procedure:
1. The materials were gathered and set up.
2. The students put on aprons and goggles.
3. Next, the mass of a 10mL graduated cylinder measured and recorded to the nearest 0.01g. This was repeated for 25mL and 50mL cylinders.
4. The student carefully poured water into the graduated cylinder and proceeded to measure and record the newly calculated mass. This was repeated for all three-size cylinders.
5. The student read the volume on the cylinder at eye level and recorded it. Then the student also calculated the mass of the water by subtracting the mass of the cylinder from the mass of the cylinder and water combined. Finally, the student used the given formula to calculate the density and it was recorded.
6. The masses of the 10mL, 25mL, and 50mL cylinders were measured and recorded again.
7. Then, instead of water the student poured ethanol into the cylinders and calculated the mass once again.
8. The volume was read at eye level and recorded and the ethanol’s mass was calculated as well. The density was finally calculated.
9. After that experiment, the density of a metal was performed. The student put a small amount of copper into a 25mL cylinder that was filled with water and measured it. *The student measured the mass of the cylinder with water previously to this step. *
10. Then more copper was added to the graduated cylinder. The amount may vary as in the experiment enough copper was added to deflect the volume. Once again this was measured and recorded. This step was repeated again for a 3rd trial.
11. The mass of the metal itself was calculated as well as the volume, which was read. Finally, the density was once again calculated for each trial.
12. The students cleaned up the materials and the area.
Results:
Qualitative Observations: The water and the ethanol had air bubbles when they were first poured, but in general it was a
Show More

Related Documents: Lab Report On Density

Lab Report Format

ANATOMY & PHYSIOLOGY CLASS: WRITING LAB REPORTS The following is an explanation of the format that is to be used for writing lab reports. There will be lab activities for each Chapter in the textbook. 1. Lab Report grades are given the same value as a test grade. It is very important that they be done correctly and thoroughly. 2. All lab reports should be typed using Times New Roman and only 12 font. (no exceptions) 3. In the upper left hand corner include your name, high school, and A & P…

Words 1045 - Pages 5

lab report Essay

CHM1032L pre/post lab instructions Preparation is a key to success in this lab. 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…

Words 1046 - Pages 5

Drosophila Lab Report

Drosophila Lab Report By Logan Aker University of Colorado, Boulder Principles of Genetics Lab, MCDB 2151, Tuesday 4 – 5:50pm TA: Alexander Martinez Abstract In this lab, we carried out two different crosses using Drosophila; a monohybrid cross and a sex-linked cross. This lab specifically tested Mendel’s laws of independent assortment and the law of segregation in genetics. We selected males and females of two different phenotypes and mated them (and their succeeding offspring)…

Words 1729 - Pages 7

Spectroscope Lab Report

Spectroscope Lab Report Naudia Blanton Period 9 Due: 1-2-14 Abstract: The purpose of the Spectroscope lab is simple. It is basically to see the spectrum of different light sources. Some of the light sources included are sunlight and a candle. It focuses on the difference between their spectrums. Background: Electromagnetic Spectrum - The range of wavelengths…

Words 445 - Pages 2

Lab Report Essay

Kinetics Lab Report Chemistry 152, Fall 2013 Kelli Forbes Susan Borowski Section: 5 September 2013 Abstract: For this experiment the main objectives were to determine the best wavelength to use for a Beer’s Law Analysis for the dye assigned which happened to be brilliant blue. The molar absorptivity of Brilliant Blue at 622.0 nm had an absorbency of 0.321. These results were obtained by completing a series of five cuvets…

Words 390 - Pages 2

Momentum Lab Report

Lab report #5 In this experiment, we used a nearly frictionless surface to compare velocity characteristics to that of momentum, suing different weights, as well as bouncing carts and sticking carts together. This is important to understand, because momentum is a combination of weight and velocity, where as velocity is independent of weight. The materials we used for this experiment include 2 carts, with weights of 139.7 grams and 290.4 grams. We also used springs on the ends to “bounce”…

Words 459 - Pages 2

Lab Report Essay

Sheffield International College AS1b SE FC Lab report Title:Lab report of the constant of elasticity Group:S204 Student ID:25436 Teacher:Simon Dale Elasticity experiment report Introduction: In physics, elasticity is the tendency of solid elastomeric material, while after deformation recovering to the original shape. And spring is one of the elastic objects which can return to the original size when forces were…

Words 901 - Pages 4

Lab Report Essay

MEC 325/580 Lab Report CNC Machining Lab Report Date: March 18, 2013 Group Leader: Jian Wu Team Members: Group Number: G4 Regment No.: D Insturctor: CONTENTS 1.Objective and introduction. 2.Principles and practice. 3.Design and result. 4.Conclusion and recommendations. Appendices 1. Objective and introduction * Objectives Operate the CNC milling machine using G-codes, M-codes in a CNC program. * Equipment: Minitech CNC machine (Series 2) * Machine…

Words 1090 - Pages 5

lab report Essay

DO NOT COPY ANY MATERIAL FOR THIS REPORT. IF YOU COPY FROM THE LAB MANUAL OR ANOTHER SOURCE YOU WILL RECEIVE A ZERO FOR THE REPORT. WRITE EVERYTHING IN YOUR OWN WORDS. Experiment (Input Number): (Type full title here.) Name Date Class Title and Section Instructor: Katherine Walton Objective In this section you will discuss about the purpose of the experiment. It should only be a few sentences long and should include information pertaining to what it is you are trying to analyze…

Words 567 - Pages 3

Stoichiometry Lab Report

David Francisco Ms. Hansen H Chemistry 3 10 January 2015 Stoichiometry Lab Report What is the actual yield compared to the theoretical yield of copper from the single replacement reaction of Fe + CuSO4Cu+FeSO4? Purpose: Determine theoretical yield of copper within the experiment using provided materials and analyze difference between the actual and the theorized yield. IV: Amount of Iron (Fe) DV: Mass of Copper (Cu) Control: SO4 (Sulfate) Materials: -Distilled Water -Coffee Filter -Hot Plate…

Words 1041 - Pages 5