Lab Report Essay

Submitted By kikisio15
Words: 866
Pages: 4
Open Document
Molar Mass of Butane Lab

Quique Garcia
Date of Lab:3/21/14

Introduction The purpose of the lab was to find the molar mass of butane threw an experiment. [1] Butane is a flammable gas found commonly in lighters as an energy source. [2] Molar mass is how much a compound weighs, based on what elements are found in it, and how much of the element is present. If the volume of butane is found then the molar mass becomes possible to find as well. Dimensional analysis will be used in order to convert the volume of the gas collected to mass.
Volume/24.5 = Number of Moles
Grams per Mole (Molar Mass) = grams of butane/ moles of butane Results/Data
The lab was completed as follows. The equipment need was gathered. A pneumatic trough, a graduated cylinder, a lighter, a scale, and water where used. The mass of the lighter was found on the scale before beginning. This was followed by the pneumatic trough being filled to roughly about 3/4th of the way full. The graduated cylinder was then filled completely. Someone’s hands where used to cover the top of the graduated cylinder in order to prevent any water from escaping. The graduated cylinder was flipped upside down in and submerged in the water. If was made sure that no air bubbles entered the graduated cylinder. While having the cylinder held slightly at an angle the lighter was placed underwater and under the cylinder, and the butane gas was released into the graduated cylinder. The gas was collected until reaching 75mL. The lighter and graduated cylinder where removed from the water and the lighter was dried. The water was discarded and the mass of dry lighter was found.

Procedure:
Molar Mass of Butane
1) Obtain a butane lighter
2) Find the mass of the butane lighter using a scale and record (Data table at end) 3) Fill a pneumatic trough and 100 mL graduated cylinder with water
4) Cover with hands and flip upside down in the trough without letting any water out or air in
5) Place the lighter underneath the graduated cylinder and release the butane into the cylinder 6) Continue releasing butane until the gas lowers the water to 75mL 7) Dry the lighter, find the new mass of the lighter and record (Data table at end)
8) Add one of the compounds to each pile of sodium acrylate 9) Record on Data Table (Table on last page) Observations:
The mass of the butane collected was very light.
The water and room where not at STP, therefore volume conversion would have to change.
Depending on how the lighter was tipped more or less butane could flow out of the lighter at once.
Questions
1. If an air bubble had been in the flask before it filled with butane then the air bubble would have contributed to reaching 75 mL, which was supposed to only be 75mL of butane, thus making the measurement less precise.
2. The standard molar volume (22.4L/mol) could not be used in the investigation due to the fact that the standard molar volume only applies if the conditions were in STP. The water was not at STP.
Discussion
The purpose of the lab was to find the molar mass of butane C4H10 . This was done through the use of dimensional analysis, mole conversions of volume to moles, and also from moles to mass.
The molar mass of butane C4H10, as proven by the data obtained during the lab was able to be found.
Show More

Related Documents: Lab Report Essay

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

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

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

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

Lab Report On Density

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…

Words 1492 - Pages 6