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APA
Subject:
Life Sciences
Type:
Lab Report
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English (U.S.)
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Formal Lab Report: Density of Aqueous NaCl Solutions

Lab Report Instructions:

Formal Lab Report

Format MUST BE TYPED! (the lab report is prepared AFTER the experiment has been performed) Each student is responsible for submitting an original, independent, legible, and presentable laboratory report (worth 100 points total) written in the PAST and PASSIVE tenses containing all the following sections (include proper section headings) in the following order. Guidelines as to what information to include in each section appear beneath the section heading. Lab Reports are completed AFTER the experiment has been performed and are to be TYPED in an easily readable font (such as Arial or Times New Roman), font size of at least 12, and calculations hand written IN INK. 1. Experiment title and date performed (5 points) 2. Purpose (15 points) Why was the experiment performed? Use full sentences. What was the goal? If a specific technique was used, what was it? 3. Modifications to the Procedure (5 points) Explain any changes made to the experimental procedure as written in the laboratory manual. DO NOT WRITE OUT THE ENTIRE PROCEDURE! If no changes were made and the instructions were followed as written, mention that also. Do not omit this section. 4. Data and Observations (15 points) Include all numerical raw data in this section. Include any masses, volumes, observations, etc. Which the experimental procedure Instructs you to record. Include units with all numbers. 5. Calculations (30 points) Include all mathematical calculations in this section. Include units with all numbers. Answer any post-lab questions from the experimental procedure writeup in this section only if indicated by the instructor. 6. Conclusion and Error Analysis (30 points) In this section, essentially answer the purpose. Was the goal of the experiment achieved? Discuss results: If yes to above, provide data/explanation to support this. If no, explain why not. mention possible experimental errors in this section, both those the group knowingly made and those inherent In the experimental Procedure. 100 points TOTAL

Lab Report Sample Content Preview:

DATA OF AQUEOUS TABLE SALT
Student’s Name
Institutional Affiliation
Course
Instructor
Date
Formal Lab Report: Density of Aqueous NaCl Solutions
Date Performed: September 2023
Purpose
This experiment aimed to measure the density of various sodium chloride solutions with concentrations ranging from 2% to 20%, including two unknown concentrations labeled as UNKNOWN 1218 and UNKNOWN 12117. The objective was to determine the densities of these Aqueous NaCl Solutions to ascertain their respective concentrations. A specific technique involving weighing the solutions and measuring their volume was employed to measure the densities.
Modifications to the Procedure
No modifications were made to the experimental procedure as outlined in the laboratory manual. The instructions were followed precisely as written.
Data and Observations
The following table presents all the numerical raw data and observations collected during the experiment. All values include their respective units.
Table 1: Summary of the results obtained in the experiment
Solution

Mass of Beaker (g)

Mass of Solution (g)

Temperature (°C)

Density (g/mL)

Salt Concentration (%)

5% Salt

74.442

100.236

21

1.032

-

7% Salt

30.035

56.206

21

1.0479

-

10% Salt

31.025

57.589

21

1.063

-

15% Salt

30.260

57.617

21

1.094

-

20% Salt

30.949

58.945

20

1.120

-

UNKNOWN 1218

75.635

101.989

21

1.054

8.4%

UNKNOWN 12117

91.186

118.842

20

1.106

17%

No detectable odors were observed during solutions transfer, suggesting the absence of volatile compounds. Additionally, the temperatures of the solutions were documented to consider potential density variations dependent on temperature. The UNKNOWN 1218 solution displayed a density of around 1.054 g/mL, while the UNKNOWN 12117 solution had a density of approximately 1.106 g/mL. The absence of contamination or cross-contamination between solutions was observed thanks to color-coded pipettes and appropriate handling techniques.
Calculatio...
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