Contact Us
Sign In / Sign Up for FREE
Go to advanced search...

Lab 2 - Essay Example

Comments (0) Cite this document
pH Values of Common Household Items Compare and contrast acids and bases in terms of their H+ and OH- ion concentrations. All substances can be classified into acids, bases and neutral depending on their ionization trends when dissolved in water. Acids produce a greater number of H+ ions which can be explained by the fact that acids give up a H+ ion on reaction with water forming an H3O+ ion…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER95.1% of users find it useful
Lab 2
Read TextPreview

Extract of sample "Lab 2"

Download file to see previous pages Bases cause the litmus to turn blue. Strength of a base is dependent on concentration of OH- ions produced. On the pH scale, basicity of a substance increases from 7 to 14: 7 being neutral and 14 being strongest base (one that generates maximum OH- ions when dissolved). Name two acid and bases that you often use. Acids: Milk, Orange Juice Bases: Soap, Tooth paste Cube Dimensions Surface Area (cm2) Volume (cm3) Surface Area : Volume Time Required for Complete Color Change Distance of Diffusion 1 cm X 1 cm X 1 cm 6 1 6:1 3 min 0.50 cm 1 cm X 2 cm X 2 cm 16 4 4:1 2 min 50 sec 0.30 cm 1 cm X 1 cm X 6 cm 36 6 6:1 2 min 42 sec 0.48 cm How did the surface area effect the diffusion of the cube? What about the volume? What about the surface area to volume ratio? Which of these had the greatest effect on the diffusion of the cube? Time required for complete color change is found to be approximately same for all three cubes (average time: 2 minutes 50 seconds) which concludes that rate of diffusion of vinegar into the agar is same irrespective of shape and size. Further, volume had no impact on the time required for color change. No regular trend has been observed for distance of diffusion of vinegar inside the agar with respect to surface area or volume, when each is considered alone. Ideally, greater distance of diffusion should have been found in Cube B ( 1 cm X 2 cm X 2 cm) as compared to Cube A ( 1 cm X 1 cm X 1 cm) as it has the greater surface area (larger surface area enhances amount of diffusion); however, the irregular pattern reveals that there is a third factor that has a direct bearing on the distance of diffusion. Studying the results of the experiment, it becomes evident that surface area to volume ratio is the single parameter that majorly affects the amount of diffusion of vinegar into the agar. Cube A ( 1 cm X 1 cm X 1 cm) and Cube C (1 cm X 1 cm X 6 cm) having same surface area to volume ratio yield the same distance of diffusion. On the other hand, cube B ( 1 cm x 2 cm x 2cm) tails at 0.3 cm. Even though greater amount of vinegar diffuses in to cube B than in cube A due to greater surface area, a larger time period is required for it to reach the center. In conclusion, the experiment demonstrates that depth of diffusion is lesser for materials having smaller surface areas to volume ratio than that with higher surface area to volume ratio. How does this experiment demonstrate the need for larger cells to divide? A cell meets its requirements for growth, repair and removal of waste materials through its cell membrane, the amount of transfer directly relating to its surface area. More so, the extent of movement of substances into a cell-towards its center- depends upon its size and volume. An increase in cell size is accompanied with an increase in requirements of the cell. More nutrients need to be diffused in and a greater amount of waste materials require to be diffused out. Consequently, a mechanism needs to be established that would allow a rapid transfer of substances through the cell membrane. As the cell is grows uncontrollably without division, the surface area to volume ratio decreases. This limits the distance to which substances diffuse into the cell, posing a restriction to the functionality of various components of the cell-especially those located towards the center. To counter this, it ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
(“Lab 2 Essay Example | Topics and Well Written Essays - 1250 words”, n.d.)
Retrieved from
(Lab 2 Essay Example | Topics and Well Written Essays - 1250 Words)
“Lab 2 Essay Example | Topics and Well Written Essays - 1250 Words”, n.d.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document


Lab 2 (McNamara, 1991). The last action that was carried out was t compare the trials were gestalt was and was not presented. It should be noted that the whole process was computerized such that detection of any change could be tracked to detect the stimuli affected. The analysis of variance was then used to analyze the findings (Coren & Girgus 1980). Results The results were as shown below Based on the 2 X 5 Repeated measures ANOVA, it was found that the main effect of gestalt presence F (1, 32) = 15.637, p < .001. On the other hand, the main effect of stimuli change F (4,128) = 45.358, p < .001. By combining and correlating the two, it was found that the significant interaction between gestalt presence and stimuli change...
3 Pages(750 words)Lab Report

Clostridium Botulinum (Microbial form and function)

9 Pages(2250 words)Essay

LAB 2 Classical Experiment

...Soc 465: Social Science Research Lab 2: ical Experiment Topic: Television Advertisements and Product Sales Identify the necessary components This study will entail looking at the buying patterns of adults in the community. Random products will be selected to determine whether or not, specifically, advertising on television causes people to buy more of the product, or whether there are other factors that have more significance in determining which product adults buy. The necessary components, then, are a survey instrument, access to a selected panel of adults, and research about which products to include in the questionnaire. 2) What is the research question? The overarching question...
2 Pages(500 words)Lab Report

Lab#2 concrete mix design and compression tests

... 40620 45910 36280 Ultimate stress (psi) 6450 5750 6490 5130 Type of Fracture columnar local shear wedge columnar cone splitting Table 1: Laboratory strength test results The ultimate load represents the load sustained by the concrete compression cylinder just before failure. The targeted compressive strength is higher than the mix design strength to ensure that the concrete material surpasses its performance expectations for adequate load bearing capacity. The graph below shows the values of W/C plotted against the average design mix strength obtained from the laboratory experiment. Figure 2: Graphical relationship between water-cement ratio and compressive strength as obtained from the lab experiment. Strength in concrete refers... -2014 ...
10 Pages(2500 words)Lab Report

BIO100A Home Lab 2

...of the mollusca phylum and earthworm of the annelida phylum were studied and the body parts of the snail and earthworm were identified. The body segments were identified for snail and earthworm. Lab Answers: Lab 7A: Fungi 1. List four ways that Fungi are similar to plants. They share similar cell structures. They are eukaryotic organisms. They can reproduce through both sexual and asexual reproduction. Water is required by both fungi and plants to live and survive. All the organelles are wrapped inside the cell wall in both fungi and plants. Fungi and plants are immobile. 2. List four differences between Fungi and plants. Fungi cannot do photosynthesis but plants can do. Fungi are...
8 Pages(2000 words)Lab Report

Lab 2: Modifying a Database Design in Visio

...Creating a Database Design in Visio Unit This paper talks about the degree to which Visio diagram reflects the database design. It also entails the assumptions about business rules in order to create a Visio diagram and its relations. Key Words: Entity relation diagram, database, Visio, schema Creating a Database Design in Visio Drawing an entity-relationship diagram helps understanding of an organizations required data needs and can be used to represent a schema for the required database design of the system. a) The degree to which Visio diagram reflect the database design. Visio is a Microsoft tool that is used for the conceptualization and construction of entity relationship diagrams. The Visio diagram in this context hence... a...
2 Pages(500 words)Assignment

Geomorphology Lab 2

...Introduction The onset of radio-carbon dating has made it possible to precisely determine the age of an organism which formerly lived. Through taking the ratio of carbon-12 to carbon-14 in a particular sample and then benchmarking it to the living organism’s ratio, an individual is able to determine the age. In which case, another important aspect applied is half-life, which is the time taken by half of the sample to decay and is denoted by t1/2. Objective This lab was designed specifically, with a major objective of developing a more comprehensive and hands-on understanding of radiocarbon dating. From this, the specific goals are as follows: Understand half-life and radio-carbon dating Know the...
2 Pages(500 words)Lab Report


... Electrical Resistance Strain Gages A strain is the motion of particle displacement when a material experiences an external force. Under a typical extensional strain, strain is the measure of a movement when adjacent particles in a body undergo a displacement due to external loading. Mathematically, the strain is a non-dimensional parameter calculated by dividing the change in length by the original length. The mathematical formula is presented as follows Normal Strain; however, since the strain is minuscule, it is defined as microstrain (µɛ). Direct measurement of strain is impossible; therefore, other approaches are required to facilitate the calculation. Specifically, the most common and accepted method of measuring strain... Electrical...
1 Pages(250 words)Essay

Unit 1 Lab 2 Using Command Line Help

...Using Command Line Help Insert Insert The man command is used to display on-line man pages for any of the hundreds of UNIX commandsthat are available. The basic form is the man name where name is the name of the command for which the user wants information. Enter the following command: $ man cal a. What kind of calendar does the cal command display? The cal command displays a simple date showing the dates of the current month and the year (Shotts, 2012). For example, in this case, it shows March, the days in March and the year 2015. b. What is done to see the calendar for the year? Use the command cal –y and cal –y 2015 to display the calendar for the year 2015 c. What is displayed if no year is? The calendar... Command Line...
1 Pages(250 words)Case Study

Science Lab 2

...Science Lab 2 Science Lab 2 Introduction Speciation is the natural change in a species’ behavior and prevalence over a given periodfollowing a natural disturbance. This disturbance often cause of the species to locate to a different natural setting forcibly and almost immediately. In effect, the species is compelled to adapt and change to fit these new natural surroundings. The following lab report methodically accounts for the series of events following the sudden split of a species of lizards into two groups by a hurricane resulting in the isolation of a small group of individuals on an island far from the mainland. Hypothesis/Predicted Outcome Ecological conditions result in the natural selection of coloration in visits while... Lab 2...
1 Pages(250 words)Lab Report
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.

Let us find you another Essay on topic Lab 2 for FREE!

Contact Us