Preview

Chemical Diffusion Lab Report

Satisfactory Essays
Open Document
Open Document
478 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Chemical Diffusion Lab Report
Biology Lab #1: Chemical Diffusion

Purpose

To discover how the size of a cell affects the diffusion of chemicals throughout the cell.

Hypothesis

I predict that as the cell size increases the diffusion depth and the diffusion rate will decrease.
Equipment

• Eye protection • 250 mL beaker • Timing device • Scoopula • Ruler • Scalpel • Sodium hydroxide solution • 3 different sized cubes of phenolphthalein agar • Paper towels
Purpose

1. Put on eye protection 2. With the scalpel cut the block of phenolphthalein agar in to a 1x1x1 cm cube (Cube A), a 2x2x2 cm cube (Cube B) and a 3x3x3 cm cube (Cube C). 3. Pour enough sodium hydroxide solution in to the beaker to cover the …show more content…
Place Cube A into the sodium hydroxide solution for 10 minutes. Make sure all sides of the cube come in contact with the solution. 5. After 10 minutes remove the cube with the Scoopula. 6. Carefully cut Cube A in half with the scalpel. 7. Where the sodium hydroxide diffused into the cube, the agar will have turned pink. Measure how far the colour change extends into Cube A. Record this measurement in you table. 8. Repeat steps 4-7 for Cube B and Cube C
Observations of Three Phenolphthalein Agar Cubes in Sodium Hydroxide Solution

|Cube |Surface |Volume (cm ) |Surface Area to |Diffusion Depth |Diffusion Rate |
| |Area (cm ) | |Volume ratio | | |
|A |6 cm |1 cm |6 |1 cm |0.1 cm/min |
|B |24 cm |8 cm |3 |0.2 cm |0.02 cm/min |
|C |54 cm |27 cm |2 |0.1 cm |0.01 cm/min |
Continue Reading
View Writing Issues

You May Also Find These Documents Helpful

  • Good Essays

    5.05 Mixtures and Solutions Lab Report
    • 815 Words
    • 3 Pages

    5.05 Mixtures and Solutions Lab Report

    1. I cut 2 strips of coffee filter paper to 3 cm by 9 cm.…

    • 815 Words
    • 3 Pages
    Good Essays
    Read More
  • Good Essays

    Ap Bio Lab Report Osmosis
    • 850 Words
    • 4 Pages

    Ap Bio Lab Report Osmosis

    When a substance is released into an area, the random movement of its molecules results in a multitude of collisions. These collisions, in turn, lead to a dispersion of the molecules. The overall movement of the molecules will be from an area of high concentration, where there will be more collisions, to areas of low concentration, where the number of collisions will be much less. This process of dispersion will continue until there is no net gain or loss of molecules in an area. The process by which this equilibrium occurs is called diffusion. Diffusion is vitally important to biology on many levels; individual cells, organelles, and even whole organisms rely on diffusion to carry out the processes essential to life. One especially important aspect of diffusion is osmosis, or the diffusion of water. This often occurs across a semi-permeable membrane…

    • 850 Words
    • 4 Pages
    Good Essays
    Read More
  • Good Essays

    Osmosis And Diffusion Lab Report
    • 468 Words
    • 2 Pages

    Osmosis And Diffusion Lab Report

    Diffusion is the molecular net movement from a higher concentration to a lower concentration. For instance, when a person is smoking, the smoke diffuses into the air. The molecules in the smoke, released from the cigarette, travel through the air. Here is how it occurs. When molecules are close enough, they collide with each other, their kinetic energy changes. Due to the direct relationship between diffusion and molecular kinetic energy, the molecules move away from the point of the collision as their kinetic energy is redirected. Therefore, molecules always tend to distribute themselves throughout the area they stay. It continues until dynamic equilibrium is reached, that is, no net movement happens. Molecules at that time are still in motion, but the amount of molecules moving in one direction equals to the amount of molecules moving in the other direction.…

    • 468 Words
    • 2 Pages
    Good Essays
    Read More
  • Good Essays

    Agar Cubes Lab Report
    • 560 Words
    • 3 Pages

    Agar Cubes Lab Report

    -Immerse the 3cm clear cube in the pink Potassium manganate (K2MnO4 ) and the pink agar cube in the clear Hydrogen…

    • 560 Words
    • 3 Pages
    Good Essays
    Read More
  • Powerful Essays

    Cellular Respiration Lab
    • 1049 Words
    • 5 Pages

    Cellular Respiration Lab

    The cell membrane is the selectively permeable barrier whose total surface area is important in regulating the substances that diffuse into or out of the cell. However, as a cell grows in size, its volume increases at a greater rate than its surface area. Consequently, the surface area of the growing cell soon becomes inefficient for effective diffusion throughout the cell. This relationship between surface area and the volume of a cell can be expressed as a ratio; and the need for an effectively large surface area to volume ratio is considered to be the most significant factor in triggering a cell to divide, and therefore, determining cell size.…

    • 1049 Words
    • 5 Pages
    Powerful Essays
    Read More
  • Satisfactory Essays

    The Effects of Surface Area to Volume Ratio in Agar
    • 446 Words
    • 2 Pages

    The Effects of Surface Area to Volume Ratio in Agar

    If you increase the surface area of a cell relatively to its volume, then the diffusion time will decrease.…

    • 446 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Good Essays

    Scientific Method( Diffusion Lab)
    • 713 Words
    • 3 Pages

    Scientific Method( Diffusion Lab)

    Experiment: At this experiment we are investigating does the temperature affect how quickly the particles diffuse to an even concentration throughout the water, we are going to do this experiment by using food coloring to see how quick the food coloring diffuse in hot water and cold water.…

    • 713 Words
    • 3 Pages
    Good Essays
    Read More
  • Good Essays

    Analysis of an Antacid
    • 650 Words
    • 3 Pages

    Analysis of an Antacid

    7. Titrate antacid mixture with the NaOH solution until we have reached the end point of…

    • 650 Words
    • 3 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    Chemistry of life
    • 453 Words
    • 2 Pages

    Chemistry of life

    When an acid is dissolved in water, there are more hydrogen ions(H+) present than hydroxyl ions(OH-) due to the fact that acids donate hydrogen ions. An alkaline or basic solution accepts hydrogen ions. As a result, it has more hydroxyl ions in solution. Using the pH scale, pure water is neutral with a pH of 7. Acids range from 1-6, with the strongest acid having a pH of 1. Alkaline substances range from 8-14, with 14 the value of the strongest base. When an acid is strong, like hydrochloric acid, the hydrogen ions will disassociate themselves more completely from the chlorine atoms in solution. A weaker acid will have less hydrogen ions in solution.…

    • 453 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Powerful Essays

    Agar Cube Lab Report
    • 969 Words
    • 4 Pages

    Agar Cube Lab Report

    Hypothesis: I expect to find that when the surface area to volume of a cell reaches a certain level, diffusion alone won't be able to supply the cell materials needed, and as single-celled organisms take in and release substances by means of diffusion across the cell membrane, this process limits cell size. I predict that as the rate of diffusion will be too slow to deliver materials to the center of the cell in the larger cells, it could result in cell malfunction.…

    • 969 Words
    • 4 Pages
    Powerful Essays
    Read More
  • Better Essays

    Agar IB Lab DCP Practice 2015 DP
    • 2400 Words
    • 13 Pages

    Agar IB Lab DCP Practice 2015 DP

    As both the solution and the agar are colourless I will use agar that had before been mixed with phenolphthalein. Phenolphthalein is a solution used as an indicator often used in titration focused labs. This is because it helps identify acidic and basic solutions, as phenolphthalein will either turn pink in basic solutions or colourless in acidic solutions. This will help us observe diffusion, in our lab because the agar cubes- which have been made with phenolphthalein, and is evenly distributed through the entire agar cube. When the agar cube comes in contact with Sodium Hydroxide (NaOH) it will turn pink, and will continue to do so as diffusion occurs, and the Sodium Hydroxide solutions begins to be absorbed into the agar cubes, allowing us to later identify the distance the Sodium Hydroxide solution travelled over time.…

    • 2400 Words
    • 13 Pages
    Better Essays
    Read More
  • Good Essays

    van Deemter equation
    • 783 Words
    • 3 Pages

    van Deemter equation

    where Hp is the HETP arising from the variation in the zone flow velocity, dp is the particle diameter (average), and is the constant which is almost close to 1.…

    • 783 Words
    • 3 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    Which Gas, Ammonia or Hydrogen Chloride, Diffuses Faster?
    • 404 Words
    • 2 Pages

    Which Gas, Ammonia or Hydrogen Chloride, Diffuses Faster?

    * The cotton wool was placed at one end of the glass tube using tweezers. Seal it off with a rubber bum.…

    • 404 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Powerful Essays

    Lab Report Gas Diffusion
    • 3047 Words
    • 13 Pages

    Lab Report Gas Diffusion

    ❖ Welty, J. R. & Wicks, C. E. (1984), Fundamentals of Momentum, Heat and Mass Transfer, J. Wiley.…

    • 3047 Words
    • 13 Pages
    Powerful Essays
    Read More
  • Satisfactory Essays

    Chemistry Ia Ib
    • 636 Words
    • 3 Pages

    Chemistry Ia Ib

    2. In a clean conical flask, pipette out 25.00ml of sodium hydroxide solution and add 1-2 drops of the phenolphthalein indicator.…

    • 636 Words
    • 3 Pages
    Satisfactory Essays
    Read More

Related Topics