Eiffusion is the movement of molecules from a higher to a lower concentration un

Question

Eiffusion is the movement of molecules from a higher to a lower concentration until equilibeium is achieved and the molecules are distribuned equally (hig. 4.5) At equilibrism, molecules may still be moving back and forth, but there is so net movement in any one direction 4.3 Diffusion Figure 4.5 Process of diffusion. ommon apparent when dye moleoules have equaly dspersed Crynal of dye in Dye molecue environment. The speed of diffusion is dependent on such factors as the Diffusion is a general phenomenon in the temperature, the size of the molecule, and the type of medium through which the molecules move. Experimental Procedure: Speed of Difusion Solute Diffusion Through a Semisolid Observe a petri dish containing 1.5% gelatin (or agar) to Potassilum pemanganate (KMnO) KWno, B which potassium permanganate (KMnO,) was added with combustible in the center depression at the beginning of the lab Obtain time zero from your instructor, and record time zero and the final time (now) in Table 4.2. What is the length What is the time in hours only? hrs. of time in hours and minutes? 3. Using a ruler placed over the petri dish, measure (in mm) the movement of color from the center of the depression outward in one direction: 4. Calculate the speed of diffusion 5. Record all data in Table 4.2 mm. mm/60 min-mm hr. Solute Diffusion Through a Liquid 1. Add enough water to cover the bottom of a glass petri dish 2. Place the petri dish over a thin, flat ruler. Position the petri dish directly over a mm measurement line. 3. With tweezers, add a crystal of potassium permanganate (KMnO) directly over the mm measurement line. Note time zero in Table 4.2 4. After 10 minutes, note the distance the color has moved. Record the final time, length of time in hours, and the distance moved in Table 4.2 5. Multiply the length of time and the distance moved by 6 to calculate the speed of diffusion: min hr. Record in Table 4.2. 4-7 Laboratory 4 Cell Structure and Function

Explanation / Answer

Diffusion is a process of movement of substances from higher concn to lower conc

For the speed of the experiment its immediate Immediately, a kind of red violet “halo” is formed around each small crystal. Because of its
color, the spreading of the “halo” away from the source can be observed easily. The
process is much faster in water.

The time duratio. Will be 1 mint 54 seconds approximately

The colonies grow 150 Mm outward when measured with a ruler

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