Rate of diffusion of methylene blue and red saffranin dye under three physical conditions

1. Rateofdiffusion of methylene blue and red saffranindye under three physical conditions Project Three SATURDAY SCIENCE ACADEMY

2. Group Members • Brandon Bell • Alicia Blakley • Isis Breadshaw • Deitra Clark • Cheryl Smith • Melvin Stewart

3. Objective To learn about the affect of temperature on the diffusion of dye molecules in a liquid medium. Heat energy excites molecules and increases the kinetics of molecular motion. In this exercise participants used ice-cold water, boiling water and normal tap water and recorded the time it took for the complete diffusion of the dye molecules in water under the above physical conditions..

4. Method • Two dye; saffranin and methylene blue were used in the experiment. • 100 ul of the dye were gently dropped in three 100 ml transparent plastic cup containing ice water, boiling water and tap water.

5. Method (Continued) • Time taken for equal distribution of the dye molecules across the medium was recorded for each observation.

6. Data

7. Data (Continued) Standard Deviation

8. The collected data were subjected to descriptive statistics on data.

9. Regress Time of diffusion of methylene blue dye on Temperature

10. Conclusion • The Dye methylen blue responded significantly in the three physical conditions. • Rate of diffusion was the least at ice water. • Fastest diffusion was observed in hot water.