BY: ARIANA RANDOLPH & ZACH STEINBAUGH

Do Various Temperatures Effect Osmotic Rate?

Hypothesis: If

boiling water/

the highest

increase in

temperature is

used the

osmotic rate

will increase.

Procedure

Data

Original Core Mass (g)

After Core Mass (g)

Percent Change in Mass (g)(after-original/after *100)

Number 1: freezer4.4 g

4.75 7.368

Number 2: fridge4.4 g

4.7 6.38

Number 3: room temperature4.4 g

4.55 3.297

Number 4: boiling water4.4 g

4.73 6.977

BeforeBefore AfterAfter

Pictures

Descriptions

Number 1: freezer

Number 2: fridge

Number 3: room temp.

Number 4:Boiling water

•Felt cold/icy•Hardened from temp•Could tell that water had been absorbed

•Felt cold/but not icy•Slightly harden•Could tell that water had been absorbed

•Same hardness as before•Could tell that water had been absorbed

•Lightened in color•Softened•It appeared that the most water had been absorbed

Conclusion

The purpose of the experiment is to conclude if various temperatures effect the osmotic rate.

Our data resulted in number 1(freezer) changing mass by 7.368%, number 2(fridge) changing mass by 6.38%, number 3(room temp) changing mass by 3.297%, and number 4(boiling changing by 6.977%.

It was originally predicted that boiling water would increase the osmotic rate, therefore our hypothesis was rejected because our data shows that the highest increase in osmotic rate was caused by a freezing temperature.

Explanation

We learned: That the results should have proved the hypothesis; the warmer the salt solution the

higher the osmotic rate. Because our data disproved the hypothesis it has been concluded that time was a key variable. In order to correct

the data, diffusion needs to take place for a duration of time starting at 1 hour up to an

overnight experiment.

Osmotic rate is directly related to diffusion of molecules and how diffusion starts with-in a

single cell