Refined version

Topic and general idea of investigation approved, refining needed however.

REVISED EDITION:

My main research idea is to try and investigate the common theory of ‘like dissolves like.’ Although this theory has been chemically proven numerous times, it is my goal to investigate the effects of temperature and mixing various substances to discover any possible grey areas.

General Hypothesis- All substances will be slightly more soluble in water when heated. The mixtures of the oil and the two types of alcohol over heat will create a greater polarity and consequently solubility in water. The soap will mix with the oil and alcohols to  increase their solubility.

Part 1:

Investigate:

1) Oil (hydrocarbon)

2) Ethanol (Alcohol)

3) Butanol (Alcohol)

4) Salt (Ionic & Polar)

 

- Investigate the solubility of the above liquids and solid in water after the liquid has been heated over a constant temperature of 50 degrees.

- In the repeat test heat water to the same temperature instead of the liquid, add the liquid and salt and compare the results (i.e. the time it takes to dissolve).

Part 2:

Mix:

1) Oil (hydrocarbon) + Ethanol (Alcohol)

2) Oil (hydrocarbon) + Butanol (Alcohol)

2) Ethanol (Alcohol) + Salt (Ionic & Polar)

3) Salt (Ionic & Polar) + Oil (hydrocarbon)

 

-These are mixed over a heat of 50 degrees before they are added to the water to investigate the effect of temperature and mixing the substances together on their solubility in water.

Part 3:

- Add liquid soap to:

1) Oil (hydrocarbon)

2) Ethanol (Alcohol)

3) Butanol (Alcohol)

- Investigate whether the mixing of soap with these substances for 2 minutes impacts the solubility of the substance in water.

Research/ Investigation idea: Polar vs. non-polar solubility

Why does water dissolve some substances and not others?

Purpose: To monitor different substances solubility in water, and then investigate whether temperature and reactivity (between substances) affect the overall solubility. 

Investigate:

1) Oil (hydrocarbon)

2) Ethanol (Alcohol)

3) Salt (Ionic & Polar)

General Overview:

- Add each of these substances to water to investigate their solubility. Use the same volume of water, and dye the liquids so as to measure the amount of time to mix with the water. Monitor the dissolution rate in increments of 5 seconds (some substances may take longer). If the substance does not mix after one minute, observe where it goes. Repeat these processes again, though stir the liquid instead of leaving it to sit.

                - To measure the volume of the substance in the case that it is not soluble or does not completely dissolve in one minute,

- For the second stage of the experiment, investigate the solubility of the above liquids in water after the liquid has been heated over a constant temperature of 50 degrees. Then in the repeat test heat water to the same temperature instead of the liquid and compare the results.

- Then, for the third stage of the experiment, mix:

1) Oil (hydrocarbon) + Ethanol (Alcohol)

2) Ethanol (Alcohol) + Salt (Ionic & Polar)

3) Salt (Ionic & Polar) + Oil (hydrocarbon)

These are mixed over a heat of 50 degrees before they are added to the water to investigate the effect of temperature and mixing the substances together on the water’s ability to mix with them.

 

How will I accurately measure the volume that doesn't dissolve?

EEI

Task sheet Received 22/04/13