My ideas for a research question are as follows: Solubility, Density and Corrosion. We are covering the solubility of substances in water later this term so this seems to be the obvious choice. Factors that affect solubility in water include: temperature, polarity, alkalinity and and saturation level of water.
The density of water varies with it's temperature, a unique property of water is that is is less dense in it's solid form than as a liquid.
Corrosion occurs in most metals, when they are exposed to water for and extended period of time. This may be a difficult topic for an experiment as factors other than water also influence corrosion which makes controlling variables difficult.
From this, it seems clear that solubility is the easiest property of water to test.
The density of water varies with it's temperature, a unique property of water is that is is less dense in it's solid form than as a liquid.
Corrosion occurs in most metals, when they are exposed to water for and extended period of time. This may be a difficult topic for an experiment as factors other than water also influence corrosion which makes controlling variables difficult.
From this, it seems clear that solubility is the easiest property of water to test.
So what factor affecting solubility will you investigate? You could look at solubility and precipitation of salts - something like scale deposition in pipes. You could look at gas solubility (going 'flat'). Perhaps you could do something to do with salinity in water/soil. What else?
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