Chemistry Solubility

3033 Words13 Pages
Jacinta Houng
Comparing the Solubility of Chemicals in Water
“Water is known as the “universal solvent” because so many different substances dissolve in it and we rely on this for many of our daily needs.”
Introduction: Water is known as the ‘universal solvent’ as it is capable of dissolving a variety of different substances and dissolves more substances than any other liquid. However the ability to be soluble depends on a substances polarity and bonding. This then contributes to the various ways that different types of chemicals interact in water.

Solubility is crucial to every living thing on earth as water can carry along valuable chemicals, minerals, and nutrients necessary for survival. In fact Water covers 70% of the Earths
…show more content…
However despite its name as the "universal solvent" there are many compounds that won't dissolve or won't dissolve well in water. If the attraction is high between the opposite-charged ions in a compound, then the solubility will be low. For example, most hydroxides exhibit low solubility in water.

Polar molecule: H2O
Polar molecule: H2O

Aim: To investigate and compare the solubility of household chemicals in water to demonstrate the various ways that the different types of chemicals interact in water.

Hypothesis: Substances with stronger bonds such as ionic bonds will have a low solubility whereas substances with weaker bonds like covalent bonds will be highly soluble. Therefore sugar will have the highest solubility followed by citric acid and then salt.

Materials: * Citric Acid * Salt * White Sugar * 600ml of water * 1 Thermometer * 1 Stirrer * 1 tablespoon * 3 transparent cups * 1 Measuring jug * Pen * Paper

Risk Assessment: A common laboratory risk is the handling of glass items. Items such as thermometers and glass cups carry the risk of breakage, cuts and mercury poisoning. Ways to minimize and handle this risk include: * Inspect glassware for defects or cracks before use. * Do not handle broken glass with bare hands. Use appropriate cut-resistant gloves to handle broken glass. * Use forceps, tongs, scoops, or other mechanical devices for removing
Open Document