Can someone please send me a link or tell me what happens when the following reactions takes place? As in...the colour change (if any) and any other observations
* Phenol in water
* Phenol in excess water
* Phenol in hot water
* and then Phenol in hot water and then allowed to cool
* phenol, universal indicator and water
Phenol + Water=> phenoxide ion
other than that I'm not sure about the others.
phenol in excess water=> phenol reforms after the production of the phenoxide ion.
Phenol is moderately soluble in water at about 8 g /100 ml.
It forms clear colourless solutions in water.
For the last one the pKa of phenol is about 10.
To understand what happens in these reactions, it is important to have a basic understanding of phenol. Phenol is a compound that is commonly found in various applications, including dyes, medicinal products, and as an antiseptic. It is a white crystalline solid that is soluble in water to some extent. Phenol also has some acidic properties, which will be relevant in the reactions you mentioned.
Now, let's explore the reactions one by one:
1. Phenol in water:
When phenol is added to water, it will partially dissolve, resulting in a clear solution. The solution may have a slightly acidic pH due to the acidic nature of phenol. However, there may not be any significant color change or other noticeable observations.
2. Phenol in excess water:
If phenol is added to an excess of water, it will dissolve more readily, forming a clear solution. The excess water will help in increasing the solubility of phenol. Again, there may not be any color change or noticeable observations.
3. Phenol in hot water:
When phenol is added to hot water, it will dissolve more easily compared to room temperature water. This is because the solubility of phenol increases with temperature. Similar to the previous reactions, there may not be any significant color change or noticeable observations.
4. Phenol in hot water and then allowed to cool:
If phenol is dissolved in hot water and then allowed to cool, the solubility of phenol decreases. As a result, some of the phenol may precipitate out of the solution, forming small crystals or a cloudy appearance. This process is similar to how sugar dissolves in hot tea but crystallizes out as the tea cools down.
5. Phenol, universal indicator, and water:
When phenol is mixed with universal indicator (which contains a mixture of pH indicators), the acidic properties of phenol may cause a color change in the solution. Phenol, being mildly acidic, may turn the solution slightly acidic or cause a change in the pH, leading to a color change in the universal indicator. The exact color change will depend on the pH level of the solution.
Please note that the observations mentioned above are general and may vary based on the concentration of phenol and other specific conditions. Conducting the experiments yourself under controlled conditions will provide more accurate and detailed observations.