What is the Salol experiment?
The Experiment Salol (phenyl salicylate) melts at about 45ºC and solidifies rapidly at room temperature. The sizes of the crystals formed are very different depending on the rate of the cooling. In this experiment, three small amounts of salol are placed on warm watch glasses and allowed to cool at different rates.
How long does it take for Salol to melt?
Put some salol and a thermometer into a boiling tube. Put the boiling tube in a hot water bath. Allow the salol to melt and reach the temperature of the hot water. Measure and record the temperature of the salol every minute for about 20 minutes, stirring briefly to evenly mix the hot and cold parts.
What happens to the atoms when the Salol cools?
This happens because the salol cools most slowly on the hottest slide, so the molecules take longer to crystallise. The crystals form because the salol molecules line up alongside each other in a regular pattern and form bonds between each other.
How does cooling time affect crystal size?
Temperature affects crystal size. The quicker a substance cools, the smaller the crystals will form because the molecules within that substance have a shorter time to arrange into a fixed, ordered pattern.
What is the chemical name of salol?
Phenyl salicylate
Phenyl salicylate is a benzoate ester that is the phenyl ester of salicylic acid. Also known as salol, it can be formed by heating salicylic acid with phenol and is used in the manufacture of some polymers, lacquers, adhesives, waxes and polishes.
How do you melt salol?
Preparation of Salol samples and slides: Salol samples are best prepared using a water bath set at a temperature which will just melt the Salol (around 45oC).
What is the freezing point of salol?
106.7°F (41.5°C)Phenyl salicylate / Melting point
Does rapid cooling have no or small crystals?
Extrusive igneous rocks cool much more rapidly than intrusive rocks. The rapid cooling time does not allow time for large crystals to form. So igneous extrusive rocks have smaller crystals than igneous intrusive rocks. Extrusive igneous rocks are also called volcanic rocks.
Why does fast cooling produce small crystals?
If the magma cools quickly, the crystals do not have much time to form, so they are very small. If the magma cools slowly, then the crystals have enough time to grow and become large. The size of crystals in an igneous rock is an important indicator of the conditions where the rock formed.
How do you convert phenol to salol?
React phenol with NaOH for getting the sod. phenoxide ion. The product formed in the step 2 becomes salol or the salicylic acid due to the presence of the diluted hydrochloric acid. In this way we can make salol from phenol.
What is the boiling point of salol?
343.4°F (173°C)Phenyl salicylate / Boiling point
Which cools faster magma or lava Why?
Why does magma usually cool more slowly than lava? Intrusive igneous rocks cool from magma slowly because they are buried beneath the surface, so they have large crystals. Extrusive igneous rocks cool from lava rapidly because they form at the surface, so they have small crystals.
How do you use a salol sandwich experiment?
The experiment works best when a drop of molten Salol is sandwiched between two microscope slides. One pair should be cool (if too cold, then the salol crystallises before the sandwich is completed) and the other pair should be warm (can use a water bath – but wipe dry before use, or leave on a warm radiator).
How to prepare salol samples and slides?
Preparation of Salol samples and slides: Salol samples are best prepared using a water bath set at a temperature which will just melt the Salol (around 45oC). A class set of test tubes, each around ¼ full of Salol is needed, each with a glass rod inserted, so that the rod is also at the temperature of the Salol.
How do you measure the temperature of a salol?
Put the boiling tube in a hot water bath. Allow the salol to melt and reach the temperature of the hot water. Take the boiling tube out of the hot water. Measure and record the temperature of the salol every minute for about 20 minutes, stirring briefly to evenly mix the hot and cold parts. Plot a graph of temperature against time.
How do you find the cooling curve of salol?
To investigate its cooling curve: Put some salol and a thermometer into a boiling tube. Put the boiling tube in a hot water bath. Allow the salol to melt and reach the temperature of the hot water. Take the boiling tube out of the hot water.