determine melting point of given organic compound urea.
Answers
Answer:
The melting point of urea - 133 C
Explanation:
o Weigh roughly 1 mg of urea and transfer it to a clean watch glass. Crush the urea to a powder. Load the powder into a capillary tube as before.
o Attach the capillary to the thermometer with the rubber band. Heat the oil bath to 110°C, which is about 20° below the reported melting point of 132°C for urea.
o Insert the thermometer and capillary tube into the oil bath. Heat the bath to about 125°C at 5°C/min while watching the capillary.
o When the bath reaches 125°C, heat the bath by 1 – 2°C /min. Record the temperature when the first drop of liquid appears and when the last bit of solid melts.
o Turn off the hotplate and remove the capillary and thermometer from the oil bath to allow them to cool.
By this way, we can find the melting point of any given organic compound including urea in the similar way.