To calculate the percentage composition of the mixture of Na2CO3 + NaHCO3
Chemistry lab report 4
Aim – To calculate the percentage composition of the mixture of
Na2CO3 + NaHCO3
Procedure
- Weigh a perfectly dry crucible with properly fitted lid.
- Weigh the crucible with 1 gram of the mixture.
- Heat the crucible with a partially open lid for 10 minutes with low flame and gradually increase the flame.
- Keep heating for 30 minutes.
- Place the crucible to a dessicator.
- Weigh the cooled crucible and note it down.
Equipment used –
- Crucible
- Weighing machine
- Dessicator
- Bunsen burner
- Tripod stand
- Lighter
- The mixture
Qualitative analysis –
- The cooling process was time consuming.
- When the heating started, there were some fumes evolved.
- In the middle of the process of heating some orange colour deposits could be seen in the tripod stand.
- It was hard to keep the lid of the crucible partially open, as it was not balancing perfectly.
- The crucible turned very hot, thus it was hard to place the crucible in the dessicator.
- The vaseline wasn’t very sticky, thus the lid of the dessicator wasn’t very tight.
- Once the crucible was placed inside the dessicator, it was difficult to keep the lid partially open as it was too hot to touch and one had to use holder.
