answers

watching

views

eiramLv1

18 Mar 2021

For example in a gravimetric experiment? What is the purpose of drying of the crucible before proceeding and
weighing it? What is the purpose of using the desiccator? Site of
any reason why we should add HCl to the sample before
precipitation; and why we should titrate the solution with analyte to
near boiling.

answers

watching

318

views

For unlimited access to Homework Help, a Homework+ subscription is required.

You have 0 free answers left.
Get unlimited access to 3.8 million step-by-step answers.

Get unlimited access

Already have an account? Log in

syedjunaidalishahhaideriLv2

23 Apr 2023

Unlock all answers

Get 1 free homework help answer.

Already have an account? Log in

You have 0 free answers left.
Get unlimited access to 3.8 million step-by-step answers.

Get unlimited access

Already have an account? Log in

Robert KubaraLv10

18 Mar 2021

Already have an account? Log in

Join us on Discord

Chemistry Study Group

Join now

Related questions

crimsontoad586

Questions are in the data analysis and this is my data

3. After setting up we measured the crucible to weigh 31.353 grams

4. next we measure the mass of the copper chloride hydrate mass using the weigh paper. It came out with a mass of 1.045grams.

Next we put the copper chloride in the crucible

After that we measured them all together and it weighed 32.4 grams.

5. We put the crucible on the clay triangle and did not tilt the lid be cause lab instructor told us not to

6. Next we sparked the flame to the Bunsen burner

7. Now with the Bunsen burner lit we are ready to observe. As the substance started to heat it up it started slowly to turn greenish and then was slowly turning brown. It is turning brown from the outside walls of the substance to the inside. After all the heating it slowly turned a little light brown, but brown.

8. Once heating is completed, turn off the equipment and allow the sample to cool.

a. Turn off the Bunsen burner.

b. Use a pair of crucible tongs to place the crucible on a wire mesh screen on the

bench.

c. With the tongs, move the lid so that it covers the crucible bottom completely.

Allow the sample to cool for about ten minutes.

9. Remove the crucible cover and carefully inspect the sample. If any of the sample has

maintained its initial appearance, reheat the sample until all of it has reacted.

10. After we allowed the sample to cool we then measured it and it had a mass of 32.222 g

11. next we are adding the deionized water to the cooled dried sample. We rinsed out the crucible and added it to the beaker with around a total of 16mL of DI water. Once initially added it was green on the bottom with precipitate was left on the bottom and blue on the top. After we stirred it now it is light blue and clear. It is just really light blue now and clear.

12. we obtained a piece of aluminum wire we coiled it and stirred it. Its turning from blue to greyish color and its fizzing and it getting warmer. After a little bit there is now copper on the bottom of the beaker. They are redish color and the solution on top is also a redish color.

13. we obtained 10mL of 6 M HCl solution. Next we dropped them in and the solution is fizzing again.

14. we put the filter paper on the filter paper and are now filtering the substance.

15. mass of dry watch glass 39.025 grams

16. 39.278 grams and second time was 39.274