This is my prelab questions. I need help :( 1.How is the empirical formula affec

Question

This is my prelab questions. I need help :(

1.How is the empirical formula affected if:

a.the sample was not completely dehydrated during heating?
b.copper metal precipitate was lost during the filtration process?
c.the copper metal was not completely dry when you weighed it?

2.Does your experimental empirical formula support the results of the actual chemical formula obtained from the average of the class data? What could be the cause of any discrepancy?

3. If you had a sample of a Cobalt(II) chloride hydrate that had been dehydrated what would you do to be sure that the sample was in fact anhydrous?

4. Why do you think the copper is rinsed with acetone?

5. How would you write the compound barium chloride dihydrate?

Explanation / Answer

1 (a) If the sample is not completely dehydrated during heating then it will weigh more than actual and the % of elements other than H and O will decrease than the actual value.

(b) % of copper will be lower

(c) If copper metal was not completely dry when you weighed it, it means you are actually weighing less amount of copper than is shown. So at the end of the analysis you will end up with low copper value

2. The results are not provided in the question

3. store the sample in a decicator

4. To get rid of any grease

5. BaCl2.2H2O

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.