• Support PF! Buy your school textbooks, materials and every day products Here!

I need help interpreting my results for a thermal decomposition lab

  • #1

Homework Statement


I performed an experiment recently, which required me to heat a flask and an unknown compound to constant weight. The unknown was supposed to be a mixture of calcium sulfate dihydrate and NaCl. My goal for this lab was to determine the % NaCl in the mixture. My percent error wasn't too bad: I got 12%. I'm just curious as to what could have contributed to this, especially since this error was consistent among the rest of my lab group. (Note: I was sure to completely transfer all of my compound to my flask). Does it have anything to do with the hydrate not being completely driven off?


Homework Equations


N/A

The Attempt at a Solution


N/A
 

Answers and Replies

  • #2
Borek
Mentor
28,398
2,800
unknown was supposed to be a mixture of calcium sulfate dihydrate
Composition of hydrates is often only approximate and depends on the temperature, humidity and sample history.
 
  • Like
Likes 1 person

Related Threads on I need help interpreting my results for a thermal decomposition lab

  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
1
Views
3K
  • Last Post
Replies
3
Views
5K
Replies
15
Views
2K
  • Last Post
Replies
1
Views
9K
  • Last Post
Replies
6
Views
1K
  • Last Post
Replies
1
Views
4K
  • Last Post
Replies
1
Views
2K
Top