Food Hot Plate vs Science Hot Plate

  • Thread starter mishima
  • Start date
  • #1
543
33
"Food" Hot Plate vs "Science" Hot Plate

I want to pick up a cheap hot plate for doing high school level demonstrations in chemistry. Is there any reason getting a normal hot plate would be a bad idea? Like this one?

Thanks.
 

Answers and Replies

  • #2
chemisttree
Science Advisor
Homework Helper
Gold Member
3,604
632


From a customer review for the cheap hot plate on Amazon.

...the included thermostat only very roughly controls the temperature and allows it to fluctuate wildly.

That never happens with the $200 "science" hot plates I have used.
 
  • #3
543
33


Will that matter much for high school level demos and experiments? Stuff like turning a penny into bronze by heating zinc sulfate, etc. Thanks.
 
  • #4
chemisttree
Science Advisor
Homework Helper
Gold Member
3,604
632


Only you know the answer to that. Read some other reviews that describe it working for 2 weeks and then... KAPUT.
 
  • #5
543
33


Well, I mean, how often do you really need a consistent heat source? What sort of things is it critical you don't have heat fluctuations? I'm coming from a lack of upper level chemistry experience/lab classes.
 
  • #7
chemisttree
Science Advisor
Homework Helper
Gold Member
3,604
632


Exactly. Imagine you want to boil something flammable with this hotplate. You keep increasing the setting but it isn't boiling. You wait. And wait. Nothing is happening. You increase the setting a little further and WHAM. The hotplate goes into overdrive, overheating the solvent which boils with such force that the glass joints are blown apart and the apparatus falls to the floor. The boiling solvent fills the air with a cloud of flammable vapor, searching for a source of ignition.

Safety and control are priceless.
 

Related Threads on Food Hot Plate vs Science Hot Plate

Replies
5
Views
3K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
4
Views
11K
  • Last Post
Replies
1
Views
6K
  • Last Post
Replies
8
Views
31K
  • Last Post
Replies
15
Views
7K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
7
Views
6K
  • Last Post
Replies
5
Views
8K
Top