U of S | Mailing List Archive | alt-photo-process-l | Re: potassium and sodium thiocyanate

Re: potassium and sodium thiocyanate

  • To: alt-photo-process-l@usask.ca
  • Subject: Re: potassium and sodium thiocyanate
  • From: Harlan Chapman <rs21592@gmail.com>
  • Date: Sat, 26 Sep 2009 21:49:22 -0700
  • Comments: alt-photo-process mailing list
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  • Reply-to: alt-photo-process-l@usask.ca
Chris,

Often potassium salts tend to be significantly more water soluble by weight than sodium salts. For example,
87g sodium thiocyanate will dissolve in 100ml water while 217g potassium thiocyanate will dissolve in 100ml water.
On the other hand, sodium and potassium hydroxide have roughly equal solubility in water so it is not a universal property.

The trend of often high potassium salt solubility can be useful sometimes though.

-Harlan