Solubility of Sodium Sulphate

Perusing my CRC the other day, I noticed that sodium sulphate heptahydrate has a solubility of 19.5g/100cc. The anhydrite has a
solubility of 4.76g/100cc. At a concentration of say 18 g/100cc why doesn't the heptahydrate crystallise out as the anhydrite then reabsorb water into its structure to become the heptahydrate and then redissolve? The respective MWs of 142 and 268 don't account for the discrepancy. Any ideas?
Add pictures here
✖
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
snipped-for-privacy@hotmail.com wrote:

The last time I needed to know a solubility I found that the CRC had taken its data from an ancient reference and it was out by a factor of more than 10.
Add pictures here
✖
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Site Timeline

Related Threads

Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here. All logos and trade names are the property of their respective owners.