Just curious to see if anyone in the group has been able to find the Salt NaCl for class?
I can buy salt in the grocery store that doesn't have iodine. Can I use Kosher or canning salt?
I imagine a non food grade might be less expensive, where would you find it?
Thanks.
Mary
P.S. What's several pounds? 7, 10, 20?
UPDATED: http://www.prochemicalanddye.com/store/product.php?productid=16191&cat=0&page=1