I read several times in books and on the internet that they do not, but this illustration on the Wikipedia confused me because of the zink and the sulfate ions are written above the arrow (image source):

Schematic of Zn-Cu galvanic cell

  • $\begingroup$ Sorry, you are right. I rewritited the question. I wanted to ask if they mix in the salt bridge. This picture is from the "Galvanic Cell" Wikipedia article,which is the most important part of my question, as these words above the Ion bridge("Zinc ions,Sulfate ions) confused my knowledge, hence I don't understand why it is not relevant. $\endgroup$ – user102753 Dec 28 '20 at 14:01