User talk:139.222.127.240
So it depends on the indicator? If I choose an indicator that can form a complex with calcium and change color, magnesium should not be necessary... Which indicator do you mean? Xenon Hexafluoride (talk) 20:10, 26 June 2019 (UTC)
 | This is the discussion page for an IP user, identified by the user's IP address. Many IP addresses change periodically, and are often shared by several users. If you are an IP user, you may create an account or log in to avoid future confusion with other IP users. Registering also hides your IP address. |