I'd like to find a simple and repeatable ways to make Co2 without any dangerous or messy byproducts and without the mess and ooze of baking soda and vinegar. Someone told me that baking soda mixed with lemon salt and then mixed with water would do it (?).
The reason i'm doing this is to euthanize mice humanely to be fed to a snake. The snake will eat them dead or alive, so there is no sense of sending the little guys off painfully and in terror. So I've seen folks do it with the baking soda route, but it is messy and there is an initial rush of CO2 created... this is very irritating to the respiratory tract of the critters. They've got to pass away so the snake can live, but i just want them to drift off to sleep completely unaware.
If there are safe dry ingredients that will react without any liquids or heating, that would be awesome. If a liquid is required then i'm hoping good old h2o will fit the bill.
The second part of this would be (assuming this is doable) to ask how to be able to calculate or at least approximate the amount of co2 being produced.
Thanks in advance! I really appreciate any guidance