Hard to understand what you mean. I pure water, sodium bicarbonate forms an ordinary solution. I reacts with weak acid, decomposing to release CO2, but you don't mention that. A small quantity, dry, in a bottle should remain unchanged indefinitely. Your multiple solutions, to a nonexistent problem, don't even n make sense on their own, so I'm simply confused. You're going to have to describe your application more completely if we're to help.