When you know there is going to be too much time between mixing baking soda and citric/lactic/whatever acid is being used, use baking powder. It has the alkalin

When you know there is going to be too much time between mixing baking soda and citric/lactic/whatever acid is being used, use baking powder. It has the alkaline soda and acid pre-mixed together, but does not fully activate until heat is applied.