I have a few simple questions about the process of dissolving a gas in water, if anyone could give me any help it would be appreciated. 1. How do I know the gas has dissolved? i.e. if I "bubble" gas into the liquid how do I know it hasn't just "bubbled" out? Or would this only occur once the liquid has been saturated? How do I know when the water is saturated? 2. If I measured the amount of gas that I put in how would I calculate the gas concentration of the liquid? 3. What would the liquid become? i.e it would no longer be pure water, please could someone give me an example of what the liquid would become for an example gas. 4. Is there molecular bonding or do the water molecules stay seperate from the gas molecules? Apologies if these are stupid / basic questions as I'm not a chemist but trying to get an idea as to what is happening and what the result is when you introduce a gas to a liquid. Thanks in advance!