What is the reason for bubbles in bottled water? – The main reason for bubbles in water bottle is dissolved gases. There are many reasons for dissolving gases in the water. The amount of gases dissolved in water depends on pressure, temperature, types of dissolved gas, chemical composition of the bottled water. Atmospheric gases such as oxygen, carbon di-oxide, nitrogen and other gases can dissolve in water.
Pressure is the important parameter for dissolving gases into the water. When the pressure is higher, then more gases are dissolved into the water. On the other hand, in lower pressure, there is less ability to dissolved gases into the water. When pressure is comes down from higher to lower then the water release some gases as bubbles. Therefore we see the bobbles in bottled water. Tap or pipes water is one of the example of high pressure water.
Temperature is another factor for more bubbles in bottled water. When the temperature is lower, then it is extended possible to dissolve more gases into the water. Conversely, in higher temperature, it is less possible to dissolved gases into the water. As a result when the cold water allow to warms at room temperature then some gases such as nitrogen, oxygen and carbon di-oxide come out of solution as tiny bubbles which we are found side of the bottled.
Different chlorine-based chemicals are added in two the water to kill bacteria. As a result chlorine gas may introduce in to the tap water. Normally, water is under high pressure inside the pipes compare to outside the pipes. Therefore many gases as like nitrogen, carbon di-oxide, oxygen, chlorine can dissolve into the water. When the bottled is filled with this tap water then it resides in your bottle and come out of water while the pressure is released.
When a bottle is filling with tap water sometimes it may looks cloudy. Reason, tap water remains under a high pressure, when the pressure is released then tiny air bubbles come out of solution. Moreover, at first the “air” inside the empty bottle may dissolve in water due to dynamic high pressure but eventually they also come out as tiny gas bubbles. Hence we see the cloudy water. After a few seconds the cloudiness will be cleared as the gases goes into the air above.
Soda water or soft drinks
We know that the gases dissolved in water greatly in lower temperature and high pressure. This technique is applied in soda water or soft drinks. Carbonated water is one of the main sources for manufacturing soft drinks and soda water. Carbonated water is produced by dissolving carbon di-oxide in water at high pressure and lower temperature. When a bottle is filling with this, then some pressure is released and temperature is slowly increases. Consequently, the gas comes out of water as thousands of tiny bubbles. They tend to appear on the sides of the bottle because the bottles surfaces are porous (or rough spots). Immediately this bobbles disappear and exists as free gas in free spaces inside the bottles and rest carbon di-oxide gas are exist in soda or soft drinks as dissolved gas. So, normally, we cannot see the bobbles when we buy soda water from market. When we de-cap the bottles then we again see the bobbles in water bottle because the pressure is released. Sparkling water is usually bottled or canned like same process as soft drinks. These are the reason for bubbles in bottled water.