by 
Anonymous
ANSWERS: 6
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Because your glasses have not been cleaned or rinsed properly and there is some sort of residue left on them. While working as a bartender and Dining room manager over the years while our dishwashers were being serviced I was told many times by many people with many different jobs that bubbles on a glass was a sign that they were not coming out as clean as they should be.
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It is released O2 as a result of turbulence of the pouring process.
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because without them how would the water company poison the masses.
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Atmospheric gases such as nitrogen and oxygen can dissolve in water. The amount of gas dissolved depends on the temperature of the water and the atmospheric pressure at the air/water interface. Colder water and higher pressure allow more gas to dissolve; conversely, warmer water and lower pressure allow less gas to dissolve. When you draw a glass of cold water from your faucet and allow it to warm to room temperature, nitrogen and oxygen slowly come out of solution, with tiny bubbles forming and coalescing at sites of microscopic imperfections on the glass. If the atmospheric pressure happens to be falling as the water warms, the equilibrium between gas molecules leaving and joining the air/water interface becomes unbalanced and tips in favor of them leaving the water, which causes even more gas to come out of solution. Hence bubbles along the insides of your water glass.
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i only recently started having bubbles form after and istallation of our new water filter and softener. that is probably what causes it soft water.
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There are gases (like carbon dioxide, oxygen, etc) dissolved in water. When water is heated, these gases are less soluble in the water. When you boil water, the bubbling is dissolved gases being released. So I would say that leaving a glass of water out all night lets the water "warm" up and those bubbles are bubbles of oxygen, carbon dioxide, etc being released. No, you're not boiling the water by leaving it out...the gases are just less soluble at the warmer temperature.
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