2007-12-07 04:30:26 · 5 answers · asked by presidentrichardnixon 3 in Science & Mathematics ➔ Earth Sciences & Geology
How can water have more or less oxygen present: water is defined as two parts hydrogen, one part oxygen.
2007-12-07 04:36:56 · update #1
The term is not referring to the water molecule but rather the oxygen that is dissolved in the water. Think of it this way, why do you pump air into a fish tank? Its not because water is missing the O in H2O. Its because there needs to be oxygen in the water.
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2007-12-07 04:39:16 · answer #1 · answered by The man 7 · 3⤊ 0⤋
Pure water is H2O. But water can have other things mixed into it or dissolved into it. Like salt, oil, oxygen, CO2, mud, etc.
Actually, even in pure water, some of the H2O molecules split into H+ and HO- ions; about 1 molecule in 10^14 will split.
2007-12-07 14:46:07 · answer #2 · answered by morningfoxnorth 6 · 0⤊ 0⤋
Low oxygen can directly kill or stress organisms such that they will not be able to successfully reproduce or grow.
Water with less than 1 part per million (ppm) of oxygen is considered anoxic (no oxygen present); less than 5 ppm of oxygen is generally considered so stressful that most coldwater fish will avoid these areas. Anoxic (low oxygen) conditions can also promote Total Phosphorous (TP) release from sediments.
2007-12-07 12:35:13 · answer #3 · answered by ? 6 · 2⤊ 0⤋
Water can also have dissolved gasses in it. CO2 is dissolved in water to make soda.
Fish and other aquatic organisms breathe oxygen. But not what is attached to the hydrogens. Oxygen (O2) can be dissolved in water. It has to be for things to live.
2007-12-07 12:48:46 · answer #4 · answered by Lady Geologist 7 · 2⤊ 0⤋
they are talking about oxygen dissolved in the water rather than the H2O ratio
2007-12-07 13:41:39 · answer #5 · answered by rosie recipe 7 · 0⤊ 0⤋