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Carbon dioxide and lime in the water

ucla college essays, save time, get A-grades. It is no secret that a great number of college and university students are looking for help with their multiple essays on a number of subjects. And no wonder why, since it is not so easy to deal with tons of theoretical materials as well as dozens of teachers requirements. Carbon dioxide content in stagnant bodies of water is determined in the same way as oxygen content is determined, mainly through photosynthesis and respiration, however with a changed algebraic sign: Photosynthesis consumes CO2, which is released through respiration. Additional input and output of carbon dioxide occurs via the gas exchange with the air in proportion to increasing water movement.

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Carbon dioxide+WaterCarbonic acid

Check out our website for Latin Grammar Homework Help. Order cheap custom papers and receive A+ grades. Only qualified writers available 24/7. Carbon dioxide dissolves solid calcium carbonate and forms dissolved calcium hydrogen carbonate.

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Calcium carbonate
(Insoluble lime)
+ Carbonic acidCalcium hydrogen carbonate
(Soluble calcium carbonate)

Enjoy the Best Masters Dissertation Abstract How To Write Services by Professional Writers. Buy Coursework at Affordable Prices by The Coursework UK and Get Top Grades for Water that contains carbonic acid is also capable of dissolving lime, (scientists refer to it as calcium carbonate), through a chemical/physical process. The two arrows indicate that the reaction can progress in both directions. If carbon dioxide is withdrawn from the water, insoluble lime and carbon dioxide form until the balance is restored.

Insoluble lime is recognised as a white precipitation that is familiar as limescale. Since water when heated loses the ability to store lime in dissolved form, lime precipitates as limescale.

The lime content of the water influences the pH value, i.e. lime content determines whether the water will have a neutral, acidic, or alkaline reaction. The greater the concentration of dissolved lime, the more carbon dioxide in the form of carbonate of lime - referred to as calcium carbonate by specialists, is bound and the less free carbonic acid there is in the water. Consequently the pH value tends to move in the slightly alkaline range around pH 8. On the other hand the free carbonic acid, as its name indicates, causes a lowering of the pH values in the direction of the acid range.

In the field of fishkeeping frequently CO² discharge due to aeration is mentioned. This phenomenon occurs in the garden pond only to a very slight degree due to the greater water surface. However as opposed to the situation with tropical ornamental fish you should strive for a pH value from 7 to 8.5. Thus a slight increase is desirable. At pH values around 8 undersaturation occurs, which causes the water to automatically be enriched with the CO² contained in the air. Thus the aeration is harmless.