Question

Acid precipitation can harm living organisms in rivers and streams, but some rivers are more vulnerable than others. Streams in the Adirondack Mountains, for example, were quickly acidified by acid precipitation in the 1970s and 80s, kiling local trout populations. But rivers that ran through a bed of limestone (calcium carbonate), like the Clark Fork River in Montana, were less affected. Part 8 of 10 What can explain the relative lack of effect of acid precipitation on the Clark Fork River? 3 00:38 Multiple Choice The calcium ions from the limestone react with H ions, pulling them out of solution. Trout cannot live in rivers that run through limestone, Referencer The carbonate lons from the limestone react with water to form a buffer OO Since mestones porous, the acid is absorbed into the rock,

Answer 1

- Hem Buffee. 223 c) the carbonate ions from the limestone react with Hao Acid promotes the dissolution of calcium carbonate by reacting with the carbonate anion. This produces a bicarbonate solution. Thus, this reacts with the surface carbond dioxide this, their is a constant concentration of carbonic acid that acts a buffen f mantams a constant ph because the minerals react with the excess acid. b) the extra nt ions will be bound by the conjugate base 460" , pushing the equilibrium to the left: (25) a) eventually the conjugeite base wo depleted į the. pn. would drop. A buffee must contain significant amounts of both a weak acid f its conjugate base or a weak base f its conjugate acid. Thus, till the time there is a sufficient quantity of both the phe would remain constant post which it would doop or rise depending upon whether an acid or base is being added.

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