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| SULFURIC ACID! Having sulphuric acid in the river is going to mean a lot of dead fish on your hands, Timmy! | |
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| I know, I need to find a way to neutralize the acid before it can leave any extreme problems! | |
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| Well, you can neutralize acid by putting in another chemical with a pH level opposite it, so all you need to do is find a chemical to add to the river to solve the problem. | |
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| Thats so true! you’re so smart. | |
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| Hmmm…. So what could I add to the river to make it suitable for the fish to live? | |
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| Well, calcium oxide can neutralize the acid leaking from the train! | |
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