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Why did It take one drop of HCI to decrease the pH of the buffered solution from 7 to 6?
Wiki User
∙ 13y ago
First it's HCl (with a lowercase L) not HCI.
But as to the small amount of acid needed to provide the increase: HCl is a strong acid and so it completely dissociates to produce H+ ions, so the H+ concentration equals the HCl(aq) concentration.
A decrease in pH from 7 to 6 represents an increase in H+ ions from 10-7M to 10-6M. This would therefore only require the addition of about 3.65X10-5 grams of HCl for one liter of water, a very small quantity.
Wiki User
∙ 13y ago
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