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When a weak acid ( HA ) is titrated with a strong base, such as NaOH what species are decreasing in concentration before the equivalence point is reached? Na + Na + and A − A − HA HA and H + H + ( H 3 O + ) ( H 3 O + ) Na + Na + and OH − OH − HA HA and A − A −

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Answer:

HA and A-

Explanation:

before the equivalence point, there is a HA/A- buffer solution by wich the pH is calculated.

Therefore, the species that decrease their concentration before the equivalence point are HA and A-

The species are decreasing in concentration before the equivalence point is reached [tex]HA \text { and } A^-[/tex].

Equivalence point:

The point in a titration where the amount of titrant added is enough to completely neutralize the analyte solution.

Before the equivalence point, there is a [tex]\frac{[HA]}{[A^-]}[/tex] buffer solution by which the pH is calculated.

[tex]HA--->H^++A^-\\\\NaOH--->Na^++OH^-[/tex]

Therefore, the species that decrease their concentration before the equivalence point are [tex]HA \text { and } A^-[/tex].

Find more information about Equivalence point here:

brainly.com/question/24584140

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