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Sagot :
Two equivalents of NaOH are needed to fully neutralize the solution.
What is a neutralization reaction?
A neutralization reaction involves the reaction of an acid and a base to form salt and water. The reaction is exothermic in nature.
For example,
[tex]HCl (aq) + NaOH(aq)\rightarrow NaCl(aq) + H_2O (l)[/tex]
During the titration of [tex]H_2PO_4^-[/tex] it gives [tex]2H^+[/tex].
[tex]H_2PO_4^- \rightarrow 2H^+ +PO_4^3^-[/tex]
To neutralize these [tex]2H^+[/tex], 2 [tex]OH^-[/tex] is needed which come from 2 equivalents of NaOH
[tex]2NaOH \rightarrow2 Na^+ +2OH^-[/tex]
Therefore, 2 equivalents of NaOH are needed
Learn more about neutralization reaction:
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