Chemistry, 29.06.2019 22:20 soccer816

Asolution containing hcl and the weak acid hclo2 has a ph of 2.4. enough koh (aq) is added to the solution to increase the ph to 10.5. the amount of which of the following species increases as the koh (aq) is added? a)cl- (aq) b)h+ (aq) c)clo2- (aq) d)hclo2 (aq)

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Answer from: paulesparsa6

The amount of ClO2- increases as aqueous KOH is added.

AcidsAcids are substances which donate hydrogen ions or protons in aqueous solutions. Acids can either be strong or weak.

Strong acids ionize completely in solution to produce hydrogen ions.

Weak acids only ionize partially in solution to produce hydrogen ions.

HCl is a strong acid and ionizes completely to produce hydrogen and chloride ions.HClO2 is a weak acid and only ionizes partially.

When aqueous KOH is added to a mixture of HCl and HClO2, the follow occurs:

Hydrogen ions from HCl are removed, hence H+ reduces.Cl- amount remains the same but is diluted as the volume of solution increases.ClO2- increases as the hydrogen ions are removed from the partially ionized HClO2.HClO2 decreases due to equilibrium shift towards formation of more H+ and ClO2-

Therefore, the amount of ClO2- increases as aqueous KOH is added.

Learn more about weak and strong acid at: link

Answer from: lilpeepxliltracy

$\boxed{\rm \text{[ClO$_{2}^{-}$] increases}}$

Explanation:

At the beginning, you have two reactions happening:

$\rm HCl + H$_{2}$O$ $\, \longrightarrow \,$ H$_{3}$O$^{+}$ + Cl$^{-}$\\\rm HClO$_{2}$ + H$_{2}$O$ $\, \rightleftharpoons \,$ H$_{3}$O$^{+}$ + ClO$_{2}^{-}$$

As you add KOH(aq), it does two things:

It increases the volume of the solution. It reacts with the hydronium ions to form water.

A) The HCl is completely ionized. The Cl⁻ does not react, but it is diluted when the volume of the solution increases. [Cl⁻] decreases.

B) The KOH reacts with the H⁺ and removes it from the solution. [H⁺] decreases.

C) When all the H⁺ from the HCl has been neutralized, the KOH starts neutralizing the H⁺ from the HClO₂. According to Le Châtelier's Principle, more HClO₂ will dissociate to replace the decreased H⁺. [HClO₂] decreases.

D) As HClO₂ reacts, it forms ClO₂⁻. $\boxed{\rm \textbf{[ClO$_{2}^{-}$] increases}}$

Answer from: Quest

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Answer from: Quest

the correct answer is:

a. formation of precipitation

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Asolution containing hcl and the weak acid hclo2 has a ph of 2.4. enough koh (aq) is added to the so...

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