Which One of the Following Is a Diprotic Acid

A weak acid represented here as HA is one in which the reaction. Phosphoric acid H3PO4 is a triprotic acid and shows the following ionization reactions in aqueous solution.

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This acid is much weaker with its value much smaller than one.

. Label the following points. Phenolphthalein which changes from colorless to pink when enough NaOH has been added to react with all the KHP present is used as an indicator for the. Each ionization characterized by specific equilibrium constant.

Strong acids have a small logarithmic constant pKa and a large acid dissociation constant Ka. The point where the pH corresponds to a solution of H A in water b. The graph shows the titration of a polyprotic weak acid with a strong base.

Polyprotic acids possess several ionizable hydrogens and undergo stepwise ionization. H3PO4 aq H2O l H3O1aq H2PO4-1aq. React with acids in which case a diprotic acid named phthalic acid H 2 C 8 H 4 O is produced The volume of your NaOH solution needed to react with the KHP will be determined by a titration.

As their name suggests polyprotic acids contain more than one acidic proton. Which one of the following is a triprotic acid A nitric acid B chloric acid C phosphoric acid D hydrofluoric acid E sulfuric acid. Which of the following is a diprotic acid A nitric acid B chloric acid C phosphoric acid D hydrofluoric acid E sulfuric acid.

The point where the pH corresponds to a solution of A2- in water d. So citric acid is slightly tangy as most of the molecules have not deprotonated while HCl is mostly reactive ions. The point where the pH corresponds to a solution of HA in water c.

Which one of the following is a weak acid. HA A H 1-1. Certain types of polyprotic acids have more specific names such as diprotic acid two potential protons to donate and triprotic acid three potential protons to donate.

The point where pH equals pKal e. Polyprotic acid are able to donate more than one proton per acid molecule in contrast to monoprotic acids that only donate one proton per molecule. Diprotic and polyprotic acids show unique profiles in titration experiments where a pH.

Diprotic and polyprotic acids may lose more than one proton but the strong acid pKa value and reaction refer only to the loss of the first proton. Two common examples are carbonic acid H 2 CO 3 which has two acidic protons and is therefore a diprotic acid and phosphoric acid H 3 PO 4 which has three acidic protons and is therefore a triprotic acid. This means that if we add 1 mole of the pure acid HA to water and make the total volume 1 L the equilibrium concentration of the conjugate base A will be smaller often much smaller than 1 ML while that of undissociated HA will be only slightly less than 1 ML.

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