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Ionisation of acids and bases

Three reactions involving {H}_{2} {PO}_{4}^{-}are given below

Question

Medium

Solving time: 3 mins

Three reactions involving $H_{2} PO_{4}^{-}$ are given below I. $H_{3} PO_{4} + H_{2} O ⟶ H_{3} O^{+} + H_{2} PO_{4}^{-}$ II. $H_{2} PO_{4}^{-} + H_{2} O ⟶ HPO_{4}^{2 -} + H_{3} O^{+}$ III. $H_{2} PO_{4}^{-} + OH^{-} ⟶ H_{3} PO_{4} + O^{2 -}$ In which of the above does $H_{2} PO_{4}^{-}$ act as an acid?

II only

I and II

III only

I only

Views: 5,240 students

Updated on: Dec 24, 2022

Book:

Arihant Chemistry JEE Main Chapterwise Solutions (2019-2002) (Arihant)

Exam:

JEE Mains 2010

Found 6 tutors discussing this question

Levi Discussed

Three reactions involving

H_{2} PO_{4}^{-}

are given below I.

H_{3} PO_{4} + H_{2} O ⟶ H_{3} O^{+} + H_{2} PO_{4}^{-}

II.

H_{2} PO_{4}^{-} + H_{2} O ⟶ HPO_{4}^{2 -} + H_{3} O^{+}

III.

H_{2} PO_{4}^{-} + OH^{-} ⟶ H_{3} PO_{4} + O^{2 -}

In which of the above does

H_{2} PO_{4}^{-}

act as an acid?

9 mins ago

Discuss this question LIVE

9 mins ago

Text solutionVerified

Only in reaction (II),

H_{2} PO_{4}^{-}

, gives

H^{+}

H_{2} O

. Thus, behaves as an acid.

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Question Text	Three reactions involving $H_{2} PO_{4}^{-}$ are given below I. $H_{3} PO_{4} + H_{2} O ⟶ H_{3} O^{+} + H_{2} PO_{4}^{-}$ II. $H_{2} PO_{4}^{-} + H_{2} O ⟶ HPO_{4}^{2 -} + H_{3} O^{+}$ III. $H_{2} PO_{4}^{-} + OH^{-} ⟶ H_{3} PO_{4} + O^{2 -}$ In which of the above does $H_{2} PO_{4}^{-}$ act as an acid?
Updated On	Dec 24, 2022
Topic	Equilibrium
Subject	Chemistry
Class	Class 11
Answer Type	Text solution:1 Video solution: 4
Upvotes	415
Avg. Video Duration	8 min

Text solutionVerified

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Three reactions involving H2​PO4−​are given below I. H3​PO4​+H2​O⟶H3​O++H2​PO4−​ II. H2​PO4−​+H2​O⟶HPO42−​+H3​O+ III. H2​PO4−​+OH−⟶H3​PO4​+O2− In which of the above does H2​PO4−​act as an acid?

Text solutionVerified

Filo tutor solutions (4)

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