Concept explainers
8-18 Which of these acids are monoprotic, which are diprotic, and which are triprotic? Which are amphiprotic?
(a) H2PO4-
(b) HBO32-
(c) HCIO4
(d) C2H5OH
(e) HSO3-
(f) HS-
(g) H2CO3
(a)
Interpretation:
The given chemical substance is monoprotic, diprotic or triprotic to be identified.
Concept Introduction:
A chemical substance which releases single proton or hydronium ion per molecule on dissociation in the aqueous solution is termed as monoprotic acid.
A chemical substance which releases two proton or hydronium ion per molecule on dissociation in the aqueous solution is termed as diprotic acid.
A chemical substance which releases three proton or hydronium ion per molecule on dissociation in the aqueous solution is termed as triprotic acid.
A chemical substance which can release or accepts a proton or hydronium ion in aqueous solution to behave as acid or base is termed as amphiprotic.
Answer to Problem 8.18P
H2 PO4 - is amphiprotic.
Explanation of Solution
H2 PO4 - is amphiprotic as it can release or accepts a proton as follows:
H2 PO4 - releases proton in aqueous solution and releases hydronium ion as follows:
H2 PO4 -gains proton in aqueous solution and releases hydroxide ion as follows:
(b)
Interpretation:
The given chemical substance is monoprotic, diprotic or triprotic to be identified.
Concept Introduction:
A chemical substance which releases single proton or hydronium ion per molecule on dissociation in the aqueous solution is termed as monoprotic acid.
A chemical substance which releases two proton or hydronium ion per molecule on dissociation in the aqueous solution is termed as diprotic acid.
A chemical substance which releases three proton or hydronium ion per molecule on dissociation in the aqueous solution is termed as triprotic acid.
A chemical substance which can release or accepts a proton or hydronium ion in aqueous solution to behave as acid or base is termed as amphiprotic.
Answer to Problem 8.18P
HBO3 -2 is amphiprotic.
Explanation of Solution
HBO3 -2 is amphiprotic as it can release or accepts a proton as follows:
HBO3 -2 releases proton in aqueous solution and releases hydronium ion as follows:
HBO3 -2 gains proton in aqueous solution and releases hydroxide ion as follows:
(c)
Interpretation:
The given chemical substance is monoprotic, diprotic or triprotic to be identified.
Concept Introduction:
A chemical substance which releases single proton or hydronium ion per molecule on dissociation in the aqueous solution is termed as monoprotic acid.
A chemical substance which releases two proton or hydronium ion per molecule on dissociation in the aqueous solution is termed as diprotic acid.
A chemical substance which releases three proton or hydronium ion per molecule on dissociation in the aqueous solution is termed as triprotic acid.
A chemical substance which can release or accepts a proton or hydronium ion in aqueous solution to behave as acid or base is termed as amphiprotic.
Answer to Problem 8.18P
HClO4 is monoprotic acid.
Explanation of Solution
HClO4 is monoprotic acid as it can release only one proton in aqueous solution and releases hydronium ion as follows:
(d)
Interpretation:
The given chemical substance is monoprotic, diprotic or triprotic to be identified.
Concept Introduction:
A chemical substance which releases single proton or hydronium ion per molecule on dissociation in the aqueous solution is termed as monoprotic acid.
A chemical substance which releases two proton or hydronium ion per molecule on dissociation in the aqueous solution is termed as diprotic acid.
A chemical substance which releases three proton or hydronium ion per molecule on dissociation in the aqueous solution is termed as triprotic acid.
A chemical substance which can release or accepts a proton or hydronium ion in aqueous solution to behave as acid or base is termed as amphiprotic.
Answer to Problem 8.18P
C2 H5 OH is monoprotic acid.
Explanation of Solution
C2 H5 OH is monoprotic acid as it can release only one proton in aqueous solution and releases hydronium ion as follows:
(e)
Interpretation:
The given chemical substance is monoprotic, diprotic or triprotic to be identified.
Concept Introduction:
A chemical substance which releases single proton or hydronium ion per molecule on dissociation in the aqueous solution is termed as monoprotic acid.
A chemical substance which releases two proton or hydronium ion per molecule on dissociation in the aqueous solution is termed as diprotic acid.
A chemical substance which releases three proton or hydronium ion per molecule on dissociation in the aqueous solution is termed as triprotic acid.
A chemical substance which can release or accepts a proton or hydronium ion in aqueous solution to behave as acid or base is termed as amphiprotic.
Answer to Problem 8.18P
HSO3 - is amphiprotic.
Explanation of Solution
HSO3 - is amphiprotic as it can release or accepts a proton as follows:
HSO3 -2 releases proton in aqueous solution and releases hydronium ion as follows:
HSO3 -2 gains proton in aqueous solution and releases hydroxide ion as follows:
(f)
Interpretation:
The given chemical substance is monoprotic, diprotic or triprotic to be identified.
Concept Introduction:
A chemical substance which releases single proton or hydronium ion per molecule on dissociation in the aqueous solution is termed as monoprotic acid.
A chemical substance which releases two proton or hydronium ion per molecule on dissociation in the aqueous solution is termed as diprotic acid.
A chemical substance which releases three proton or hydronium ion per molecule on dissociation in the aqueous solution is termed as triprotic acid.
A chemical substance which can release or accepts a proton or hydronium ion in aqueous solution to behave as acid or base is termed as amphiprotic.
Answer to Problem 8.18P
HS- is amphiprotic.
Explanation of Solution
HS- is amphiprotic as it can release or accepts a proton as follows:
HS- releases proton in aqueous solution and releases hydronium ion as follows:
HS-gains proton in aqueous solution and releases hydroxide ion as follows:
(g)
Interpretation:
The given chemical substance is monoprotic, diprotic or triprotic to be identified.
Concept Introduction:
A chemical substance which releases single proton or hydronium ion per molecule on dissociation in the aqueous solution is termed as monoprotic acid.
A chemical substance which releases two proton or hydronium ion per molecule on dissociation in the aqueous solution is termed as diprotic acid.
A chemical substance which releases three proton or hydronium ion per molecule on dissociation in the aqueous solution is termed as triprotic acid.
A chemical substance which can release or accepts a proton or hydronium ion in aqueous solution to behave as acid or base is termed as amphiprotic.
Answer to Problem 8.18P
H2 CO3 is diprotic acid.
Explanation of Solution
H2 CO3 is diprotic acid as it can release twoproton in aqueous solution and releases hydronium ion as follows:
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Chapter 8 Solutions
OWLv2 for Bettelheim/Brown/Campbell/Farrell/Torres' Introduction to General, Organic and Biochemistry, 11th Edition, [Instant Access], 1 term (6 months)
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