HW #16 Chapter 11 Problem 11.30 with feedback ResourcesConstantsPeriodic Table «

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HW #16 Chapter 11

Problem 11.30 with feedback

ResourcesConstantsPeriodic Table

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Problem 11.30 with feedback

Part A

Consider the following acids and their dissociation constants:

HPO42(aq)HCHO2(aq)++H2O(l)H2O(l)H3O+(aq)H3O+(aq)++PO43(aq),CHO2(aq),Ka=2.2×1013Ka=1.8×104

Match the words in the left column to the appropriate blanks in the sentences on the right.

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PO43

H2PO4

HPO42

H3O+

HCHO2

CHO2

1. Given the acids HPO42 and HCHO2, the weaker acid is .

2. The conjugate base of HPO42 is .

3. Given the acids HPO42 and HCHO2, the one with the weaker conjugate base is and the one with the stronger conjugate base is .

4. Given the acids HPO42 and HCHO2, the one that produces more ions is .

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PO43

H2PO4

HPO42

H3O+

HCHO2

CHO2

1. Given the acids HPO42 and HCHO2, the weaker acid is .

2. The conjugate base of HPO42 is .

3. Given the acids HPO42 and HCHO2, the one with the weaker conjugate base is and the one with the stronger conjugate base is .

4. Given the acids HPO42 and HCHO2, the one that produces more ions is .

Explanation / Answer

HPO42(aq)+H2O(l) H3O+(aq)   + PO43(aq) Ka=2.2×1013

HCHO2(aq) + H2O(l)H3O+(aq)+ ,CHO2(aq), Ka=1.8×104

1. Given the acids HPO42 and HCHO2, the weaker acid is .

HPO42-

2. The conjugate base of HPO42 is .

PO43-

3.

the one with the weaker conjugate base is : HCHO2

and the one with the stronger conjugate base is : HPO2-

4. Given the acids HPO42 and HCHO2, the one that produces more ions is .

HCHO2 produce more ions

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