FOUND.OF COLLEGE CHEMISTRY
FOUND.OF COLLEGE CHEMISTRY
15th Edition
ISBN: 9781119234555
Author: Hein
Publisher: WILEY
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Chapter 15, Problem 51AE

(a)

Interpretation Introduction

Interpretation:

Whether a substance that turns red litmus to blue is acidic, basic or neutral has to be determined.

Concept Introduction:

Acids are substances usually sour in taste, corrosive and turn blue litmus turns red. The bases are substances that are soapy to touch bitter and have ability to turn red litmus to blue. The neutral substances show no color change on test with litmus solution.

(b)

Interpretation Introduction

Interpretation:

Whether a substance with 6 as pH is acidic, basic or neutral has to be identified.

Concept Introduction:

The acidity strength is quantified by the magnitude of a parameter called pH. The strong acids tend to lower values of pH. This is since pH represents negative logarithm of concentration of H+ ion. So higher the concentration of H+ ion lower will be pH.

The expression to evaluate pOH is as follows:

  pOH=log[OH]

Here,

[OH] denotes concentration of OH ions.

The expression to evaluate pH from pOH is as follows:

  pH=14pOH

(c)

Interpretation Introduction

Interpretation:

Whether a substance with 1×107 M as concentration of H+ ion is acidic, basic or neutral has to be identified.

Concept Introduction:

The acidity strength is quantified by the magnitude of a parameter called pH. The strong acids tend to lower values of pH. This is since pH represents negative logarithm of concentration of H+ ion. So higher the concentration of H+ ion lower will be pH.

The expression to evaluate pH is as follows:

  pH=log[H+]

Here,

[H+] denotes concentration of H+ ions.

(d)

Interpretation Introduction

Interpretation:

Whether a substance that has 1×108 M as concentration of OH ion is acidic, basic or neutral has to be identified.

Concept Introduction:

Refer to part (b).

(e)

Interpretation Introduction

Interpretation:

Whether a substance that turns blue litmus to red is acidic, basic or neutral has to be determined.

Concept Introduction:

Refer to part (a).

(f)

Interpretation Introduction

Interpretation:

Whether a substance with 12 as pH is acidic, basic or neutral has to be identified.

Concept Introduction:

Refer to part (b).

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4. Read paragraph 4.15 from your textbook, use your calculated lattice energy values for CuO, CuCO3 and Cu(OH)2 an explain thermal decomposition reaction of malachite: Cu2CO3(OH)2 →2CuO + H2O + CO2 (3 points)

Chapter 15 Solutions

FOUND.OF COLLEGE CHEMISTRY

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