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Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

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BuyFindarrow_forward

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
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. Calculate the pH and pOH values for each of the following solutions.
a.0.00562 M HClO4
b. 3.98 × 10 4 M   K O H    c. 0.078 M HNO3
d. 4.71 × 10 6 M  Ca(OH) 2

Interpretation Introduction

(a)

Interpretation:

The pH and pOH values for 0.00562MHClO4 solution are to be calculated.

Concept Introduction:

The term pH referred to the power of hydrogen. The pH of a solution is mathematically equal to the negative logarithm of concentration of H+ ion in solution. The pH of a solution is represented as,

pH=log[H+]

Where,

  • [H+] represents the concentration of H+ ions in the solution.

The pOH of a solution is used to measure the alkalinity of the solution. The pOH of a solution is mathematically equal to the negative logarithm of concentration of OH ion in solution. The pOH of a solution is represented as,

pOH=log[OH]

Where,

  • [OH] represents the concentration of OH ions in the solution.
Explanation

The concentration of the HClO4 solution is 0.00562M.

The dissociation of HClO4 in aqueous medium is represented as,

HClO4(aq)H+(aq)+ClO4(aq)

One mole of HClO4 produces one mole of H+ ions in the solution, Hence, the concentration of the HClO4 solution and the concentration of H+ ions in the solution is equal.

Therefore, the concentration of H+ ions in the solution is 0.00562M

Interpretation Introduction

(b)

Interpretation:

The pH and pOH values for 3.98×104MKOH solution are to be calculated.

Concept Introduction:

The term pH referred to the power of hydrogen. The pH of a solution is mathematically equal to the negative logarithm of concentration of H+ ion in solution. The pH of a solution is represented as,

pH=log[H+]

Where,

  • [H+] represents the concentration of H+ ions in the solution.

The pOH of a solution is used to measure the alkalinity of the solution. The pOH of a solution is mathematically equal to the negative logarithm of concentration of OH ion in solution. The pOH of a solution is represented as,

pOH=log[OH]

Where,

  • [OH] represents the concentration of OH ions in the solution.
Interpretation Introduction

(c)

Interpretation:

The pH and pOH values for 0.078MHNO3 solution are to be calculated.

Concept Introduction:

The term pH referred to the power of hydrogen. The pH of a solution is mathematically equal to the negative logarithm of concentration of H+ ion in solution. The pH of a solution is represented as,

pH=log[H+]

Where,

  • [H+] represents the concentration of H+ ions in the solution.

The pOH of a solution is used to measure the alkalinity of the solution. The pOH of a solution is mathematically equal to the negative logarithm of concentration of OH ion in solution. The pOH of a solution is represented as,

pOH=log[OH]

Where,

  • [OH] represents the concentration of OH ions in the solution.
Interpretation Introduction

(d)

Interpretation:

The pH and pOH values for 4.71×106MCa(OH)2 solution are to be calculated.

Concept Introduction:

The term pH referred to the power of hydrogen. The pH of a solution is mathematically equal to the negative logarithm of concentration of H+ ion in solution. The pH of a solution is represented as,

pH=log[H+]

Where,

  • [H+] represents the concentration of H+ ions in the solution.

The pOH of a solution is used to measure the alkalinity of the solution. The pOH of a solution is mathematically equal to the negative logarithm of concentration of OH ion in solution. The pOH of a solution is represented as,

pOH=log[OH]

Where,

  • [OH] represents the concentration of OH ions in the solution.

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