Chapter 2: Q13CP (page 39)

Describe how to calculate pH from the concentration of H⁺ or OH^-.

Short Answer

Expert verified

The pH can be calculated using pH formula.

Step by step solution

Introduction

The negative log 10 of the hydrogen ion concentration in an aqueous solution is defined as pH.

Concentration of H+ and OH-

The pH scale classifies values below 7 as acidic and those over 7 as basic, whereas, pH 7 is consideredneutral or physiological pH. The amount of $H^{+}$ ions in solution increases under an acidic state, lowering the pH. Similarly, an increase in the concentration of the ${OH}^{-}$ (hydroxyl) ion elevates the pH value over .

Example calculation of pH

$\begin{array}{l} H_{2} {OH}^{+} + {OH}^{-} \\ pH = - \log [H^{+}] \\ [H^{+}] = 10^{- pH} \\ pH + pOH = 14 \\ pH = - \log_{10} (1 \times 10^{- 7}) \\ pH = 7 \end{array}$

Therefore, the value of pHwith respect to the concentration of $H^{+}$ and is 7.

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Describe how to calculate pH from the concentration of H⁺ or OH^-.

Short Answer

Step by step solution

Introduction

Concentration of H+ and OH-

Example calculation of pH

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Describe how to calculate pH from the concentration of H+ or OH-.

Short Answer

Step by step solution

Introduction

Concentration of H+ and OH-

Example calculation of pH

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Biology Textbooks

Biological Organisms

Cell Cycle

Heredity

Organ Systems

Chemistry of Life

Bioenergetics

Study anywhere. Anytime. Across all devices.

Describe how to calculate pH from the concentration of H⁺ or OH^-.