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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

01

Introduction

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

02

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 ofH+ ions in solution increases under an acidic state, lowering the pH. Similarly, an increase in the concentration of theOH- (hydroxyl) ion elevates the pH value over .

03

Example calculation of pH

H2OH++OH-pH=-logH+H+=10-pHpH+pOH=14pH=-log101脳10-7pH=7

Therefore, the value of pHwith respect to the concentration ofH+ and is 7.

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