Concept explainers
8-38 What is the pH and pOH of each solution given the following values of [OH-)? Which solutions are acidic, which are basic, and which are neutral?
(a) 10-3 M
(b) 10-1 M
(c) 10-5 M
(d) 10-7 M
(a)
Interpretation:
pH and pOH of 10-3 m solution and whether it is acidic, basic or neutral solution to be identified.
Concept Introduction:
pH of a solution is the negative of logarithm of hydronium ion concentration which can be shown as:
pOH of a solution is the negative of logarithm of hydroxide ion concentration which can be shown as:
Where, [H3 O+ ] is the hydronium ion concentration.
[OH- ]is the hydroxide ion concentration.
The solution having pH more than 7 is considered as basic solution while the solution having pH less than 7 is considered as acidic solution.
Answer to Problem 8.38P
pOH of solution is 3, pH of solution is 11 and it is basic solution.
Explanation of Solution
Concentration of hydroxide ion.
Thus, pOH of solution is 3, pH of solution is 11 and it is basic solution.
(b)
Interpretation:
pH and pOH of 10-1 m solution and whether it is acidic, basic or neutral solution to be identified.
Concept Introduction:
pH of a solution is the negative of logarithm of hydronium ion concentration which can be shown as:
pOH of a solution is the negative of logarithm of hydroxide ion concentration which can be shown as:
Where, [H3 O+ ] is the hydronium ion concentration.
[OH- ]is the hydroxide ion concentration.
The solution having pH more than 7 is considered as basic solution while the solution having pH less than 7 is considered as acidic solution.
Answer to Problem 8.38P
pOH of solution is 1, pH of solution is 13 and it is basic solution.
Explanation of Solution
Concentration of hydroxide ion.
Thus, pOH of solution is 1, pH of solution is 13 and it is basic solution.
(c)
Interpretation:
pH and pOH of 10-5 m solution and whether it is acidic, basic or neutral solution to be identified.
Concept Introduction:
pH of a solution is the negative of logarithm of hydronium ion concentration which can be shown as:
pOH of a solution is the negative of logarithm of hydroxide ion concentration which can be shown as:
Where, [H3 O+ ] is the hydronium ion concentration.
[OH- ]is the hydroxide ion concentration.
The solution having pH more than 7 is considered as basic solution while the solution having pH less than 7 is considered as acidic solution.
Answer to Problem 8.38P
pOH of solution is 5, pH of solution is 9 and it is basic solution.
Explanation of Solution
Concentration of hydroxide ion.
Thus, pOH of solution is 5, pH of solution is 9 and it is basic solution.
(d)
Interpretation:
pH and pOH of 10-7 m solution and whether it is acidic, basic or neutral solution to be identified.
Concept Introduction:
pH of a solution is the negative of logarithm of hydronium ion concentration which can be shown as:
pOH of a solution is the negative of logarithm of hydroxide ion concentration which can be shown as:
Where, [H3 O+ ] is the hydronium ion concentration.
[OH- ]is the hydroxide ion concentration.
The solution having pH more than 7 is considered as basic solution while the solution having pH less than 7 is considered as acidic solution.
Answer to Problem 8.38P
pOH of solution is 7, pH of solution is 7 and it is neutral solution.
Explanation of Solution
Concentration of hydroxide ion.
Thus, pOH of solution is 7, pH of solution is 7 and it is neutral solution.
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Chapter 8 Solutions
Introduction to General, Organic and Biochemistry
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- 8-35 Given the following values of [H3O+), calculate the corresponding value of [OH-] for each solution. (a) 10-11 M (b) 10-4 M (c) 10-7 M (d) 10 Marrow_forward8-36 Given the following values of [OH-], calculate the corresponding value of [H3O+] for each solution. (a) 10-10 M (b) 10-2 M (c) 10-7 M (d) 10 Marrow_forward8-82 Assume that you have a dilute solution of HCI (0.10 M) and a concentrated solution of acetic acid (5.0 M). Which solution is more acidic? Explain.arrow_forward
- 8-107 Following are pH ranges for several human biological materials. From the pH at the midpoint of each range, calculate the corresponding [H3O+]. Which materials are acidic, which are basic, and which are neutral? (a) Milk, pH 6.6-7.6 (b) Gastric contents, pH 1.0-3.0 (c) Spinal fluid, pH 7.3-7.5 (d) Saliva, pH 6.5-7.5 (e) Urine, pH 4.8-8.4 (f) Blood plasma, pH 7.35-7.45 (g) Feces, pH 4.6-8.4 (h) Bile, pH 6.8-7.0arrow_forward8-50 The usual concentration of HCO3- ions in blood plasma is approximately 24 millimoles per liter (mmol/L). How would you make up 1.00 L of a solution containing this concentration of HCO3- ions?arrow_forward8-96 Suppose you want to make a CH3COOH/CH3COO- buffer solution with a pH of 5.60. The acetic acid concentration is to be 0.10 M. What should the acetate ion concentration be?arrow_forward
- 8-33 Write an equation for the reaction of HCI with each compound. Which are acid—base reactions? Which are redox reactions? (a) Na2CO3 (b) Mg (c) NaOH (d) Fe2O3 (e) NH3 (f) CH3NH2 (g) NaHCO3 (h) AIarrow_forward8-49 A solution of NaOH base was titrated with 0.150 M HCI, and 22.0 mL of acid was needed to reach the end point of the titration. How many moles of the unknown base were in the solution?arrow_forward8-62 What is the pH of a buffer solution made by dissolving 0.10 mol of formic acid, HCOOH, and 0.10 mol of sodium formate, HCOONa, in 1 L of water?arrow_forward
- Introduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage Learning