Exercise 15.57 For each strong acid solutions, determine [H3O+],[OH], and pH. Pa

Question

Exercise 15.57 For each strong acid solutions, determine [H3O+],[OH], and pH.

Part A

0.17 M HCl

Express your answer using two significant figures.

Part B

Express your answer to two decimal places.

pH=

Part C

2.2×102 M HNO3

Express your answer using two significant figures.

Part D

Express your answer to two decimal places.

pH=

Part E

a solution that is 6.2×102 M in HBr and 1.9×102 M in HNO3

Express your answer using two significant figures.

Part F

Express your answer to two decimal places.

pH=

Part G

a solution that is 0.705% HNO3 by mass (Assume a density of 1.01 g/mL for the solution.)

Express your answer using three significant figures.

Part H

Express your answer to three decimal places.

pH=

Explanation / Answer

Answers,-

Part A ..........[ H3O +], [OH- ] ............1.7 x 10-1 , 5.7 x 10-13 M

Part B ..............................pH = 0.77

Part C ......[H3O+] , [OH- ]............2.2 x 10-2 , 4.5 x 10-13 M

Part D..................................pH = 1.65

Part E.........[ H3O+] , [OH-] ............8.1 x 10-2 , 1.2 x 10-13 M

Part F.....................................pH = 1.09

Part G..........[ H3O+ ] [OH- ]....................1.13 x 10-3 , 8.85 x 10-12 M

Part H....................................pH = 0.946

Explanation:

All questions from Part A to Part F call for calculations based on ,

Strong acids ( viz. HCl , HNO3  , HBr ) ionize completely in their aqueous solutions.

[ H+ ] [OH- ] = 1.0 x 10-14

(iii) pH of an aqueous solution is calculated using expression ,

........................pH = - log [ H3 O+ ]

(

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