For each of the following strong base solutions, determine [OH],[H3O+], p H , an

Question

For each of the following strong base solutions, determine [OH],[H3O+], pH, and pOH.

Part A

0.20 M NaOH

Express your answer using two significant figures. Enter your answers numerically separated by commas.

______________

Part B

Express your answer to two decimal places. Enter your answers numerically separated by commas.

Part C

1.4×103 M Ca(OH)2

Express your answer using two significant figures. Enter your answers numerically separated by commas.

____________

Part D

Express your answer to two decimal places. Enter your answers numerically separated by commas.

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Part E

4.6×104 M Sr(OH)2

Express your answer using two significant figures. Enter your answers numerically separated by commas.

Part F

Express your answer to two decimal places. Enter your answers numerically separated by commas.

Part G

8.8×105 M KOH

Express your answer using two significant figures. Enter your answers numerically separated by commas.

Part H

Express your answer to two decimal places. Enter your answers numerically separated by commas.

______________

Explanation / Answer

1. NaOH---> Na+ +OH-

0.2 M NaOH   means [OH-] =0.2M

p(OH-)= -log(0.2)= 0.699

pH= 14-0.699= 13.301

[H+] =10(-13.301) =5*10-14 =[H3O+]

2. 1,4*10-3 Ca*OH)2

Ca(OH)2----> Ca+2 +2OH-

OH- =2*1.4*10-3 =2.8*10-3

pOH= -log(2.8*10-3)=2.55

pH= 14-2.55= 11.45

[H+] =10(-11.45) =3.55*10-12

c) 4.6*10-4 Sr(OH)2 , Sr(OH)2----> Sr+2 +2OH-

[OH-] =2*4.6*10-4 =9.2*10-4, pOH= -log(9.2*10-4)=3.04 pH= 14-3.04= 10.96 [H+]= 10(-10.96)=1.09*10-11

d) 8.8*10-5 KOH, KOH--->k+ +OH-

[OH-] =8.8*10-5 pOH- =-log(8.8*10-5)=4.055, pH= 14-4.055=9.945, [H+] =10(-9.945)=1.13*10-10

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