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Study Quiz 3
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1
Which of the following statements at is true of neutral water at room temperature?
A)The concentration of H3O+ is 18 g/L.
B)The concentration of H3O+ is equal to 1.0 x 10–7 mol/L.
C)The concentration of H3O+ is 55 mol/L.
D)The concentration of H3O+ is greater than the concentration of OH–.
2
What is [OH–] when [H3O+] is 1.4 x 10–5?
A)7.1 x 10–10mol/L
B)7.1 x 1018mol/L
C)1.4 x 109 mol/L
D)1.4 x 10–19mol/L
3
What is true in basic solution?
A)The concentration of H3O+ is greater than 1.0 x 10–7 mol/L.
B)The concentration of H3O+ is equal to 1.0 x 10–7 mol/L.
C)The concentration of H3O+ is less than 1.0 x 10–7 mol/L.
D)The concentration of H3O+ is greater than the concentration of OH–.
4
What is the pH of a 0.10 mol/L solution of KOH?
A)0.10
B)1.00
C)13.00
D)14.00
5
Solution A has a pH of 8.2 and solution B has a pH of 10.2. Which statement is true?
A)Solution A is more basic and its [H3O+] is 100 times greater than solution B.
B)Solution B is more basic and its [H3O+] is 100 times less than solution A.
C)Solution A is more basic and its [H3O+] is 100 times less than solution B.
D)Solution B is more basic and its [H3O+] is 100 times greater than solution A.
6
The pOH of a solution is 9.4, what is the pH?
A)9.4
B)4.0 x 10-10
C)2.5 x 10-5
D)4.6
7
Which data describes the most acidic solution?
A)[H3O+]= 10–3 mol/L
B)[OH–] = 10–10 mol/L
C)pH = 6
D)pOH = 12
8
What would be the best way to describe a solution in which the pOH = 6.0?
A)Slightly acidic
B)Slightly basic
C)Very acidic
D)Very basic
9
Which equation shows the concentration of hydronium ions if the pH is 2.5?
A)[H3O+] = 10–2.5
B)[H3O+] = 2.5
C)[H3O+] = 14.0 –2.5
D)[OH–] = 2.5
10
A solution of a strong acid has a pH of 2.60. It is diluted by a factor of 10. What is its new pH?
A)1.60
B)2.60
C)3.60
D)12.60





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