19. What is the pH of 1.91 M HCl? A) -0.28 B) 0.28 C) 1.91 D) 13.72 E) 7.00 20.

Question

19.

What is the pH of 1.91 M HCl?

A) -0.28
B) 0.28
C) 1.91
D) 13.72
E) 7.00

20.

Concentrated HCl is about 12 M. What is the pH of this solution?

A) 1.08
B) -1.08
C) 12.92
D) 0.00
E) 0.12

21.

Dilution of a weak acid will

22.

The degree of ionization is larger for

23.

A stronger base

24.

An anion is likely to be

A) an acid.
B) a base.
C) Neither

19. What is the pH of 1.91 M HCl? A) -0.28 B) 0.28 C) 1.91 D) 13.72 E) 7.00 20. Concentrated HCl is about 12 M. What is the pH of this solution? A) 1.08 B) -1.08 C) 12.92 D) 0.00 E) 0.12 21. Dilution of a weak acid will A) increase the percentage of acid ionized. B) decrease the percentage of acid ionized. C) have no effect on the percentage of acid ionized. D) increase the percentage ionized if . 24. An anion is likely to be A) an acid. B) a base. C) Neither . E) has no . D) has a low pH and a high . C) has a high pH and a high . B) has a low pH and a low 23. A stronger base A) has a high pH and a low . C) Ionization is independent of . B) smaller values of . 22. The degree of ionization is larger for A) larger values of >

Explanation / Answer

19) A. pH=-log([H+]) HCl is a strong acid so it dissociates completely in soulution (nearly). So the [H+] is 1.91, pH can be negative and in fact any strong acid with a Molarity greater than 1 will be negative.

20) A.

21) A

22) A

23) C

24) B

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