7) Which of the following is a STRONG acid? HCIO4 D) NH4 E) H20 8) Which of the

Question

7) Which of the following is a STRONG acid? HCIO4 D) NH4 E) H20 8) Which of the following is a WEAK acid? A) HC104 B) H2S04 E) HNO3 9) Which of the following solutions would have the highest pH? Assume that they are all 0.10 M in acid at 250C. The acid is followed by its Ka value. A) HF, 3.5 x 10-4 B) HCN, 4.9 x 10-10 C) HN02, 4.6 × 10-4 D) Halo2, 1.8 × 104 @mcio2. 1.1 × 10-2 10) Which of the following is TRUE? A) A neutral solution contains [H20]-[H30* ] B) An neutral solution does not contain any H30+ or OH An acidic solution has [H3O ] 0H ] D) A basic solution does not contain H30 E) None of the above are truc. ) What is the ph of pure water at 40.0°C if the Kay at this temperature is 2.92 * 10-14 0.465 C) 7.000 D) 7.233 E) 8.446 12) Calculate the concentration of OH in a solution that contains 3.9 x 104 M H30 at 25°C. Identify the solution as acidie, basic or neutral. 2.6× 10-11 M, acidic 2.6 x 10-11 M, basic C) 3.9 x 10-4 M, neutral 3o ^ 3.AX,-4 M D)2.7×10-2 M, basic E)2.7×10-2 M, acidic

Explanation / Answer

7)
HClO4 is strong acid
Answer: C

8)
HCOOH is weak acid
Answer: D

9)
The one with smaller Ka value will be weaker acid
Hence the pH will be smaller for it
Such an acid is HCN
Answer: B

10)
For neutral solution, [H3O+] = [OH-]
For acidic solution, [H3O+] > [OH-]
For basic solution, [H3O+] < [OH-]
Answer: C

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