211. What is the a. 0.0016 M b. 0.0032 M c. 0.032 M d. 0.016 M e. 0.16 M concentration of NaOH in a 2.0L solution of water with a pH of 11.5?

Calculate the pH of a 0.50 M aqueous solution of HF. (Ka 7.2 x 10-4) A. 3.6 x 10-4 B. 0.019 C. 1.7 D. 3.4

What is the pH of .00055 M soln of NaOH?   A. 3.3 B. 1.3 E-3 C. 10.7 D. 1.55 E-7

T he pH of aqueous 0.050M trimethylamine is 11.24, what is the K b of this base?  Trimethylamine dissociates similar to ammonia in aqueous solutions.   a. 6.6 x 10-22   b. 2.76   c. 6.3 x 10-5   d. 1.7 x 10-3   e. 5.8 x 10-12

What is the pH of a solution prepared by diluting 0.75 mol HNO3(aq) to a volume of 75 mL? (Hint: calculate molarity of HNO3 first) A. -0.25 B. 1.0 C. 0.040 D. 0.75 E. 0.225

14.What is the k a of a monoprotic weak acid if a 0.213 M solution has a pH of 2.876?   A. 1.77x10-6   B. 1.33x10-3   C. 1.21x105   D. 1.21x10-6   E. 8.25x10-6

5. Acetic acid is a weak monoprotic acid. Its concentration is 0.20 M and its Ka value is 1.8x10- Calculate its pH value. a. 0.698 b. 2.72 c. 11.28 d. none of the answer are correct 6. Naz CO; forms alkaline solution when dissolved in water. Why? a. Because water hydrolysis produces hydroxide b. CO32- ions reacts with H from water to produce HCO;- c. Naz CO; dissociates completely to produce CO;2-ions d. CO3?- ions reacts with water to produce carbonic acid The buffar celutien nintoing nH

2. Find the pH of the following weak acids: a. 0.088 M HF b. 0.34 M HNO₂ c. 0.072 M HCIO,

What is the pH of a solution prepared by dissolving 0.075 mol of Ba(OH)2 in water to give 455 mL of solution? A. 13,52 O B. 0.48 OC0.78 O D. 12.92 OE 13.22

The pH after adding 20.0 mL of 1.0 M NaOH to 25.0 mL of 1.0 M HCl is a. 0.95 b. 0.11 c. 0.70 d. 13.0