28. What is the hydronium ion concentration of a 0.010 M solution of acetic acid

Question

28. What is the hydronium ion concentration of a 0.010 M solution of acetic acid? K, for acctic acid i 1.8 × 10-5 a. 1.8 x 103 b. 1.8 x 10 c. 1.0 x 102 d. 1.8 x 10-7 e. 4.2 x 104 29. What is the pH of a 0.010 M solution of acetic acid? K, for acetic acid is 1.8 x 10s a. 2.74 b. 4.74 c. 2.00 d. 3.37 e. 6.74 30. What is the concentration of [OH ] in a 0.20 M solution of ammonia? The K, value for ammonia is 1.8 x 10- a. 3.6 x 106 M b. 1.8 x 10s M c. 0.20 M 1.9 x 103 M 4.2 x 104 M d. c. 31. What is the pOH of a 0.20 M solution of ammonia? The K, value for ammonia is 1.8 x 10 a. 4.44 b. 4.74 c. 0.70 d. 2.72 c. 3.38 32. What is the pH of a 0.500 M solution of trimethylamine (pK,-4.13)? a. 2.22 d. 4.42 c. 5.91 c. 0.00609 33. What is the pH of a 0.20 M solution of ammonia? The K, value for ammonia is 1.8x 10s. a. 9.56 b. 9.26 c. 4.74 d. 11.28 e. 2.72

Explanation / Answer

28)

Solution:- Using the equation

pH= pKa+ log ([salt]/[acid])

as the concentrations are the same (buffer solution) the pH= pKa+log 1
and log 1=0 so pH=pKa

pKa= log1/1.8*10^-5=4.744

Now [H3O+] = 10-pH

=1.80*10^-5

Option B IS CORRECT

Related Questions

Navigate

• Browse (All)
• Browse 2
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.