Assume negliglible ionization to determine the percent

Question

Assume negliglible ionization to determine the percent ionization of each of the following acids and then indicate whether the assumption was valid.

a) 0.030 M solution of cyannic acid (HCNO, pK_a = 3.46)

% ionization = valid: 

---Select---

Yes

No

b) 0.0043 M solution of hydroazoic acid (HN₃, pK_a = 4.60)

% ionization = valid: 

---Select---

Yes

No

c) 0.010 M solution of benzoic acid (HC₇H₅O₂, pK_a = 4.19)

% ionization = valid: 

---Select--

Yes

No