The Following Question Refers to a Solution That Contains 1 $\times$

question 64

Multiple Choice

The following question refers to a solution that contains 1.99 M hydrofluoric acid,HF (K_a = 7.2 $\times$ 10^-4) ,and 3.00 M hydrocyanic acid,HCN (K_a = 6.2 $\times$ 10^-10) . Determine the [CN^-] at equilibrium.

• A)1.9 \(\times\) 10^-9 M
• B)3.8 \(\times\)10^-2 M
• C)4.9 \(\times\) 10^-8 M
• D)6.2 \(\times\) 10^-10 M
• E)none of these

---

Definitions:

Wild Species

Plant and animal species that exist naturally in the wild, untouched by domestication or genetic modification.

Medicinal Benefits

The health advantages gained from the consumption or use of drugs, plants, or other substances with therapeutic properties.

Precautionary Strategy

An approach to decision-making that emphasizes preventive action in the face of uncertainty, aiming to minimize risks.

Captive Breeding

The process of breeding animals in controlled environments within zoos, wildlife reserves, or other facilities to preserve endangered species.