You have 50 ml of a complex mixture of weak acids that contains some HF (pKa = 3.18) and some HCN (pKa = 9.21). Which is larger, [F-]/[HF] or [CN-]/[HCN]?

is larger

Explanation:

, where is the acid dissociation constant.

For a monoprotic acid e.g. HA, and

So, clearly, higher the value , lower will the the

In this mixture, at equilibrium, will be constant.

of HF is grater than of HCN

Hence,

So, is larger

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.