Question

The self ionization constant for pure formic acid $ K = {\text{ }}\left[ {HCOO{H^ + }_2} \right]\left[ {HCO{O^ - }} \right] $ has Been estimated as $ {10^{ - 6}} $ at room temperature the density of formic acid is 1.15g/cm3. What percentage of formic acid are converted to form ion?
 $ \begin{array}{*{20}{l}}
  {A) - {\text{ }}0.002\% } \\
  {B) - {\text{ }}0.004\% } \\
  {C) - {\text{ }}0.006} \\
  {D) - {\text{ }}0.008\% }
\end{array} $

Answer 1

Hint :The acid, systematically named methanoic acid, the simplest acid, which has the formula $ HCOOH $ . Which is very important intermediate in chemical synthesis and occurs naturally, most notably in some ants.

Complete Step By Step Answer:
This is a vital intermediate in chemical synthesis and occurs naturally, most notably in some ants. The word "formic" comes from the Latin word for ant, formica, bearing on its early isolation by the distillation of ant bodies. Esters, salts, and also the anion derived from acid are called formats. Industrially, acid is produced from methanol.
Density of formic acid= $ 1.15g/cm3 $
So when it is converted as a percentage of formic acid to formate ion is
= 0.004%
Hence, option B Is the correct answer.

Additional Information:
Formate (IUPAC name: methanoate) which is an anion derived from acid. Which can be represented in various ways: $ HCOO - {\text{ }}or{\text{ }}CHOO - {\text{ }}or{\text{ }}HCO2 - . $ This is the merchandise of deprotonation of acid. So that is only carboxylate anion. A formate (compound) which could be a salt or ester of acid.

Note :
Acid is then converted with methanol into methyl formate, which is catalytically ... Although FA incorporates a relatively low energy density compared to ... or a toxic substance, that doesn't mean acid isn't harmful.