What is the Ka of picric acid?

What is the Ka of picric acid?

What is the Ka of picric acid?

Ionization Constants of Heteroatom Organic Acids

Common Name Formula Acidity Constant
methanesulfonic acid CH3SO3H ca. 3 * 102
trifluoroacetic acid CF3CO2H 1.0
picric acid (O2N)3C6H2OH 0.5
squaric acid K1 = 0.33 K2 = 3.3 * 10-4

What is the unfortunate property of picric acid?

Picric acid is toxic if swallowed, inhaled, or absorbed through the skin. Inhalation of dust may cause lung damage. Chronic exposure may cause liver or kidney damage. It is irritating to the skin and eyes and may cause an allergic skin reaction.

Why is Trinitrophenol called picric acid?

2,4,6-Trinitrophenol is highly acidic in nature as three electron withdrawing groups (Nitro group) are attached to it. These electron withdrawing groups on phenol make it highly acidic. That’s why it is known as picric acid.

How do you convert pKa to Ka?

How do you calculate Ka from pKa? To create a more manageable number, chemists define the pKa value as the negative logarithm of the Ka value: pKa = -log Ka. If you already know the pKa value for an acid and you need the Ka value, you find it by taking the antilog.

How do you remove picric acid?

  2. Deparaffinize and take to 70% alcohol.
  3. Place in 0.5% hydrochloric acid in 70% alcohol until yellow color is removed.
  4. Wash well in running water and rinse in two changes of distilled water.
  5. Stain as desired.

Is picric acid Safe?

As a last consideration, Picric Acid is toxic. Ingestion of 1-2 grams would cause severe poisoning. The dust is irritating to the skin and eye. A peculiar effect on the eye is “yellow” tainted vision.

What color does picric acid make?

picric acid, also called 2,4,6-trinitrophenol, pale yellow, odourless crystalline solid that has been used as a military explosive, as a yellow dye, and as an antiseptic.

What is a picric acid bomb?

Picric acid is in the same family of nitroaromatic explosives as trinitrotoluene (TNT). It is no longer used as an explosive because of this type of reaction. A shock-insensitive explosive compound that forms shock-sensitive explosive salts with metals (such as lead) is too unwieldy for most usual applications.