What is the pka1 of maleic acid?
Its chemical formula is HO2CCH=CHCO2H. Maleic acid is the cis-isomer of butenedioic acid, whereas fumaric acid is the trans-isomer….Maleic acid.
What is the formula of maleic acid?
C4H4O4Maleic acid / Formula
Maleic acid or cis-butenedioic acid is an organic compound that is a dicarboxylic acid, a molecule with two carboxyl groups. Its chemical formula is HO2CCH=CHCO2H.
What happens when you heat maleic acid?
Maleic acid melts at 139–140° C (282–284° F); at higher temperatures it forms the anhydride, which, like the acid, is irritating to the skin and toxic. Maleic anhydride is interchangeable with the acid in most applications.
What is the chemical formula of butenedioic acid?
C4H4O4Fumaric acid / Formula
What is the Ka of malic acid?
Malic acid is a diprotic acid, whose pKa at 25°C are 3.40 and 5.11 (Lide, 2005).
How many PKAS does malic acid have?
Since malic and tartaric acid both have two protons which may be lost to the solution, there are two pKa values for each acid. For malic acid, the pka values are 3.4 and 5.2 and for tartaric acid, the pka values are 2.95 and 4.25.
What type of compound is HCO2H?
Formic Acid (also called methanoic acid) is the simplest carboxylic acid. Its chemical formula is HCOOH or HCO2H. It is an important intermediate in chemical synthesis and occurs naturally, most notably in ant venom.
Why is maleic acid acidic?
Maleic acid is cis-butenedioic acid whereas fumaric acid is trans-butenedioic acid. Maleic acid is able to lose ion and it results in the formation of intra-hydrogen bond. Whereas fumaric acid being a trans isomer has strong interaction with both the oxygen atoms of each carboxylic group.
What is the pH of maleic acid?
Pricing & Availability
|Density||1.59 g/cm3 (20 °C)|
|Melting Point||130 – 135 °C|
|pH value||1.3 (100 g/l, H₂O, 20 °C)|
|Vapor pressure||<0.1 hPa (20 °C)|
What is the empirical formula of fumaric acid?
Does butenedioic acid show geometrical isomerism?
The molecule with the two large groups on the same side of the double bond is called cis-, and if these two groups are across the double bond it is called trans-. A good example of geometric isomerism is seen with butenedioic acid.
Can Ka be negative?
pKa=-log10(Ka). The log10 of a number greater than 1 is positive. log10 of a number less than 1 is negative. Since you already have a minus sign in your formula for pKa, strong acids with a Ka (much) greater than one will have a negative pKa and weak acids for which the Ka is less than one will have a positive pKa.