How many Ka values does maleic acid have?
Question: The Ka values of maleic acid, H2OOCCHCHCOO, are : Ka1 = 1.5×10-2; Ka2 = 2.6×10-7 What is the pH of 0.10 sodium maleiate, Na2OOCCHCHCOO?
What is the Ka of Cyanoacetic acid?
Ka for cyano acetic acid is 3.5×10 to the power -3.
How is maleic acid produced?
Maleic acid and its anhydride are prepared industrially by the catalytic oxidation of benzene. Maleic acid shows reactions typical of both olefins and carboxylic acids. It is produced by isomerization of maleic acid or by fermentation of molasses.
Why is maleic acid more soluble in water than fumaric?
Maleic acid is the cis-isomer of butenedioic acid, whereas fumaric acid is the trans-isomer. Maleic acid is more soluble in water than fumaric acid. The melting point (135 °C) is also much lower than that of fumaric acid (287 °C).
What are the Ka and pKa of maleic acid?
The known ka and pka values for maleic acid are as follows; Ka1: 1.2×10-2 Pka1: 1.92 Ka2: 4.7×10-7 Pka2: 6.33 Gilbert, Kirss, Foster, and Davies. Since pKa2 = 7.21 is closest to 7.0, H2P04-/HPot will be … Source of data: CRC Handbook of Chemistry and Physics, 84th Edition (2004).
How does the pH of maleic acid change?
Maleic acid is a weak diprotic acid that can dissociate stepwise as shown in equations (1) and (2). + (2) As the acid is titrated with strong base, the pH changes in a characteristic way giving rise to a 2-step titration curve. The rate of change of H+ ion concentration increases until it reaches a maximum rate at the equivalence point.
What’s the difference between fumaric acid and maleic acid?
Maleic acid is an organic compound which is a dicarboxylic acid (molecule with two carboxyl groups). The molecule consists of an ethylene group flanked by two carboxylic acid groups. Maleic acid is the cis isomer of butenedioic acid, whereas fumaric acid is the trans isomer. The cis isomer is the less stable one of the two; the difference in
What kind of double bond does maleic acid have?
Maleic acid is a butenedioic acid in which the double bond has cis- (Z)-configuration. It has a role as a plant metabolite, an algal metabolite and a mouse metabolite. It is a conjugate acid of a maleate(1-) and a maleate. Maleic acid is a colorless crystalline solid having a faint odor. It is combustible though it may take some effort to ignite.