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Mobile App Chapter 20: Q27P (page 1073)
Question: Draw the structures of the following compounds.
- propanoic acid
- phthalic acid
- calciumformate
- succinic acid
- dibromoacetic acid
- acetylsalicylate (aspirin)
- zincdecanoate (athlete's-foot powder)
- potassium benzoate (a food preservative)
- potassium fluoroacetate
Short Answer
Answer
a.
b.
c.
d.
e.
f.
g.
h.
i
Step by step solution
Structure of compounds
The structure of compounds is drawn by looking at the IUPAC name of the compound.The number of carbon atoms and functional groups attached to them is known from the compound's name.
The structure of propanoic acid
a. In propanoic acid, the 'propan' word is used for three carbon-containing compounds, and 'oic acid' means –COOH functional group. So, the structure of propanoic acid is shown as,
Structure of propanoic acid
The structure of phthalic acid
b. Phthalic acid is an aromatic compound containing two –COOH functional groups, and the other name for phthalic acid is benzene dicarboxylic acid. The two carboxyl groups are present at the ortho position. The chemical formula for phthalic acid is C6H4 (COOH)2 , and the structure is shown as,
Structure of phthalic acid
The structure of calcium formate
C. Calcium formate is a compound containing calcium salt with a +2 charge and HCO O- (formate ion). So, to balance the charge on both sides, two formate ions are there in calcium formate. The chemical formula for calcium formate is Ca (COOH)2 , and the structure is shown as,
Structure of calcium formate
The structure of succinic acid
d. Succinic acid is a compound containing two carboxylic acids, and the chain comprises a total of 4 carbon atoms. The other name for succinic acid is butanedioic acid. The chemical formula for succinic acid is (CH2 )2 (C00H)2 , and the structure is shown as,
Structure of succinic acid
The structure of dibromoacetic acid
e. Dibromoacetic acid is a compound in which two bromine atoms replace two hydrogens of the methyl group of acetic acid (CH3 COOH). The chemical formula for dibromoacetic acid is C2H2Br2CO2 , and the structure is shown as,
Structure of dibromoacetic acid
The structure of acetylsalicylate (aspirin)
f. Acetylsalicylate (aspirin) is a compound formed by deprotonation of the carboxy group of acetylsalicylic acid. The chemical formula for this compound is C6H4 (CH3 COO)COO- , and the structure is shown as,
Structure of acetylsalicylate (aspirin)
The structure of zincdecanoate
g. Zincdecanoate is a compound containing Zn cation with a +2 charge and decanoate anion (C10H19O2-). So, to balance the charges, two deconate anions are used. The chemical formula for this compound is (C10H19O2-)2 Zn+ , and the structure is shown as,
Structure of zincdecanoate
The structure of potassium benzoate
h. Potassium benzoate is a compound containing potassium (K+) cation and benzoate anion (C7H1202-). The charges of both the ions are balanced. The chemical formula for this compound is C7H1202- K+ , and the structure is shown as,
Structure of potassium benzoate
The structure of potassium fluoroacetate
I. Potassium fluoroacetate contains potassium (K+) cation and fluoroacetate anion. The fluoroacetate anion is formed when one hydrogen of methyl group of acetate ion is replaced by an F atom (FCH2CO2-). The charges of both the ions are balanced. The chemical formula for this compound is FCH2CO2-K+ , and the structure is shown as,
Structure of potassium fluoroacetate
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