Carboxylic Acid Functional Group Molecules
SKU: 68845NV
Build accurate 3D carboxylic acid structures with the 68845NV Organic Chemistry molecular model set. Ideal for studying acid-base chemistry, esterification, and biological molecules like fatty acids and amino acids.
Carboxylic acids are central to both synthetic chemistry and life’s energy pathways. In particular, how citric acid fuels the Krebs cycle or how fatty acids form cell membranes. This model kit helps students connect structure to role and function across different scientific perspectives.
The 68845NV student model set includes 16 carbons and 18 hydrogens which will allow you to build a variety of carboxylic acid structures. These are important basics for both organic chemistry and biochemistry. You can build any of the essential amino acids with this set.
Carboxylic Acid Functional Group: Comparison of Educational Needs
| Compound | Chemistry Focus | Biology / Medicine / Nursing Focus |
|---|---|---|
| Formic acid (HCOOH) | Smallest carboxylic acid; strong hydrogen-bond donor; easily oxidized; forms formate salts/esters. | Found in insect venoms; occupational/toxic exposure risk (skin/eye irritation); simple model for acid/base teaching. |
| Acetic acid (CH3COOH) | Prototype monocarboxylic acid; pKa 4.76; forms acetates; nucleophilic acyl substitution chemistry. | Vinegar component; acetyl group donor in metabolism (acetyl-CoA relevance); topical antiseptic use and industrial safety. |
| Propionic acid (C2H5COOH) | Short-chain fatty acid (SCFA); similar reactivity to acetic acid; used in esterification and carbonation studies. | Produced by gut microbes; food preservative; implicated in gut–brain axis research and metabolic signaling. |
| Butyric acid (C3H7COOH) | SCFA with strong odor; important in fermentation chemistry and colonic epithelial energy metabolism. | Major energy source for colonocytes; anti-inflammatory effects in the gut; relevance to post-antibiotic recovery and IBS. |
| Benzoic acid (C6H5COOH) | Aromatic carboxylic acid; resonance-stabilized; undergoes electrophilic substitution on ring and formation of benzoates. | Common preservative (benzoates); low acute toxicity but allergy/irritation considerations; environmental persistence notes. |
| Salicylic acid (o-hydroxybenzene-carboxylic acid) | Phenolic + carboxylic functionality; acid/base chemistry and intramolecular hydrogen bonding; precursor to esters. | Topical keratolytic and acne treatment; nasal/skin irritation potential; parent compound of aspirin (acetylation reduces irritation). |
| Acetylsalicylic acid (Aspirin) | Acetylated salicylate ester of a carboxylic acid; undergoes hydrolysis to salicylate; irreversible COX acetylation chemistry. | Analgesic/antipyretic/antiplatelet; dosing and bleeding-risk considerations; rapid absorption and metabolic pathways important clinically. |
| Lactic acid (2-hydroxypropanoic acid) | Hydroxy carboxylic acid; exists as L/D enantiomers; substrate in redox chemistry (lactate/pyruvate interconversion). | Marker of anaerobic metabolism (lactate); topical uses in dermatology; metabolic acidosis guidance and exercise physiology relevance. |
| Citric acid (2-hydroxypropane-1,2,3-tricarboxylic acid) | Tri-carboxylic acid; chelating properties; central in chelation and buffering; key TCA cycle intermediate. | Core of cellular energy metabolism (Krebs cycle); used as food additive and anticoagulant in blood collection; metabolic and rehydration contexts. |
| Oxalic acid (C2O4H2) | Small dicarboxylic acid; strong chelator of calcium (forms insoluble oxalates); crystalline salt formation. | Kidney stone formation risk (calcium oxalate); plant-derived exposure considerations; stone prevention counseling. |
| Succinic acid (butanedioic acid) | Dicarboxylic TCA cycle intermediate; participates in redox-linked metabolic steps and anhydride chemistry. | Metabolic intermediate in energy pathways; used in some clinical formulations; relevance to mitochondrial function and sepsis research. |
| Palmitic acid (C16:0) | Common saturated long-chain fatty acid; hydrophobic tail chemistry, melting point and packing/van der Waals trends. | Major dietary saturated fat; membrane lipid component; implications for inflammation, metabolic disease, and wound/skin formulations. |
| Oleic acid (C18:1 cis-9) | Monounsaturated fatty acid; Cis-double bond introduces kink affecting packing and fluidity; undergoes oxidation chemistry. | Heart-healthy MUFA; membrane fluidity and signaling; used in topical emollients and nutrition counseling. |
| Arachidonic acid (20:4(ω−6)) | Polyunsaturated fatty acid (PUFA); precursor to eicosanoids via COX/LOX pathways; sensitive to peroxidation. | Source of prostaglandins/leukotrienes (inflammation, pain); clinical relevance to anti-inflammatory drugs and nutrition balance. |
| Aspartic acid / Glutamic acid (acidic amino carboxylic acids) | Amino acids bearing carboxylate side chains at physiological pH; acid-base behavior, zwitterions, and side-chain reactivity. | Neurotransmitter precursors and metabolic roles; clinical relevance in amino-acidopathies, nutrition, and acid–base disturbances. |
Important Learning Outcomes
Chemistry Majors Should be Able to:
- Understand the structure of carboxylic acids, featuring both carbonyl (C=O) and hydroxyl (-OH) groups on the same carbon.
- Describe the trigonal planar geometry around the carbonyl carbon and its influence on reactivity.
- Explain acid-base behavior, esterification reactions, and hydrogen bonding.
- Use molecular models to explore resonance stabilization and tautomerism related to carboxylic acids.
Biology, Nursing & Premed Majors Should be Able to:
- Recognize carboxylic acids as key components of biomolecules such as fatty acids and amino acids.
- Understand their role in metabolism, including energy storage (lipids) and protein structure.
- Appreciate the importance of acid-base chemistry in physiological pH balance and drug activity.
Key Features & Benefits of the Orbit framework organic chemistry molecular model kit for Teaching Carboxylic Acids
| Feature | Benefit |
|---|---|
| Accurate trigonal planar geometry for the carbonyl carbon | Helps students visualize molecular shape and predict reactivity in acid-base and esterification reactions. |
| Distinctive color-coded oxygen atoms | Clarifies the difference between hydroxyl and carbonyl oxygen atoms in the same group. |
| Interchangeable components | Allows easy transformation into related groups like esters or amides for teaching functional group interconversion. |
| Durable Orbit connectors | Provides long-lasting use for classroom demonstrations or lab exercises. |
| Cross-disciplinary relevance | Links chemical structure to biological molecules like fatty acids and amino acids. |
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