Domanda del libro di testo
What are the molarity and the normality of a solution made by dissolving 25 g of citric acid (triprotic, C6H5O7H3) in enough water to make 800 mL of solution?
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Ch.10 Acids and Bases
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187
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TOC.tableOfContents
- Ch.1 Matter and Measurements27
- Ch.2 Atoms and the Periodic Table20
- Ch.3 Ionic Compounds8
- Ch.4 Molecular Compounds23
- Ch.5 Classification & Balancing of Chemical Reactions12
- Ch.6 Chemical Reactions: Mole and Mass Relationships28
- Ch.7 Chemical Reactions: Energy, Rate and Equilibrium64
- Ch.8 Gases, Liquids and Solids24
- Ch.9 Solutions52
- Ch.10 Acids and Bases25
- Ch.11 Nuclear Chemistry22
- Ch.12 Introduction to Organic Chemistry: Alkanes57
- Ch.13 Alkenes, Alkynes, and Aromatic Compounds47
- Ch.14 Some Compounds with Oxygen, Sulfur, or a Halogen50
- Ch.15 Aldehydes and Ketones45
- Ch.16 Amines42
- Ch.17 Carboxylic Acids and Their Derivatives57
- Ch.18 Amino Acids and Proteins82
- Ch.19 Enzymes and Vitamins63
- Ch.20 Carbohydrates44
- Ch.21 The Generation of Biochemical Energy65
- Ch.22 Carbohydrate Metabolism45
- Ch.23 Lipids42
- Ch.24 Lipid Metabolism33
- Ch.25 Protein and Amino Acid Metabolism24
- Ch.26 Nucleic Acids and Protein Synthesis45
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187Non è quello che usi tu?Cambia libro di testo
Capitolo 10, Problema 84b
Identify the number of equivalents per mole for each of the following acids and bases.
b. H3PO4
Guida verificata passo dopo passo1
Identify the definition of equivalents in the context of acids and bases. For acids, the number of equivalents per mole corresponds to the number of hydrogen ions (H⁺) the acid can donate per molecule.
Examine the chemical formula of the acid, H₃PO₄ (phosphoric acid). The subscript '3' in H₃ indicates that the molecule contains three hydrogen atoms that can potentially be donated as H⁺ ions.
Determine whether all three hydrogen atoms in H₃PO₄ are ionizable. In this case, H₃PO₄ is a triprotic acid, meaning it can donate up to three H⁺ ions per molecule in a stepwise manner.
Conclude that the number of equivalents per mole for H₃PO₄ is equal to the number of ionizable hydrogen atoms, which is 3.
To summarize, the number of equivalents per mole for H₃PO₄ is 3, as it can donate three H⁺ ions per molecule.
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Equivalents in Acid-Base Chemistry
In acid-base chemistry, an equivalent refers to the amount of a substance that can donate or accept one mole of protons (H⁺ ions). For acids, the number of equivalents per mole is determined by the number of protons the acid can donate. This concept is crucial for understanding the strength and reactivity of acids and bases in various chemical reactions.
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00:46
Acid-Base Equivalents Concept 2
Phosphoric Acid (H₃PO₄)
Phosphoric acid (H₃PO₄) is a triprotic acid, meaning it can donate three protons (H⁺ ions) in solution. Each proton donation corresponds to one equivalent, so H₃PO₄ has three equivalents per mole. This property is important for calculating the acid's reactivity and its role in buffer solutions and other chemical processes.
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02:42Naming Acids Example 2
Molarity and Concentration
Molarity is a measure of concentration defined as the number of moles of solute per liter of solution. Understanding molarity is essential when discussing equivalents, as it allows for the calculation of how many equivalents of an acid or base are present in a given volume of solution. This concept is fundamental in titration and other quantitative chemical analyses.
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00:53Molarity
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