Ch.16 - Aqueous Equilibrium WorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: Ethylenediaminetetraacetic acid (abbreviated H 4EDTA) is a tetraprotic acid. Its salts are used to treat toxic metal poisoning by forming soluble complex ions that are then excreted. Because EDTA4− al

Problem

Ethylenediaminetetraacetic acid (abbreviated H 4EDTA) is a tetraprotic acid. Its salts are used to treat toxic metal poisoning by forming soluble complex ions that are then excreted. Because EDTA4− also binds essential calcium ions, it is often administered as the calcium disodium salt. For example, when Na2Ca(EDTA) is given to a patient, the [Ca(EDTA)] 2− ions react with circulating Pb2+ ions and the metal ions are exchanged:

[Ca(EDTA)]2−(aq) + Pb 2+(aq) ⇌ [Pb(EDTA)] 2−(aq) + Ca 2+(aq)     K c = 2.5 × 10 7

A child has a dangerous blood lead level of 120 μg/100 mL. If the child is administered 100. mL of 0.10 M Na2Ca(EDTA), what is the final concentration of Pb 2+ in μg/100 mL blood, assuming that the exchange reaction and excretion process are 100% efficient? (Total blood volume is 1.5 L.)