Lead Poisoning Used to Be Treated by Injections of Ethylenediaminetetraacetic

question 139

Multiple Choice

Lead poisoning used to be treated by injections of ethylenediaminetetraacetic acid, EDTA. If the concentration of EDTA in the blood of a patient is 3.0 *10^-7 M and the formation constant for Pb(EDTA) ^2- is 2.0 *10¹⁸, what is the concentration ratio of free toxic Pb²⁺ to lead-EDTA complex in the blood?

• A) 2.0 *10^-11
• B) 1.7 * 10^-12
• C) 2.0 *10^-9
• D) 5.0 *10^-19
• E) 3.0 F* 10^-9

---

Definitions:

Days' Sales Uncollected

A financial ratio that indicates the average number of days it takes a company to collect payment after a sale has been made.

Inventory Turnover

A ratio showing how often a company's inventory is sold and replaced over a certain period.

Accounts Receivable Turnover

A financial ratio that measures a company's effectiveness in collecting its receivables or the money owed by clients.

Financial Statement Analysis

The practice of examining and evaluating a firm's financial reports to improve financial decision-making.