How do i solve question 4? Lead poisoning is a serious condition resulting from

Question

How do i solve question 4?

Lead poisoning is a serious condition resulting from the ingestion of lead in food, water, or other environmental sources. It affects the central nervous system, leading to a variety of symptoms such as distractibility, lethargy, and loss of motor coordination. Lead poisoning is treated with chelating agents, substances that bind to metal ions, allowing them to be eliminated in the urine. A modern chelating agent used for this purpose is succimer (C4H604S2) 4. Suppose you are trying to determine the appropriate dose for succimer treatment of lead poisoning. What minimum mass of succimer (in mg) is needed to bind all of the lead in a patient's bloodstream? Assume that patient blood lead levels are 0.45 mg/mL, that total blood volume is 5.0 L, and that 1 mole of succimer binds 1 mole of lead.

Explanation / Answer

Total volume of blood = 5.0 L = 5000 ml

Blood lead level = 0.45 mg/ml

If 1 ml contains 0.45 mg lead, then 5000 ml of blood would contain = 5000*0.45 = 2250 mg of lead = 2.250 g of lead

Molar mass of lead = 207 g/mol

Moles of lead = mass/molar mass = 2.250/207 = 0.011 mol

1 mole of lead needs 1 mol of succimer.

So, moles of succimer needed = 0.011 mol

Molecular formula of succimer is C4H6O4S2

Molar mass of succimer = 4(12)+6(1)+4(16)+2(32) = 182 g/mol

Mass of succimer in 0.011 mol = 182*0.011 = 2.00 g

Mass of succimer needed = 2.00 g = 2000 mg

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