Explain what is the concentration of lead

Reference no: EM13212420

Lead in a sample was determined by Atomic Absorption using the method of standard addition. All the lead in a 25.00 mL portion of the sample was extracted into 10.00 mL of an organic solvent resulting in A = 0.315. To a second 25.00 mL part, 10.00 mg of lead was added and extracted into a second 10.00 mL portion of the same organic solvent. This solution gave A = 0.525. What was the concentration of lead, in mg/mL, in the original sample?

Reference no: EM13212420

Questions Cloud

How much does the second annuity pay each year : The applicable discount rate is 7 percent. One annuity pays $4,000 on the first day of each year for twenty years. How much does the second annuity pay each year for twenty years if it pays at the end of each year.

Determine the rate of heat loss from the molten salt : Determine the rate of heat loss from the molten salt per meter length of the pipe.

Determine the engine block surface temperature\ : An engine block with a surface area measured to be 0.90m2 generates a power output of 55 kW with a net engine efficiency of 35%. The engine block operates inside a compartment at 157oC and the average convection heat transfer coefficient of 60 W/m..

Explain what is the concentration of a solution made : What is the concentration of a solution made from 15ml of 2.0M HBrO, 20.0ml of H20, and 9.7g HBrO (mm=97g/mol)

Explain what is the concentration of lead : To a second 25.00 mL part, 10.00 mg of lead was added and extracted into a second 10.00 mL portion of the same organic solvent. This solution gave A = 0.525. What was the concentration of lead, in mg/mL, in the original sample?

How the doctors are more productive than nurses : A clinic uses doctors and nurses optimally and is servicing the maximum number of patients given a limited annual payroll. The last doctor hired treated 1,600 extra patients in a year, while the last nurse hired treated 1,000 extra patients in a y..

Compute the ionic strength solution of acetic buffer : Calculate the ionic strength of 100mM solution of Mg3(PO4)2 in acetic buffer

What cost to invest in either option is the same day : The cost to invest in either option is the same today. Both options will provide you with $20,000 of income. Option A pays five annual payments starting with $8,000 the first year followed by four annual payments of $3,000 each.

Explain which hplc mode you will choose and why : separate a mixture of alkane. which HPLC mode you will choose and why? ( Consider Normal-phase, ion- exchange, and size-exclusion).

User Account

All Pages