Find out the concentration of pb2

Assignment Help Chemistry
Reference no: EM13290520

A spectrophotometric method for the quantitative determination of the concentration of Pb2+ in blood levels yields and Ssample of 0.19 for a 1.0 mL sample of blood that has been diluted to 5.0 mL. A second 1.0 mL sample is spiked with 2.0 microliters of a 1000 ppb Pb2+ standard and diluted to 5.0 mL, yielding an Sspike of 0.4. Determine the concentration of Pb2+ in the original sample of blood.

Reference no: EM13290520

Questions Cloud

Explain what is the molar mass of the unknown substance : A solution containing .2g of an unknown substance in 2.5 g of cyclohexane is found to freeze at 5.1 C what is the molar mass of the unknown substance
What are some external quality management organizations : What are some external quality management organizations? What value do these organizations bring to each of their targeted industries? How does their presence enhance the particular industry they target?
Estimate the temperature rise of the iron nail : Consider a hammer with a 1.2-kg head. Let it strike the head of a 12-g iron-alloy nail 16 times in a row, quickly. estimate the temperature rise (in degrees Celsius) of the iron nail
Find minimum speed will allow the ball to clear the roof : You're 6.0 m from one wall of a house. You want to toss a ball to your friend who is 6.0 m from the opposite wall. The throw and catch each occur 1.0 m above the ground. find minimum speed will allow the ball to clear the roof
Find out the concentration of pb2 : A second 1.0 mL sample is spiked with 2.0 microliters of a 1000 ppb Pb2+ standard and diluted to 5.0 mL, yielding an Sspike of 0.4. Determine the concentration of Pb2+ in the original sample of blood.
Created and configured in the webmethods : How the qeues will be created and configured in the webmethods and how can we sending with our business partenrs and how we can acheive it throgh the trading networks so please explain properly the scenario.
What happens to the bright fringes : Monochromatic light is incident from the top onto two glass plates, as the drawing shows. What happens to the bright fringes
State triplicate analysis of the material by a new procedure : The accepted value (mu) for a standard sample of chloride was 34.63 percent chloride. Triplicate analysis of this material by a new procedure yielded a mean value of 34.71 and an estimated standard deviation of 0.04
Evaluate the acceleration of the system : Two blocks connected by a rope of negligible mass are being dragged by a horizontal force. Suppose F = 65.0 N, m1 = 10.0 kg, m2 = 26.0 kg, evaluate the acceleration of the system

Reviews

Write a Review

Chemistry Questions & Answers

  What is the molarity of hno3

a 25 ml of sample of HNO3 is neutralized by 32.1 ml of 0.150 M KOH(aq). What is the molarity of HNO3?

  Prepare a mold for casting a bronze figure

A sculptor has prepared a mold for casting a bronze figure. The figure has a volume of 225 mL. If bronze has a density of 7.8 g/mL

  Determine the temperature the reaction is spontaneous

For a reaction in which delta H= -360.1 kJ/mol and delta= - 90.0 J/K*mol, determine the temperature (in *C) below which the reaction is spontaneous.

  Explain the molality of a solution consisting benzene

What is the molality of a solution consisting of 67.3 mL of benzene (C6H6; d=0.877 g/mL) in 227 mL of hexane (C6H14; d=0.660 g/mL)

  Explain the simplest carbene known is methylene

The simplest carbene known is methylene. The non-bonded electrons can be paired (singlet methylene) or unpaired (triplet methylene).

  Write a balanced net ionic equation also describe

Write a balanced net ionic equation and describe one of the ways for which Cd2+ will interfere with the determination of copper.

  State the specific heat capacity of the solution produced

The specific heat capacity of the solution produced was 4.20J/g*Celcius, and final temp reached was 34.91 degrees c. How much heat was produced by the dissolution

  Define what is the new freezing point of a solution

What is the new freezing point of a solution with 100.g of CaCl2 in every kg of water? The Kf of water is 1.86 degrees celsius/m. Solve the problem.

  How many moles of oxygen are necessary to react

C3h8+5o2=3co2+4h2o How Many Moles Of Oxygen Are Necessary To React Completely With Four Moles Of Propane?

  Compute the molarities of the hclo4 and naoh

The solution was boiled to remove CO2, following which the excess HClO4 was back-titrated with 10.12ml of dilute NaOH. In a separate experiment, it was established that 27.43 ml of HClO4 neutralized the NaOH in a 25ml portion. Calculate the molari..

  Explain what is the final pressure of ammonia

Pressure is gradually decreased from 87.7mL to 42.6mL. What is the final pressure of ammonia if there is no change in pressure?

  Explain how much corn syrup and how much water

How much corn syrup and how much water would you need to combine to create 500 ml of 10% corn syrup solution? Explain

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd