Question

In: Chemistry

How many microliters of a 904.0 ppm Co2 stock solution are required to prepare 19.00 mL...

How many microliters of a 904.0 ppm Co2 stock solution are required to prepare 19.00 mL of a 24.0 ng/μL Co2 solution?

Solutions

Expert Solution

Ans. Desired [CO2] = 24.0 ng/ uL                                       ; [1 ng = 10-6 mg ; 1 uL = 10-6 L]

                                    = (24.0 x 10-6 mg) / (10-6 L)

                                    = 24.0 mg/ L                                     ; [1 ppm = 1 mg/ L]

                                    = 24.0 ppm

# So far we have-

            Desired solution = 24.0 ng/ uL = 24.0 ppm

            Stock solution = 904.0 ppm

Now, using-

            C1V1 (stock solution) = (C2V2) desired solution

            Or, 904.0 ppm x V1 = 24.0 ppm x 19.00 mL

            Or, V1 = (24.0 ppm x 19.00 mL) / 904.0 ppm = 0.50442 mL

            Hence, V1 = 0.50422 mL

So, required volume of stock solution = 0.50422 mL                            ; [1 mL = 1000 uL]

                                                            = 504.22 uL


Related Solutions

How many microliters of a 872.0 ppm Co2 stock solution are required to prepare 19.00 mL...
How many microliters of a 872.0 ppm Co2 stock solution are required to prepare 19.00 mL of a 13.0 ng/μL Co2 solution? W/ Correct Sig Figs
Start with a 1040.0 ppm Stock Zn solution. Prepare control 1 by diluting 2.00 mL of...
Start with a 1040.0 ppm Stock Zn solution. Prepare control 1 by diluting 2.00 mL of Stock Zn solution in a 200.0 mL volumetric flask and dilute to the mark. Prepare control 2 by diluting 2.00 mL of control 1 into a 100.0 mL volumetric flask. What is the Zn concentration (ppm Zn) in control 2?
1. How many grams of NaCl are required to prepare 500. ml of 1.20M NaCl solution?...
1. How many grams of NaCl are required to prepare 500. ml of 1.20M NaCl solution? 2. ) Write the balanced equation for the reaction that occurs when sulfuric acid, H2SO4 is titrated with the base, sodium hydroxide, NaOH. Sodium sulfate, Na2SO4 is the salt produced. 3. SO2 gas is in a 2.0L flask at STP (0 o C, 1 atm). A. Using the Ideal Gas Law, determine the concentration of the gas in moles/L B. Calculate the density of...
You want to prepare 450.0 mL of a 145 ppm K+ ion solution. The density of...
You want to prepare 450.0 mL of a 145 ppm K+ ion solution. The density of the solution is 1.01 g/mL. You have at your disposal a solution that is 0.728 M in K2SO4. How many mL of the K2SO4 solution do you need to use?
A solution consists of 35 ppm of benzene. The density of the solution is 1.00g/mL. How...
A solution consists of 35 ppm of benzene. The density of the solution is 1.00g/mL. How many grams of benzene are in 1 g of solution? How many grams of benzene are in 1.0 L of the solution? What is the mass percentage of benzene in the solution? Please show calculations!
How many grams of NaOH are needed to prepare 600.0 mL of a solution with pH...
How many grams of NaOH are needed to prepare 600.0 mL of a solution with pH = 10.00 at 25 °C?
How many ml of 0.100M NaOH solution are required to neutralize 15.0 ml of 0.200M H3PO4?
How many ml of 0.100M NaOH solution are required to neutralize 15.0 ml of 0.200M H3PO4?
How many 2 g tablets are needed to prepare 100 mL of a​ 10% solution?
How many 2 g tablets are needed to prepare 100 mL of a​ 10% solution?
Prepare 2000 mL of solution at 9% saline. How many grams of sodium chloride will be...
Prepare 2000 mL of solution at 9% saline. How many grams of sodium chloride will be needed?
Calculate the mass of CaCO3 required to prepare 500 mL of a standard solution that is...
Calculate the mass of CaCO3 required to prepare 500 mL of a standard solution that is 100 ppm in Ca2+. (Include units and use an appropriate number of sig figs.) Calculate the mass of NaCl required to prepare 500 mL of a standard solution that is 100 ppm in Na+. (Include units and use an appropriate number of sig figs.)
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT