If a 38.9 mM copper (II) solution(solution A) had an absorbance of 0.43. What would be the absorbance if 5 mL of solution A was used to prepare a 20.0 mL of a new copper (II) solution.
Write answer to three significant figures.
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If a 38.9 mM copper (II) solution(solution A) had an absorbance of 0.43. What would be...
If a 39 mM phosphate solution(solution A) had an absorbance of 0.539. What would be the absorbance if 8 mL of solution A was used to prepare a 20.0 mL of a new phosphate solution. Write answer to three significant figures.
If a 27.9 mM phosphate solution(solution A) had an absorbance of 0.641. What would be the absorbance if 10 mL of solution A was used to prepare a 20.0 mL of a new phosphate solution. Write answer to three significant figures.
If a 41.4 mM phosphate solution(solution A) had an absorbance of 0.608. What would be the absorbance if 9 mL of solution A was used to prepare a 20.0 mL of a new phosphate solution. Write answer to three significant figures.
If the absorbance of a solution of copper(II) ion decreases by 22.00% upon dilution, what volume of water was added to 20.0 mL of a 1.20 M solution of Cu2+(aq)?
If the absorbance of a solution of copper(II) ion decreases by 21.00% upon dilution, what volume of water was added to 20.0 mL of a 20 M solution of Cu2+(ag)?
1st attempt See Periodic Table If the absorbance of a solution of copper(II)ion decreases by 17.00% upon dilution, what volume of water was added to 20.0 mL of a 1.20 M solution of Cu2+(ag)? mL of water added 04/18 >
The absorbance of an iron thiocyanate solution containing 0.005 mg Fe/mL was reported as 0.43 at 540 nm using a 1.00 cm cuvette. What will be the absorbance if the solution is diluted to twice its original volume and is placed in a 2 cm cuvette? Write answer to three decimal places.
Part C The absorbance of a cationic iron(II) sample solution was measured in a spectrophotometer, but the instrument returned an error because the absorbance was too high. The sample was then diluted by using a pipette to take 100.0 μL of the sample and injecting it into a cuvette already containing 2.00 mL of water (total volume is 2.00 mL + 100.0 μL). The absorbance value of the diluted solution corresponded to a concentration of 6.70×10−6 M . What was...
stock solution of copper(II) A chemist makes 630. mL of copper(II) fluoride (CuF) working solution by adding distilled water to 120. mL of a 3.17 T fluoride in water Calculate the concentration of the chemist's working solution. Be sure your answer has the correct number of significant digits. x s ?
Question 6 A student prepared an unknown sample by making a dilute solution of the unknown sample. The dilute sample was prepared by adding 5.0 mL of the unknown sample to a 25.0 mL flask. What is the concentration(mM) of the diluted unknown sample that has an absorbance of 0.270? Write answer to three significant figures. Using the information and answer in question 6, what is the concentration(mM) of the original unknown sample? Write answer to three significant figures. There...