9) Cr³+ reacts slowly with EDTA (Y4-) so it is usually analyzed using back-titration. A 100.0 mL treated water sample containing only Cr³+ was diluted to 1 L and 25.0 mL 0.005 M Y4- was added to a 10 mL aliquot of the diluted sample. The excess Y4- required 23.0 mL 0.005 M CaCl2 to reach the EBT end-point. Find the ppm Cr³+ in the water sample. a.) 5.2 ppm b.) 52 ppm c.) 520 ppm d.) 5200 ppm
9) Cr³+ reacts slowly with EDTA (Y4-) so it is usually analyzed using back-titration. A 100.0 mL treated water sample containing only Cr³+ was diluted to 1 L and 25.0 mL 0.005 M Y4- was added to a 10 mL aliquot of the diluted sample. The excess Y4- required 23.0 mL 0.005 M CaCl2 to reach the EBT end-point. Find the ppm Cr³+ in the water sample. a.) 5.2 ppm b.) 52 ppm c.) 520 ppm d.) 5200 ppm
Chapter12: Spectrochemical Methods
Section: Chapter Questions
Problem 15P
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C is the answer. Show solution and explanation COMPLETELY,
![9) Cr³+ reacts slowly with EDTA (Y4) so it is usually
analyzed using back-titration. A 100.0 mL treated
water sample containing only Cr³+ was diluted to 1 L
and 25.0 mL 0.005 M Y4 was added to a 10 mL
aliquot of the diluted sample. The excess Y4-
required 23.0 mL 0.005 M CaCl2 to reach the EBT
end-point. Find the ppm Cr³+ in the water sample.
a.) 5.2 ppm
b.) 52 ppm
c.) 520 ppm
d.) 5200 ppm](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F08696192-3a7c-4038-80f8-77daf59dd278%2F325d62c3-0645-49e1-a5c0-46739c2b9a71%2Fhx96629_processed.jpeg&w=3840&q=75)
Transcribed Image Text:9) Cr³+ reacts slowly with EDTA (Y4) so it is usually
analyzed using back-titration. A 100.0 mL treated
water sample containing only Cr³+ was diluted to 1 L
and 25.0 mL 0.005 M Y4 was added to a 10 mL
aliquot of the diluted sample. The excess Y4-
required 23.0 mL 0.005 M CaCl2 to reach the EBT
end-point. Find the ppm Cr³+ in the water sample.
a.) 5.2 ppm
b.) 52 ppm
c.) 520 ppm
d.) 5200 ppm
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