To prepare a standard solution of Cu²+ you obtain a piece of copper from a spool of wire. The spool's initial weight is 74.2991 g and its final weight is 73.3216 g. You place the sample of wire in a 500-mL volumetric flask, dissolve it in 10 mL of HNO3, and dilute to volume. Next, you pipet a 1 mL portion to a 250-mL volumetric flask and dilute to volume. What is the final concentration of Cu2+ in mg/L, and its uncertainty? Assume that the uncertainty in the balance is ± 0.1 mg and that you are using Class A glassware.
To prepare a standard solution of Cu²+ you obtain a piece of copper from a spool of wire. The spool's initial weight is 74.2991 g and its final weight is 73.3216 g. You place the sample of wire in a 500-mL volumetric flask, dissolve it in 10 mL of HNO3, and dilute to volume. Next, you pipet a 1 mL portion to a 250-mL volumetric flask and dilute to volume. What is the final concentration of Cu2+ in mg/L, and its uncertainty? Assume that the uncertainty in the balance is ± 0.1 mg and that you are using Class A glassware.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:To prepare a standard solution of Cu²+ you obtain a piece of copper from a
spool of wire. The spool's initial weight is 74.2991 g and its final weight is
73.3216 g. You place the sample of wire in a 500-mL volumetric flask,
dissolve it in 10 mL of HNO3, and dilute to volume. Next, you pipet a 1 mL
portion to a 250-mL volumetric flask and dilute to volume. What is the final
concentration of Cu²+ in mg/L, and its uncertainty? Assume that the
uncertainty in the balance is ± 0.1 mg and that you are using Class A
glassware.
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