Explore BrainMass
Share

# Molar Concentration of Copper (II) Nitrate

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

Please help with the following problem. Provide step by step calculations in this answer.

A 25.00 mL sample containing Cu2+ gave an instrument signal of 23.6 units (corrected for a blank). When exactly 0.500 mL of 0.0287 M Cu(NO3)2 was added to this solution, the signal increased to 37.9 units. Calculate the molar concentration of Cu2+ assuming that the signal was directly proportional to the analyze concentration.

© BrainMass Inc. brainmass.com March 21, 2019, 5:36 pm ad1c9bdddf
https://brainmass.com/chemistry/physical-chemistry/molar-concentration-copper-ii-nitrate-226498

#### Solution Preview

Problem: A 25.00 mL sample containing Cu2+ gave an instrument signal of 23.6 units (corrected for a blank). When exactly 0.500 mL of 0.0287 M Cu(NO3)2 was added to this solution, the signal increased to 37.9 units. Calculate the molar concentration of Cu2+ assuming that the signal was directly proportional to the analyte concentration.

The overall 25.5 mL ...

#### Solution Summary

This solution involves the mixing of two solutions of different volume and concentration. It helps find the resulting concentration and molarity. Step by step calculations are provided in the solution and also in an Excel spreadsheet.

\$2.19