We appreciate your visit to A 25 0 mL sample containing Cu² gave an instrument signal of 23 6 units corrected for a blank When exactly 0 500 mL of. This page offers clear insights and highlights the essential aspects of the topic. Our goal is to provide a helpful and engaging learning experience. Explore the content and find the answers you need!
Answer :
Final answer:
To find the molar concentration of Cu²+ in the original solution, we calculate the moles added from the standard, find the proportionality constant (k), and use it to determine the moles of Cu²+ present in the 25.0 mL sample. Then, we divide the moles of Cu²+ by the sample volume in liters to find the concentration.
Explanation:
To calculate the molar concentration of Cu²+ in the original 25.0 mL sample, we use the direct proportionality of the signal to the concentration of the analyte.
- Original signal for Cu²+ in the 25.0 mL sample: 23.6 units
- Signal after adding 0.500 mL of 0.0287 M Cu(NO₃)2: 37.9 units
The increase in signal corresponds to the amount of Cu²+ added from the 0.500 mL of 0.0287 M Cu(NO₃)2 solution. First, calculate the moles of Cu²+ added:
Moles of Cu²+ added = Volume * Concentration = 0.500 mL * 0.0287 M = 1.435e-5 mol
Convert the volume from mL to L by dividing by 1000 (0.500 mL = 0.0005 L).
The proportionality factor (k) can be determined using the increase in signal (37.9 - 23.6 = 14.3 units) and the moles of Cu²+ added.
k = ΔSignal / Moles added = 14.3 units / 1.435e-5 mol
Using the proportionality factor, calculate the moles of Cu²+ in the original 25.0 mL sample:
Moles of Cu²+ in original sample = Original signal / k
Finally, obtain the molar concentration of Cu²+ by dividing the moles of Cu²+ by the original volume (in liters).
Concentration of Cu²+ = Moles of Cu²+ / 0.025 L
Thanks for taking the time to read A 25 0 mL sample containing Cu² gave an instrument signal of 23 6 units corrected for a blank When exactly 0 500 mL of. We hope the insights shared have been valuable and enhanced your understanding of the topic. Don�t hesitate to browse our website for more informative and engaging content!
- Why do Businesses Exist Why does Starbucks Exist What Service does Starbucks Provide Really what is their product.
- The pattern of numbers below is an arithmetic sequence tex 14 24 34 44 54 ldots tex Which statement describes the recursive function used to..
- Morgan felt the need to streamline Edison Electric What changes did Morgan make.
Rewritten by : Barada
