Question

based on this datas how can I find the concentration of cu2+ of each standard,however I used 1.000mg/ml standard solution of cu2+

how to find the concentration of each standard solution based on the data...the concentration of cu is 1mg/ml

DATA Volume of Standard Cur Solution Added to Flasks #5 #4 #3 #2 #1 Final Volume 3 initial Volume Volume Used Volume of H-O Added to Flasks #4 #3 #2 om 5.om 34 m ug.lom Final Volume Initial Volume ocom m 5.som Volume Used Volume of Nith Added to Flasks #5 #2 #3 #4 #1 Flask Final Volume 210-S Absorbance Readings | | Standard #3 | Standard #4 Standard #2 Standard #1 0.312 o, 418 0.1-5 | 0704 nce CALCULATIONS: Concentration of Cu2- in standard solutions (in molL) nitial Volume Volume of H20 Added to Flasks #5 #4 #3 lask #2 #1 inal Volume nitial Volume Volume Used Volume of NH3 Added to Flasks #5 #4 #3 #1 #2 Flask Final Volume nitial Volume -pom olume Used 1 50. hl 50 oom] | | 9.90ml 1000m 0.00 m otal Volume in Flask DIAMET THICKNEss MEASUREMENT #1

Answer 1

Hey!

First you need to take your 1mg/mL standard solution and vary its concentration. Take absorbance reading at each concentration.

If you've done this part of experiment, then the rest is easy!

Plot calibration curve: Absorbance at y-axis and concentrations of standard solution at x-axis.

You'll get a straight line plot.

Now, find concentrations of unknown #1 to #5 solutions using that calibration curve(by marking values of concentrations for corresponding absorbance values).

Cheers!