I need help on questions 1-4? LAB 5 PRELAB QUESTIONSQualitative AnalysisInstructions: Complete the following questions and hand in at the start of your lab period or wheninstructed by your instructor. Show your work with units and correct significant figures for all questionsthat involve a calculation. Circle your numerical answers.1) A lab technician makes three successive 5.0 mL-to-50.0 mL dilutions (like was described in yourlab procedure) of a 0.970 M stock solution of copper(II) chloride, then adds 3.00 mL to a test tubeinitially containing 7.00 mL of an ammonia solution. Draw a simple diagram showing all dilutions(starting with the 0.970 M stock solution). What is the molarity of copper(II) ions in the test tube?2) A calibration curve was prepared for the measurement of the concentration of the complex ionFeSCN2+. Find the slope, y-intercept, and correlation coefficient (R2) of the linear least-squaresline (best-fit line), and write them in the spaces provided. You are required to use Excel to dothis! Attach a printed copy of this plot, including a title, labeled axes, the equation of the best-fitline, and the R² value included on the plot. There are printers in the Library, you can log in withyour Canvas login.Known [FeSCN²+] A12340.0000300 0.1430.0000600 0.2900.0000900 0.4310.0001200 0.572Slope:y-intercept:R²3) Data isn't perfect! What would you expect the y-intercept to be in the previous question?4) Relying on the calibration curve of question 2, find the concentration of FeSCN²+ in an unknownsample with an absorbance of 0.210. Use the whole best-fit line! While data isn't always perfect,it is still the actual data!

To solve the question-1, we have to understand the successive dilution that are employed here----…

1) A lab technician makes three successive 5.0 mL-to-50.0 mL dilutions (like was described in your lab procedure) of a 0.970 M stock solution of copper(II) chloride, then adds 3.00 mL to a test tube initially containing 7.00 mL of an ammonia solution. Draw a simple diagram showing all dilutions (starting with the 0.970 M stock solution). What is the molarity of copper(II) ions in the test tube?

1) A lab technician makes three successive 5.0 mL-to-50.0 mL dilutions (like was described in your lab procedure) of a 0.970 M stock solution of copper(II) chloride, then adds 3.00 mL to a test tube initially containing 7.00 mL of an ammonia solution. Draw a simple diagram showing all dilutions (starting with the 0.970 M stock solution). What is the molarity of copper(II) ions in the test tube?

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter11: Solutions

Section: Chapter Questions

Problem 10P

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