Chem lab

Objective (1 point):​

Obtain this information from the lab manual

Procedure (2 points):

Obtain this information from the lab manual

Observations (2 points):

Record detailed observations from the video

Data:

Insert data obtained from your TA here

Calculations and questions (15 points):

CHEM 101L Report – Experiment #3

Dilution Series for Standard Solutions

Sol’n #	Volume initial sol’n	Concentration initial sol’n	Volume final sol’n	Concentration final sol’n
Stock	---	---
1
2
3
4

Sample dilution calculation (to prepare solution #3):

Data

Sol’n #	Concentration	Absorbance
1
2
3
4
penny	---

Calibration Curve (attach EXCEL plot)

Use EXCEL to prepare a calibration curve of absorbance vs. concentration for the 4 dilute copper standard solutions. Include a point with x = 0, y = 0. Fit these data with a linear trendline and obtain the equation and R2 (displayed on plot and noted here). Report R2 to four decimal places.

Equation _________________________________ R2__________________________

Determination of Copper in Penny

Please show calculations.

Date of penny_______________________ Mass of penny_______________________

Concentration of Cu(II) in penny solution _______________________

Moles Cu(II) in penny solution _______________________

Mass Cu(II) in penny solution _______________________

Mass % Cu in penny _______________________