Question

Colorimetry Pre-Lab Questions Sec Name _______________________ 1. Consider the glassware found in the lab drawers at JCCC. What glassware (be specific on the size) do you intend to use to hold (contain) the five solutions you will prepare? Explain why you chose this glassware: What glassware (be specific on the size) will you use to measure the volumes of the stock CuSO4(aq) and the water? Explain why you chose this glassware: 2. Complete the table below and show a sample calculation for the volumes needed to prepare solution 2. Note: the total volume of each solution will be 10.0 mL and the stock solution has a CuSO4 concentration of 0.40 M. Solution [CuSO4] volume of 0.40 M CuSO4 volume of H2O 1 0.080 M 2 0.16 M 3 0.24 M 4 0.32 M 5 0.40 M Sample calculation for solution 2 (including units): 3. Graph the following data (x-axis = concentration, y-axis = absorbance). Label the axes, title the graph and staple it to this page. Concentration (M) 0.000 0.020 0.040 0.060 0.080 0.100 Absorbance 0.000 0.165 0.329 0.484 0.688 0.873 Note: You may use graph paper to plot the data by hand or you may use computer software to make your graph.

          Colorimetry
Pre-Lab Questions
Sec ____
Name ___________________________________________________
1. Consider the glassware found in the lab drawers at JCCC.
What glassware (be specific on the size) do you intend to use to hold (contain) the five solutions you
will prepare? ________________________
Explain why you chose this glassware:

What glassware (be specific on the size) will you use to measure the volumes of the stock
CuSO4(aq) and the water? ________________________
Explain why you chose this glassware:

2. Complete the table below and show a sample calculation for the volumes needed to prepare
solution 2. Note: the total volume of each solution will be 10.0 mL and the stock solution has a
CuSO4 concentration of 0.40 M.

Solution [CuSO4] volume of 0.40 M CuSO4 volume of H2O
1 0.080 M
2 0.16 M
3 0.24 M
4 0.32 M
5 0.40 M

Sample calculation for solution 2 (including units):

3. Graph the following data (x-axis = concentration, y-axis = absorbance). Label the axes, title the
graph and staple it to this page.

Concentration (M) 0.000 0.020 0.040 0.060 0.080 0.100
Absorbance 0.000 0.165 0.329 0.484 0.688 0.873

Note: You may use graph paper to plot the data by hand or you may use computer software to
make your graph.

Colorimetry
Pre-Lab Questions
Sec
Name
1. Consider the glassware found in the lab drawers at JCCC.
What glassware (be specific on the size) do you intend to use to hold (contain) the five solutions you
will prepare?
Explain why you chose this glassware:

What glassware (be specific on the size) will you use to measure the volumes of the stock
CuSO4(aq) and the water?
Explain why you chose this glassware:

2. Complete the table below and show a sample calculation for the volumes needed to prepare
solution 2. Note: the total volume of each solution will be 10.0 mL and the stock solution has a
CuSO4 concentration of 0.40 M.

Solution [CuSO4] volume of 0.40 M CuSO4 volume of H2O
1 0.080 M
2 0.16 M
3 0.24 M
4 0.32 M
5 0.40 M

Sample calculation for solution 2 (including units):

3. Graph the following data (x-axis = concentration, y-axis = absorbance). Label the axes, title the
graph and staple it to this page.

Concentration (M) 0.000 0.020 0.040 0.060 0.080 0.100
Absorbance 0.000 0.165 0.329 0.484 0.688 0.873

Note: You may use graph paper to plot the data by hand or you may use computer software to
make your graph.

Added by Jason Z.

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