Stuck on some Biology work. Help!

Question

1. A 2 mg.ml-1 stock standard solution (in saline) of the coloured protein haemoglobin is provided. Prepare a range of different concentrations of haemoglobin solution using the volumes of stock solution and saline indicated in the table below. Calculate the final concentrations of haemoglobin in each tube and enter these values into the table.

Volume of stock standard

haemoglobin solution (ml)

Tube 1 - 0.0

Tube 2 - 0.3

Tube 3 - 0.6

Tube 4 - 0.9

Tube 5 - 1.2

Tube 6 - 1.5

Tube 7 - 1.8

Tube 8 - 2.1

Tube 9 - 2.4

Tube 10 - 2.7

Tube 11 - 3.0

Volume of Saline (ml)

1 - 3.0

2 - 2.7

3 - 2.4

4 - 2.1

5 - 1.8

6 - 1.5

7 - 1.2

8 - 0.9

9 - 0.6

10 -0.3

11 - 0

Final Concentration of Haemoglobin (mg.ml-1)

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Answer 1

Haemoglobin (mg.ml-1).

Tube 1 - 0.0

Tube 2 - 0.2

Tube 3 - 0.4

Tube 4 - 0.6

Tube 5 - 0.8

Tube 6 - 1.0

Tube 7 - 1.2

Tube 8 - 1.4

Tube 9 - 1.6

Tube 10 - 1.8

Tube 11 - 2.0