Question

1. The absorbance of a solution at 590 nm is 3.5. What color will the solution have to

your eyes? What must you do before you can accurately determine its

absorbance? (5 points)

2. Solid ATP is very hygroscopic – that is, the powder picks up water from the air.

With time, the powder will no longer be pure ATP – how would this affect your

accuracy if you were trying to make an exact concentration of ATP using only a

balance - would your solution be too concentrated or too dilute? What could do in

order to

accurately

determine the concentration of the ATP solution? (10 points)

3. You made a green solution by mixing a blue and a yellow dye – is this the only way

to get a green solution? Name an example of a single naturally occurring

molecule with the same absorption characteristics. (5 points)

Answer 1