Friday

August 22, 2014

August 22, 2014

Posted by **bme1** on Monday, May 17, 2010 at 9:14pm.

- chemistry -
**GK**, Monday, May 17, 2010 at 9:44pmThe answer is "yes" but I am not sure what formula you are referring to.

Are you expected to use the absorbance v. time graph to get the half-life? If so,

•Select a point on the graph with a high value for absorbance, A. Read the time in minutes, T1.

•On the absorbance axis, find the point corresponding to half of the value above. Use the graph to find the time for the new absorbance value, T2.

• Half-life, T(half) = T2-T1

If you repeat this process with another pair of points, you should get the same half life. I assume you are dealing with a first order reaction, and the absorbance is proportional to the concentration of a reactant that keeps decreasing.

**Related Questions**

math, psychology, puzzle - you have a 5 minute hourglass and a 9 minute hour ...

algebra - could someone explain to me how to do this problem i dont even know ...

Chemistry - Help! If I have 0.0031 absorbance/sec, how would I convert this to ...

physics - If the physical half-life of sulfur-35 is 87.1 days, and the biologic...

Algebra II - Word Problem - A convenience store clerk can wait on 6 customers ...

Algebra II - Word Problem - A convenience store clerk can wait on 6 customers ...

physics? - The minute hand of a bedside clock is 2.5 cm long. In order for the ...

Chemistry Help - If a graph is given for a cuvette using a 1.00 cm , predict the...

maths - A monkey ascends a greased pole 30 m. high. He ascends 3 m. in Ist ...

maths - A monkey ascends a greased pole 30 m. high. He ascends 3 m. in Ist ...