Astudent is extracting caffeine from water with dichloromethane. the k value is 4.6. if the student starts with a total of 40 mg of caffeine in 2 ml of water and extracts once with 6 ml of nioromethane, how much caffeine will be in the dichloromethane extract? show all work.

Explanation:

The given value of K = 4.6

As before extraction, 40 mg of caffeine in 2 ml of water.

Hence, after the first extraction,

               4.6 =

                = 7.2 mg

Therefore, caffeine extracted from dichloromethane is as follows.

                     40 mg - 7.2 mg = 32.8 mg

Now, after the second extraction

                 4.6 =

                  = 1.29 mg

So,                (7.2 - 1.29) mg = 5.91 mg

This means that 5.91 mg of caffeine is extracted from dichloromethane.

After the third extraction,

                 4.6 =

                      = 0.229 mg

Hence, caffeine extracted from dichloromethane is as follows.

                             (1.29 - 0.229) mg

                            = 1.061 mg

Therefore, we can calculate the total amount of caffeine extracted as follows.

      Total caffeine extracted = 40 - caffeine remains in dichloromethane after three extraction

                                              = 40 - 0.229

                                              = 39.771 mg

Thus, we can conclude that the total extracted caffeine is 39.771 mg.                                    

plasma is the state of matter where the substance is ionized and has no definite shape or volume. the fact of being ionized makes the substance a good electrical conductor.