Purchase Solution

Extraction of caffeine from tea

Not what you're looking for?

Ask Custom Question

At 25 degrees C, 1.0 gram of caffeine will dissolve in 47 ml of water, in 8.1 ml's of chloroform, in 86 ml of benzene, or in 370 of diethyl ether. Calculate the partition coefficient of caffeine between water and each of the other three solvents. Which of these three organic solvents would be the best choice for extracting caffeine from an aqueous solution?
Thank you for your time.

Purchase this Solution
Solution Summary

A well explained solution with all steps. The expert examines how to extract caffeine from tea.

Solution Preview

How caffeine distributes between the solvents is based on the solubility of caffeine in each of the three solvents: more of it will be found in the solvent in which it is more soluble. The ratio of the concentrations of caffenie in each of the immiscible solvents is called the distribution coefficient or the partition ...

Purchase this Solution
Free BrainMass Quizzes
General Chemistry - Classification of Matter

This test will assess your knowledge on the classification of matter which includes elements, compounds and mixtures.

Periodic table

Thermochemistry

The quiz helps in revising basic concepts about thermochemistry.

Organic Chemistry Naming: Alkanes

This is a quiz which is designed to assist students with learning the nomenclature used to identify organic compounds. This quiz focuses on the organic compounds called Alkanes.

Match Elements with their Symbols

Elements are provided: choose the matching one- or two-letter symbol for each element.

View More Free Quizzes
Related BrainMass Solutions

  • Extraction of caffeine from tea

    8848 Extracting caffeine from tea Why is sodium chloride added to the tea solution before extracting with ethyl acetate? 4 grams of calcium carbonate was added to 90 ml's of water in a flask, then was boiled and poured over tea bags.

  • Calculating amount of caffeine from absorbance

    579100 Calculating amount of caffeine from absorbance The samples 75mL of coffee (Sample A) and tea (Sample B) were run. Determine the amount of caffeine/mL in a cup of tea or coffee and then the total amount of caffeine in a cup of 200mL.

  • Diuretic Drinks: Helpful or Harmful

    A diuretic is something that promotes the production of urine. Drinks that contain caffeine (tea, coffee, soda) are examples of diuretic drinks.

  • Reverse-Phase HPLC

    Please include sample preparation, extraction and indicate what mobile phase, column, and detector were used. Caffeine along with sweeteners constitutes many beverages we drink today.

  • Migraine vs. headache

    Though coffee comes to mind as the most common source of caffeine, it's also naturally found in tea and chocolate, and it is often added to soft drinks and non-prescription drugs like pain-relievers and cold remedies.

  • Executive Summary of Epidemiology Article

    The researchers mainly concentrated on the use of green tea and black tea in the study. Black tea has distinct polyphenols which are produced in the fermentation process which make it different from green tea.

  • Acid and Alkaline Food Consumption

    High acid foods such as food from animal sugar, caffeine, alcohol and processed foods can have an effect on the mineral supply such as sodium, potassium, magnesium, and calcium.

  • Coffee in Japan

    Starbucks is the largest coffee provider in Japan from the United States. They are slowing the pace of their expansion in Japan. Others are also closing or slowing the number of shops they have.

  • Benefits of Cardio Activity: Muscles, Glucose and protein, an Ideal Pre-Game Meal, Pros/Cons of Ergogenic Aids

    Caffeine: is a stimulant, so stimulates heart function, blood circulation and release of adrenaline. This works to potentiate muscle contraction, raise rate of muscle and liver glycogen breakdown and increase release of FFA from adipose tissue.

View More Related Solutions