Explain when extracting caffeine from coffee

Assignment Help Chemistry

Reference no: EM13538977

When extracting caffeine from coffee, is it better to do two extractions with 10 mL of methylene chloride or one extraction with 20 mL of methylene chloride? Why?

Reference no: EM13538977

Questions Cloud

What is the resistance of the wire : The magnetic flux that passes through one turn of a 12-turn coil of wire changes to 4.0 from 9.0 Wb in a time of 0.050 s. The average induced current in the coil is 230 A. What is the resistance of the wire?

Find the distance the car moves before coming to a stop : A 1000kg car moving 40m/s skids to a stop. During the skid, the only force is the frictional force between the tires and the road, which is 6000N. find the distance the car moves before coming to a stop

Research the body of knowledge requirements for the cissp : Go to the (ISC) 2Web site (www.isc2.org). Research the body of knowledge requirements for the CISSP and the SSCP. Which required areas are not covered in this text

Evaluate the net external torque that acts on each wheel : Two wheels have the same mass and radius of 4.1 kg and 0.38 m, respectively. Find the net external torque that acts on each wheel

Explain when extracting caffeine from coffee : When extracting caffeine from coffee, is it better to do two extractions with 10 mL of methylene chloride or one extraction with 20 mL of methylene chloride. Why.

Compute what is the resistance of the coil : A water heater consisting of a metal coil that is connected across the terminals of a 21.0-V power supply is able to heat 160. What is the resistance of the coil

Determine the tension in the crossbar of the ladder : The drawing shows an A-shaped ladder. Both sides of the ladder are equal in length. Determine the tension in the crossbar of the ladder

Explain how long does it take ddt in the soil sample : A biochemist studying the break down of insecticide DDT finds that it decomposes by a first-order reaction w/ a half-life of 12 years. How long does it take DDT in the soil sample to decompose from 2.40 x10^2ppbm to 10. ppbm (parts per billion by ..

Determine what must the baseballs speed be : A pitcher claims he can throw a 0.160-kg baseball with as much momentum as a 2.50-g bullet moving with a speed of 1.50 103 m/s

User Account

All Pages