a is not true.
b is not true.
You are correct that c is true.
d? For water aspirators, I don't think a valve is used but I never took one apart to look at the insides. The water IS reduced in the rubber hose. Perhaps Bob Pursley knows. I'll ask him to comment and post.
e is true.
Which of the following statements are true regarding suction filtration? (select all that apply)
a) Product should always be rinsed with cold water
b) The filter flask can be held in place with your hand
c) When filtering is complete you should remove the suction hose and then turn the water off
d) When the water is turned on it passes through a one-way valve, reducing the pressure in the rubber hose
e) Before filtering you should always wet your filter paper with the same solvent used in the recrystallization
I know c) is true. Not sure about the others.
3 answers
The sentence on D should read, "The water pressure IS reduced in the rubber hose." I ommitted the word pressure.
I would list D as not true, generally. Water traps are often used between the Buchnell Filter and the vacumn source, but I have never seen valves inserted.
1 answer