WorksheetsBanaketa mekanikoak
Total questions: 14
Worksheet time: 15mins
In a process, mechanical separation:
Can only be applied to heterogeneous mixtures
Can only be applied to homogeneous mixtures or solutions
Can be applied to both homogeneous and heterogeneous mixtures.
Centrifugation is used to separate a mixture of two solids.
True
False
It depends on the size of the solids
We can distinguish the following mixtures through sedimentation processes:
solid
liquids
liquids and solids
An alloy is a...
homogeneous
heterogeneous
It is not an alloy, it is a pure substance.
What is the amount of grams that a filter can accumulate before saturation?
Filtration capacity
Load capacity
Flow rate
List each laboratory material
The material commonly used in a filtration laboratory is:
a) An Erlenmeyer flask and a Buchner funnel with or without filter paper
b) A Kitasato and a Buchner funnel, filter paper, vacuum pump
c) A Kitasato and a filter plate, vacuum pump
b and c
We have two filter plates for sintering. Which plate has a larger pore size, the one with number 0 or the one with number 5?
Number 0
Number 5
Both are the same
Which of the following substances should be avoided when cleaning photographic plates?
Chromic mixture because it permanently closes the pores.
Hot and concentrated alkaline solutions
Concentrated hydrofluoric acid or concentrated phosphoric acid.
All answers are correct
How can colloids be destabilized?
through Brownian motion
by lowering the temperature
through coagulation and flocculation
What is the main force responsible for separating liquids through centrifugation?
force of gravity
centrifugal force
mechanical force
Can an emulsion be broken down by centrifugation?
Yes, because it is a homogeneous mixture
No, because it is a homogeneous mixture
Yes, because it is a heterogeneous mixture
If a protocol indicates that a mixture should be centrifuged at 1000 xG (or RCF) and you only have a centrifuge with a radius of 200 mm in your laboratory, at what speed would you set your centrifuge in "rpm"?
What types of centrifugal rotor are there? Write down which ones you know.
