Banaketa mekanikoak

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