WorksheetsPreparation for final part 2.3
Total questions: 25
Worksheet time: 13mins
What is the concentration?
It is expressed by the number of equivalents of the substance contained in 1 liter of solvent
It is expressed by the number of equivalents of the substance contained in 1 liter of solution
It is expressed by the number of equivalents of the solvent/solute contained in 1 liter of solution
What kind of characteristic has blue paper filter?
D: 3; charac.: high density, for very fine precipitation
D: 1-2,5; charac.: finely porous, for large precipitation
D: 1-2,5; charac.: finely porous, for fine--grained precipitation
Which of the following does not influence filtration?
Temperature
Density
pH
Through which filter was hot filtration carried out?
Folded filter
Low-pass filter
High-pass filter
What is the hydraulics?
Is the force generated by the pressure which is equal to the product
Is the specific potential energy of the liquid pressure
Is a technology and science using engineering, chemistry and other science involving the mechanical properties
What is the number of modes of solute contained in 1 kg of solvent?
Molal concentration/molality
Molar concentration/molarity
Concentration by mass
What is a piezometric pressure?
Pressure that any fluid in a confined space exerts
Pressure exerted by gas particles
Specific potential energy of the liquid pressure
What are the filter materials which are used in various organic and inorganic substances within the lab?
Fibrous (cotton wool, wool, various fabrics, etc.)
Polypropelene
Zeolite
Where the filter papers are used and for which purpose?
In manufacture to separate oil mixtures
In laboratory experiments to separate fine solid from liquid particles
In factory to obtain heavy substances
What is hydrostatics study?
The movement of a fluid
The equilibrium or state of rest of fluid
Both of them
Find the equation of molality
m=(moles of solute)/(kg of solvent)
m=solute/(solution volume)
N=(grams solute)/(volume solvent in liters*equivalent weight)
The number of moles of solute in molarity contained in …
1 kg
1 L
1 mL
Filter materials can be:
Steel, fiber, porous
Fibrous, high, porous
Fibrous, granular, porous
For what we use Bursen flasks?
For vacuum filtration
To check weight
To take residue
How ready-made paper filters distinguished?
By smelling
By size
By the color of the tape holding the pack together
What should you do before low vacuum filtering?
Thoroughly wash the Bunsen flask and Bachner funnel
Thoroughly wash the filter paper
Both of them
… the hydrodynamic characteristic of a liquid
Molecular viscosity
Turbulent viscosity
Surface tension
By what is molar concentration expressed?
By the temperature
By the number of moles
By the pressure
What is hydraulics study about?
The rest of a liquid
The motion of different liquid
The pressure of a liquid
Choose the correct definition of bunser flask
Is a flat-bottomed conical flask made of thick-walled glass with a tube. Used for vacuum filtration
Kind a flask with a base in the share of a cone and a short neck. Used as a container for chemical substance
It is used to hold and measure accurate amounts of liquid
In which method the number of molecules of solute contained in 1 kg of solvent?
The percentage of concentration by mass
Molarity
Normal concentration
What include in the filtration system?
Cup, funnel, paper filter
Cup, funnel, silicone filter
Cup, paper filter
Filter materials can be:
Steel, fiber, porous
Fibrous, high, porous
granular (quartz sand);
Filter materials can be:
Steel, fiber, porous
Fibrous, high, porous
porous (paper, ceramics, pressed glass).
What is the percentage concentration by mass?
It is expressed by the number of equivalents of the substance contained in 1 liter of solvent
is the ratio of the mass of the solute to the mass of the entire solution multiplied by 100
It is expressed by the number of equivalents of the solvent/solute contained in 1 liter of solution
