問題一覧
1
which of the following affects the boiling point and melting point of a solution at the same temperature
the percentage composition of the solution
2
which of the following mixtures can be separated using filtration
sand and water
3
At the ________, the vapor pressure becomes equal to the pressure just above the surface of the liquid pan and bubbles
boiling point
4
A mixture of sodium chloride and solid carbon dioxide can be separated by
sublimation
5
A beaker containing an ethanol solution should never be heated using an
bunsen burner
6
which of the following is an ion?
an atom and molecule carrying a charge
7
which of the following techniques is used to separate black ink into components
chronography
8
what is a saturated solution?
a solution in which the maximum amount of solute is dissolved in a fixed amount of a solvent at a certain temperature
9
which of the following is true about fractioning columns?
it is a long vertical tube containing obstacles and cooled only by air
10
what is a volatile substance?
a liquid that readily evaporates at room temperature
11
Selectively solubility
sand and sugar mixture
12
At the same temperature, the ______ of molecules in the solid, liquid and gaseous phases of a substance is the same
average kinetic energy
13
what is the state of elements located on the right-hand side of the periodic table?
gas
14
Which of the following best defines the vapor pressure of a liquid?
the pressure exerted by a vapor in equilibrium with its liquid at a given temperature in a closed system
15
a _____ is a homogeneous mixture
solution
16
which of the following is a solution
ethanol and water
17
a solution in which the solvent is water is called a ______ solution
aqueous
18
which of the following can be separated by distillation
pure water from sea water, water from sugar-water solution
19
2.00 L of 1.0 M NaCl solution is prepared in a flask. 400.0 mL of the solution is poured out of the flask into a beaker. what is the concentration of the salt solution in the beaker?
1.0 M
20
copper sulfate can be separated from it's solution by
crystallization
21
a mixture of water and ethanol can be separated by
fractional distillation
22
which of the following mixture is separated by a separatory funnel?
oil and water