Chemistry Different types of solution
a primary substance that cannot be divided into separate substances
element
A chemical reaction occurs when a solution is formed.
false
Colloidal particles will eventually settle out.
false
Colloids are true solutions.
false
CuSO 4 is an example of a chemical element. TrueFalse
false
The components of a true solution blend to form new properties. True, False
false
The most abundant gas in the atmosphere is oxygen. TrueFalse
false
When substances are formed that are different from the starting substances, a physical change has occurred. True False
flase
A mixture in which the particles eventually settle out is called a:
suspension
symbol for copper
Cu
Classify each item by matching as a compound (C) or element (E). Cu: Choose... C E HCl: Choose... E C CCl 4 : Choose... C E Co: Choose... E C HI: Choose... E C CH 4 : Choose... E C
E,C,C,E,C,C
The particles of a suspension are dissolved into the solvent.
False
symbol for iron
Fe
symbol for hydrogen
H
Classify each item by matching as organic (O) or inorganic (I). table salt (NaCl): Choose... O ?I? TNT (C 7 H 5 N 3 O 9 ): Choose... I ?O? glucose (C 6 H 12 O 6 ): Choose... O ?I? 2, 4-D (C 3 H 6 O 3 Cl 2 ): Choose... I ?O? limestone (CaCO₃): Choose... O ?I? water (H₂O):O? I?
I,O,O,O,I,I
symbol for sulfur
S
The components of a mixture maintain their original properties.
True
A colloid can be detected by using the _____ effect.
Tyndall
The scattering of light by a colloidal suspension is called the (Choose... colloidal scattering, aggregate reflection, solute effect, Tyndall effect ).
Tyndall effect
Dust in the atmosphere represents:
a suspension
smallest unit retaining properties of element
atom
Which of the following items represents a chemical change? burning melting evaporation freezing
burning
Fog is an example of a (Choose... suspension, solution, colloid ).
colloid
any chemical combination of elements
compound
Classify each of the following mixtures as homogeneous or heterogeneous: a mixture of oil and water:Choose... homogeneous, heterogeneous air:Choose... heterogeneous homogeneous cereal in milk:Choose... homogeneous heterogeneous a glass of tea:Choose... heterogeneous homogeneous
he,ho,he,ho
A mixture of uneven distribution and easy separation is called:
heterogeneous
A mixture of uneven distribution and easy separation is:
heterogeneous
The two main classes of mixtures are (Choose... colloids, suspensions, homogeneous) and (Choose... solvents, solutions, heterogeneous).
homogeneous, heterogeneous
NaCl is an example of an
inorganic compound
Choose the properties that are characteristic of true solutions. Select as many as apply. light beam passes through invisibly particles are larger than 10 -8cm particles are dissolved particles are suspended indefinitely
light beam passes through invisibly particles are dissolved
An aerosol is a colloidal (Choose... liquid ,solid, gas) suspended in a (Choose... liquid, solid, gas) .
liquid, gas
a physical combination of two or more pure substances
mixture
Can colloidal suspensions be separated out by filtration?
no
C 6 H 6 is an example of an
organic compound
The disturbance of a supersaturated solution will cause:
precipitation
A solution which contains maximum solute at a given temperature is (Choose... saturated, supersaturated, unsaturated) .
saturated
The substance which is dissolved in a solution is called a:
solute
The substance that does the dissolving in a solution is called the(Choose... solute, dissolver, solvent .)
solvent
The substance which dissolves the particles of a solution is called the Choose... solute dissolver solvent .
solvent
Which of the following examples represents a physical change? sugar dissolves in coffee gasoline burns in an engine iron rusts a candle burns
sugar dissolves in coffee
A change that occurs when a solid melts or a liquid freezes is an example of a phase change. true or false
true
The temperature at which a substance boils is an example of a physical property. true or false
true
f more solute can be dissolved in a solvent, the solution is Choose... unsaturated supersaturated saturated .
unsaterated
