WorksheetsChemistry Test Review 23/24
Total questions: 42
Worksheet time: 23mins
What are 2 ways that rate of dissolution can be increased?
Place the beaker on a hot plate
Increase the rate at which the solution is stirred
Add an ice cube to the solution
Decrease the rate at which the solution is stirred
A chemical formula is displayed below:
C2H3O2NH4
How many atoms, in total, are in this chemical formula?
(a)
Which 2 of the following represents a single atom?
N
O2
2K
NH3
Br
Tearing paper is a:
Physical Change
Chemical Change
Painting a fence is a:
Physical Change
Chemical Change
Chewing food is a:
Physical Change
Chemical Change
During digestion, your food turns into another substance. This is a:
Physical Change
Chemical Change
Toasted bread is a:
Physical Change
Chemical Change
Sugar dissolving in water is a:
Physical Change
Chemical Change
Popping fireworks is a:
Physical Change
Chemical Change
Melted ice is a:
Physical Change
Chemical Change
Burning a candle is a:
Physical Change
Chemical Change
Melting ice is a:
Physical Change
Chemical Change
A rotting banana is a:
Physical Change
Chemical Change
An iron bolt rusting is a:
Physical Change
Chemical Change
A diluted solution has _______ solute compared to the solvent.
more
less
Which of the following is NOT a factor that affects the rate of dissolution?
stirring
surface area
temperature
pressure
The removal of a solvent increases the ________ of the solute in the solution.
concentration
dilution
agitation
pressure
___________ is when additional water is added after a solute has been dissolved in an aqueous solution.
concentration
dilution
agitation
surface area
A student adds a certain amount of salt to her cup of water. What would help the salt dissolve more quickly?
Add more water to the mixture
Place her cup in the refrigerator
Gently swirl the mixture in the cup
Place a lid on the top of the cup
A homogeneous mixture in which the most abundant (largest) component is water best describes a(n):
aqueous solution
solvent
dissolution
solute
Evan put a lot of salt in his water. He agitated it for a while and the salt dissolved. He left this solution alone all night and when he checked on it the next morning the water had evaporated and there was salt at the bottom of the cup. This is an example of a:
physical change
chemical change
Which of the following is a compound?
None of these are compounds
2 or more elements combined together is a:
compound
element
mixture
solution
A _______ change takes place when two or more substances combine and form a NEW substance.
physical
chemical
solution
drastic
A _______ change takes place when two or more substances combine NO NEW substance is formed
physical
chemical
solution
drastic
Which 2 observations show evidence of a chemical change?
The color of a substance is blue
Bubbles formed from combining two substances
The mass of combined substances increased
The volume of combined substances increased
After mixing 2 substances, the temperature of the solution decreased
What element is Na?
Nitrogen
Phosphorus
Sodium
Silicon
What element is P?
Nitrogen
Phosphorus
Sodium
Silicon
What element is Si?
Nitrogen
Phosphorus
Sodium
Silicon
Co
Compound
Element
3O2
Compound
Element
H2
Compound
Element
CO2
Compound
Element
C6H12O6
Compound
Element
NaCl
Compound
Element
CO
Compound
Element
A(n) __________ is a pure substance that is made of only one type of matter.
Compound
Element
A(n) __________ is made of more than one type of element / matter.
Compound
Element
How many elements are in the formula for HClO3?
(a)
How many total atoms are in the formula for HClO3?
(a)
A _______ is dissolved in a solution.
Solute
mixture
solvent
chemical change
