Finals Exam: Gas Lab Test Flashcards
Which gas makes up 20% of our air
Oxygen
Which has filled the Hindenburg blimp
Hydrogen
Which gas is insoluble in water
Hydrogen
Which gas can be used as a fuel?
Hydrogen
Which gas is most soluble in water?
Carbon dioxide
Which gas turns limewater milky?
Carbon dioxide
Which gas makes a glowing splint relight?
Oxygen
Which gas doesn’t burn or support burning?
CO2
Which gas is colorless, odorless, and tasteless
Carbon dioxide, hydrogen, and oxygen
Which gas/gases made the burning splint go out?
Oxygen and carbon dioxide
Which gas can be used as a fire extinguisher?
Carbon dioxide
Which gas is less dense than air and water?
Hydrogen
Which gas is denser than air and water
None, because if any of them were denser than air, the experiment wouldn’t work
Which acid turned blue litmus paper pink in the gas labs?
Hydrochloride acid
What is the formula for marble chips?
CaCO3
What is a dark gray powder that does not get used up in the chemical reaction?
Manganese Oxide/ MnO2
What combines with zinc metal to release hydrogen gas
Hydrochloric acid
What naturally breaks down to form water and oxygen
H2O2
What is the catalyst in the preparation of oxygen?
MnO2/Manganese Oxide
The word invert means?
To turn upside down
The arrow in a chemical equation means?
Yields or produces
Chemical equations must be balanced bc?
- Matter cannot be created or destroyed
- We have to start with the same number of atoms we end with
- The term equation means that there are equal number on both sides of the reaction
The combination of Zn + HCL is used to produce?
Hydrogen
Ca(OH)2 is the formula for?
Calcium hydroxide ( limewater )
How can we prove that there is carbon dioxide in our breath?
Breathe into limewater
It is important to set up all connections tightly in the experiment because?
- Gas could leak for the gas generating bottle
- Gas will not travel to the trough
What proves that all 3 of the gases are less dense than water
The bubbles that moved up the test tube as we collected the gas
What supports the fact that carbon dioxide is soluble in water?
It is in soda
What wasn’t part of the lab procedure for the gas lab unit?
Testing the gases with pH paper
