IDEAL GAS LAW LAB EXAM
QUESTIONS AND ANSWERS. VERIFIED
2026/2027.
How many milliliters of CONCENTRATED hydrochloric acid should be placed in the eudiometer
tube?
Exactly 20 mL because the lab write-up says so.
18-23 mL because the HCl is in excess so it does not need to be an exact amount.
We are not using CONCENTRATED hydrochloric acid; it is just regular acid. - ANS 18-23 mL
because the HCl is in excess so it does not need to be an exact amount.
The mass of the magnesium metal when performing the calculation of the ideal gas constant
experiment...
Needs to be as close to 0.046g as possible.
Must be less than or equal to 0.046 g.
1 @2026 COPY ALLRIGHTS RESERVED.
, Can be any amount greater than 0.046 g. - ANS less than or equal to 0.046 g
The purpose of the experiment is to
Experimentally determine the ideal gas constant R.
Use the ideal gas constant to calculate the volume of hydrogen gas produced.
Experimentally determine the volume of water vapor inside the eudiometer tube
Use R to determine the molar mass of magnesium. - ANS experimentally determine ideal gas
constant R
You invert the eudiometer into (choose more than one answer)
a beaker with enough water to ensure that the stoppered portion of the eudiometer is in liquid.
an empty beaker.
a beaker with enough concentrated HCl to ensure that the stoppered portion of the
eudiometer is in liquid.
a beaker large enough to fit your hand in it as well as your finger remains over the stopper.
a beaker full of water. - ANS a beaker with enough water to ensure that the stoppered
portion of the eudiometer is in liquid.
a beaker large enough to fit your hand in it as well as your finger remains over the stopper.
When calculating the ideal gas constant, R, what are the common mistakes that are made?
(More than one answer are possible.)
2 @2026 COPY ALLRIGHTS RESERVED.
QUESTIONS AND ANSWERS. VERIFIED
2026/2027.
How many milliliters of CONCENTRATED hydrochloric acid should be placed in the eudiometer
tube?
Exactly 20 mL because the lab write-up says so.
18-23 mL because the HCl is in excess so it does not need to be an exact amount.
We are not using CONCENTRATED hydrochloric acid; it is just regular acid. - ANS 18-23 mL
because the HCl is in excess so it does not need to be an exact amount.
The mass of the magnesium metal when performing the calculation of the ideal gas constant
experiment...
Needs to be as close to 0.046g as possible.
Must be less than or equal to 0.046 g.
1 @2026 COPY ALLRIGHTS RESERVED.
, Can be any amount greater than 0.046 g. - ANS less than or equal to 0.046 g
The purpose of the experiment is to
Experimentally determine the ideal gas constant R.
Use the ideal gas constant to calculate the volume of hydrogen gas produced.
Experimentally determine the volume of water vapor inside the eudiometer tube
Use R to determine the molar mass of magnesium. - ANS experimentally determine ideal gas
constant R
You invert the eudiometer into (choose more than one answer)
a beaker with enough water to ensure that the stoppered portion of the eudiometer is in liquid.
an empty beaker.
a beaker with enough concentrated HCl to ensure that the stoppered portion of the
eudiometer is in liquid.
a beaker large enough to fit your hand in it as well as your finger remains over the stopper.
a beaker full of water. - ANS a beaker with enough water to ensure that the stoppered
portion of the eudiometer is in liquid.
a beaker large enough to fit your hand in it as well as your finger remains over the stopper.
When calculating the ideal gas constant, R, what are the common mistakes that are made?
(More than one answer are possible.)
2 @2026 COPY ALLRIGHTS RESERVED.
