Measurements in the Chemistry Lab

Choose all the apparatus that can be used to measure out 50 cm³ of dilute sulfuric acid.

• Beaker with only a 100 cm³ marking

• 100 cm³ measuring cylinder

• Use a 25.0 cm³ pipette twice

• 50.00 cm³ burette

What must be taken into consideration when collecting a gas using the water displacement method?

• The solubility of gas in water.

• The volume of water used.

• Whether gas is odourless or pungent.

• The colour of the gas.

• The number of bubbles produced per second.

Which of the following is part of the process of measuring the volume of a liquid using a burette?

• Fill up the burette using a filler and allow the liquid to flow out into a measuring cylinder.

• Fill the burette with the liquid, and then place it on a mass balance.

• Fill the burette with the liquid and then pour it back into the original container to measure the volume

• Fill the liquid into the burette, note the initial volume, allow the liquid to flow out into a container, and note the final volume.

What are the units commonly used to express volumes of liquids and gases?

• grams (g) and kilograms (kg)

• cubic decimeters (dm³) and cubic centimeters (cm³)

• inches and feet for liquids and gases

• pounds and ounces for gases

What must be considered when collecting a gas using upward and downward delivery methods?

• The relative molecular mass of the gas, and of water.

• It is more difficult to collect colourless gases.

• The relative molecular mass of the gas, and of air.

• The solubility of gas in water.

Which of the following about the use of pipette is correct?

• Using the correct size pipette for the volume needed.

• Using a wet pipette to measure out some acid.

• Blowing out the last drop of liquid trapped at the bottom tip.

• Using any size pipette for any volume

Which of the following is an accurate reading of the burette shown? ___________ cm³

• 0

• 0.00

• 0.2

• 0.20

Which of the following is part of the process of measuring the volume of a liquid using a pipette?

• Fill up the pipette using a filler to the mark and allow the liquid to flow out into a beaker.

• Fill the pipette with the liquid, and then place it on a mass balance.

• Fill the pipette with the liquid and then pour it back into the original container to measure the volume.

• Fill the liquid into the pipette, note the initial volume, allow the liquid to flow out into a beaker, and then note the final volume on the pipette.

What is the process of measuring the total volume of a gas using a gas syringe?

• Collecting the gas in a gas syringe and place it on a mass balance to find its mass.

• Attaching the gas syringe to a gas source, allowing the gas to flow in, and recording the volume when the plunger stops moving.

• Measuring the diameter of the gas syringe and calculating the volume using the formula for cylinder volume.

• Submerging the gas syringe in water and measuring the displacement of water.

What is the principle behind choosing to use burette over other apparatus, to measure the volume of a liquid?

• The liquid fills the burette completely, allowing for accurate volume measurement.

• The burette is calibrated to account for the space occupied by the stopcock.

• The liquid is dispensed drop by drop to ensure precise volume measurement to 0.05 cm³.

• The burette is inverted to measure the volume of the liquid accurately.