1. Therefore: volume = mass / Density = (5.0 g) / (1.06 g/mL)
QUESTION:
Glacial acetic acid is a liquid with a density of 1.06 g/mL. If an experiment calls for 5.0 g of acetic acid, what volume of glacial acetic acid do we need?
A mL, B mL C mL, D mL
Density is defined as the ratio of mass to volume: Density = mass / volume
Therefore: volume = mass / Density
= (5.0 g) / (1.06 g/mL)
= mL  4.7 mL
Glacial acetic acid is a liquid with a density of 1.06 g/mL. If an experiment calls for 5.0 g of acetic acid, what volume of glacial acetic acid do we need?
A mL, B mL C mL, D mL
PAUSE
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Density is defined as the ratio of mass to volume.
Therefore, to calculate density, we simply divide the mass by the volume.
If we know the mass and density of a sample, we can calculate its volume by simply rearranging this equation.
CLICK Volume equals
HIGHLIGHT in yellow “mass” by the density
HIGHLIGHT in green “density”
The question gives us a mass of 5.0 grams
HIGHLIGHT in yellow “5.0 g”
and a density of 1.06 grams per milliliter
HIGHLIGHT In green “1.06 g/mL”
which is equal to milliliters.
Note that the gram units cancel out.
SHOW CANCELLATION OF UNITS.
THere are 2 significant digits in 5.0 grams, and 3 significant digits in 1.06 g/mL CALLOUT
The less precise term, 5.0 g has only 3 significant digits. Therefore, we express our answer to only 2 significant digits.
We round off our answer to 4.7 mL
The correct answer is A.
This is a typical calculation you will encounter in the laboratory when dealing with corrosive liquids. It is not advisable to weigh
corrosive liquids because they can ruin a balance, which is very expensive, if you happen to spill them.
CLICK PAUSE END RECORDING

2. Video ID: 1A-8-1 © 2008, Project VALUE (Video Assessment Library for Undergraduate Education), Department of Physical Sciences Nicholls State University Author: Glenn V. Lo Narrator: Funded by Louisiana Board of Regents Contract No. LA-DL-SELECT-13-07/08