Chemistry-Lab

Chem 1151L – Spring 2021 Measurements Worksheet

Name ___________________________________ MEASURING LENGTH Watch the following Youtube Video and provide answers to all measurements in Question #1. https://www.youtube.com/watch?v=YNfWIGTRVi4

Please note: If the link above does not work, copy the entire link and paste it directly into a web browser.

1. MEASURING LENGTH: Record the length for each of the bars below. The unit for each ruler below is centimeters (cm). If an object being measured is directly on the line of the subdivision, remember that a zero must be used to indicate your estimated digit.

Smallest subdivision in cm: 0.1 cm (tenths)

LENGTH in cm:

Smallest subdivision in cm:

LENGTH in cm:

Smallest subdivision in cm:

LENGTH in cm:

Smallest subdivision in cm:

LENGTH in cm:

MEASURING VOLUME OF A LIQUID

Watch the following videos in Labflow that are found under Lab 2 Chemistry and Measurements and provide answers to all measurements in Question #2 and Question #3.

Video – Using and Reading a Burette

Video – Using Common Glassware

Video – Using Volumetric Glassware and Pipettes

The links to the videos in Labflow look like this:

2. MEASURING VOLUME of a LIQUID: Record the volume of liquid in each of the graduated cylinders below. Remember to first DETERMINE what each subdivision represents (for example, 0.1 mL, 1mL, 10mL,…):

What is the value of each subdivision?

What is the volume?

What is the value of each subdivision?

What is the volume?

What is the value of each subdivision?

What is the volume?

What is the value of each subdivision?

What is the volume?

3. MEASURING VOLUME of a LIQUID: Record the volume of liquid in each of the four burets below. Record your volume measurement directly below the image. The units for each is mL.

4. More practice with online animations a. Reading a buret: Click on the link below: https://www.chem21labs.com/demo/Reading_Buret_Tutorial.cfm Please note: If the link above does not work, copy the entire link and paste it directly into a web browser. Under “Reading a Buret”, you will see a buret to the left, a blow up of the buret is given in the middle to make it easier to take a measurement, and five numbers are given on the right. Click on each number and record your measurements below:

1. 2. 3. 4. 5.

b. Reading a graduated cylinder. Watch the video provided in this link: https://www.wisc-online.com/learn/natural- science/chemistry/gch302/measuring-volume-using-a-graduated-cylinder Please note: If the link above does not work, copy the entire link and paste it directly into a web browser. There are four practice problems at the end of the video. Record your answers here:

1.

2.

3.

4.