Measuring Volume with a Graduated Cylinder

This video tutorial explains how to measure liquid volume using graduated cylinders. It covers the importance of reading the meniscus, calculating subgraduate values, and understanding significant figures. The tutorial provides examples and practice exercises to ensure accurate volume measurement.

What is the meniscus in the context of measuring liquid volume?

• The top surface of the liquid

• The curved surface of the liquid

• The bottom of the graduated cylinder

• The measurement line on the cylinder

Why is the meniscus usually concave in a graduated cylinder?

• Cohesive forces are stronger than adhesive forces

• Adhesive forces between liquid molecules are stronger

• Liquid molecules are more attracted to each other than to glass

• Liquid molecules are more attracted to glass than to each other

What is the correct way to read the volume in a graduated cylinder?

• From above the cylinder

• At eye level with the bottom of the meniscus

• At eye level with the top of the meniscus

• From the side of the cylinder

How do you determine the value of each subgraduate in a 100 mL graduated cylinder with 10 subgraduates between 50 and 60 mL?

• 1 mL

• 2 mL

• 0.5 mL

• 10 mL

What is the value of each mark on a 25 mL graduated cylinder with 10 subgraduates between 10 and 15 mL?

• 0.2 mL

• 2 mL

• 0.5 mL

• 1 mL

In a 10 mL graduated cylinder, what is the value of each subgraduate between the numbers 6 and 8?

• 1 mL

• 0.5 mL

• 0.2 mL

• 2 mL

What are significant figures in a measurement?

• Only the digits that can be accurately measured

• All the certain digits plus one uncertain or estimated digit

• Only the digits that are estimated in a measurement

• Digits that are not important in a measurement

Why do we estimate one decimal place past the smallest scale division?

• Because it is easier to estimate than to measure

• To make the measurement easier to read

• To decrease the accuracy of the measurement

• To increase the accuracy of the measurement

If the volume reading is at the 11 mL marking, how should it be recorded?

• 11.1 mL

• 11.0 mL

• 11 mL

• 10 mL

What is the purpose of practicing reading graduated cylinders in the tutorial?

• To understand the concept of meniscus

• To learn how to estimate better

• To memorize the values of each measuring line

• To check if your volume readings are correct