Measuring Using A Graduated Cylinder

INTRODUCTION

Some Types of measurements include length, volume, mass and temperature. Length is the measurement or extent of something from end to end. Volume is the amount of space that a substance or object occupies, or that is enclosed within a container. Mass, is the quantity of matter that a body contains, as measured by its acceleration under a given force or by the force exerted on it by a gravitational force. Temperature, is the degree or intensity of a het present in a substance or object, especially according to a comparative scale and shown by a thermometer or perceived by touch. These types of observations are called, quantitative observations. Quantitative observations are measurements that can be assigned a numerical value.

To

Be sure and estimate the last decimal place.

Record your data in both centimeters and millimeters. How many Millimeters are equal to 1 centimeter.

Using a Graduated Cylinder

Obtain a 10 mL and 100 mL graduated cylinder.

Inspect the graduations on the cylinders. Write down in your notebook the interval between each mark. Make a drawing clearly indicating the markings so you won't forget later.

Using a dropping pipet, or a wash bottle, add about 8-9 mL of tap water to the 10 mL graduated cylinder.

Record the volume to the nearest 0.01 mL and write it on your data sheet.

Pour the water in the small graduated cylinder into a larger one (100mL if available)

Record the volume to the last possible digit. Make a drawing to remind you of the ticks on the cylinder and volume each represents.

Using a Balance

Put about 8-9 mL in your small graduated cylinder.

Read and record your volume to the proper number of decimal places.

Weigh a clean and dry small beaker to the nearest 0.01 g or whatever value is possible. Record its mass in grams.

Pour the contents of the graduated cylinder into the beaker.

Weigh the beaker and water. Record the mass.

Subtract the two measurements to get the mass of

DISCUSSION

The difference in volume from the 10 mL cylinder to the 100 mL cylinder was 1.4 mL. They have different volumes because when the water was poured from the 10 mL cylinder to the 100 mL cylinder, water was lost and did not transfer from the 10 mL cylinder. This caused error. The 10 mL cylinder has 3 significant figures when reported, whereas, the 100 mL cylinder has 2 significant figures.

The mass of the water in the graduated cylinder was 7.92 grams, this was found by subtracting the mass of the water and beaker from the mass of the beaker. The density of the water is .93727811.

The temperature of the water was calculated to 22 ℃. The actual actual density of water that was published in the handbook was 0.997770. Therefore, in this experiment there was 6.08% error.

CONCLUSION

This experiment teaches how to make measurements using scientific instruments and learning how to use other measurements calculated together to get a specific measurement. Some things learned in this experiment were:

All measurements must be very specific, otherwise the calculations could be off. There was 6.08% percent error in this experiment according to the data that was