Exp. 1.1 Densities of Liquids and Solids

Exp. 1.1 Densities of Liquids and Solids - Densities of...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Densities of Liquids and Solids Purpose The purpose of this experiment was to design and perform an experiment that would measure the densities of both an unknown solid and liquid. The densities of both the solid and liquid must be measured with precision and accuracy. Experimental Procedure Measuring density of unknown solid (all measurements have been collected on a table) 1. Electronic balance was zeroed 2. The mass of the unknown object was then measured
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
3. Graduated cylinder was filled with water to either 20.0 11.0 or 12.0 mL. The meniscus of the water must lay right above the 20.0 11.0 or 12.0 mL line. 4. The solid was then dropped slowly into the cylinder by slightly tilting the cylinder so not to splash and unsettle the water. 5. The volume of the water was then measured once again. 6. The difference between the measurement taken before the solid was introduced was subtracted from the measurement taken after the solid was placed into the water 7. Steps 1 - 6 were then repeated 3 times 8. The average mass and volume was then calculated by adding the 4 measurements and then dividing that sum by 4 9. The density of the averages was then calculated by dividing the mass by the volume 10. The density of the unknown solid was then compared to those on page 3 in the Lab Manual provided for Chem 2070 11. Percent error was ten calculated: (|Your Result - Accepted Value| / Accepted Value) x 100 Measuring density of unknown liquid (all measurements have been collected on a table) 1. Electronic balance was zeroed 2. The mass of the graduated cylinder was measured 3. The cylinder was then filled with the unknown liquid using a 10 mL volumetric pipette 4. The mass of the liquid and cylinder were then measured 5. The difference between the measurement taken before the liquid was dispensed into the cylinder was subtracted from the measurement taken after the liquid was dispensed into the cylinder 6. Steps 1- 6 were then repeated 3 times 7. The average mass and volume was then calculated by adding the 4 measurements and then dividing that sum by 4 8. The density of the averages was then calculated by dividing the mass by the volume 9. The density of the unknown liquid was then compared to those on page 3 in the Lab Manual provided for Chem 2070 10. Percent error was ten calculated: (|Your Result - Accepted Value| / Accepted Value) x 100 Data Unknown Solid Vol. Water (mL) Mass Solid (g) Vol. Water & Solid (mL) Displace- ment (mL) 1. 20.0 7.822 21.1 1.1 2. 20.0 7.822 21.1 1.1
Background image of page 2
3. 11.0
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/05/2009 for the course CHEM 2070 taught by Professor Chirik,p during the Fall '05 term at Cornell University (Engineering School).

Page1 / 5

Exp. 1.1 Densities of Liquids and Solids - Densities of...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online