Section: 1 – 16 Date Performed: July 10, 2013

Group No.: 4 Date Submitted: July 17, 2013

Experiment #1: Measurements

INTRODUCTION

Density is a physical property of matter, as each element and compound has a unique density associated with it. The unit of Density is g/cm3 or g/mL. It is used to measure thr relative “heaviness” of objects with a constant volume. As defined, the formula for Density is Mass over Volume (ρ=m/v) and it can be rearranged to get the Volume (v=m/ρ) or Mass (m=ρv) of a certain substance. The objectives of this experiment are as follows:

To learn the proper techniques in measuring weight and volume.

To determine the densities of some solids and liquids.

To apply the rules of significant figures when reporting the weight, volume, and density of each material.

To apply our knowledge about the Water Displacement method to determine the Volume of an irregular solid.

The procedure in getting the Volume of a regular solid is different from an irregular solid. We use the Water Displacement method to get the Volume of an irregular solid whereas in a regular solid, we only multiply the length, width, and thickness of the solid.

Percentage Error is the absolute value of the difference of the Theoretical value and Experimental value all over the Theoretical Value multiplied to 100. It is used to compare the results obtained to the known or accepted value.

METHODOLOGY

I. Materials 50-mL graduated cylinder

125-mL flask

Electronic balance

Block of wood

Watch glass

25 centavos coin

Tongs

10.00 mL pipet

Pipet bulb

Metric ruler

Distilled water

Liquid sample (Ethyl acetate) II. Procedure

A. Density of Water

1. Weigh a clean dry graduated cylinder.

2. Add exactly 20 mL Distilled Water in the graduated cylinder.

3. Weigh the graduated cylinder with Distilled water.

4. Make sure that all the data are recorded. Subtract the mass of the