Density Lab Report

Introduction: Density is defined by its mass per unit volume, and is most often written in mathematical terms as; d = m / v Mass is usually given in grams, g, and volume is given in cubic centimeters, g/cm3, or, grams per milliliter, g/mL. Density is not a property that depends upon the amount of substance present. For example, one gram of lead and one ton of lead have the same density. Density also does depend on temperature. For instance cold water is denser than warm water; ice is less dense than both. The method used for determining the density of a substance depends on the nature of the substance. In this lab the densities of unknown irregularly shaped solids and liquids was determined. Accuracy and precision of the results will be estimated, and attention will be paid to the correct use of the significant figures. The experiment approach that will be used will tell the mass and volume of the metal and liquid determined by measuring these two quantities with a graduated cylinder and biuret.
Procedure:
a) The density of metals First I obtained a quantity of unknown metal. Recording the unknown number. I used only one type of metal for this part of the experiment. The unknown metal that I was instructed to use was a chunk, therefore, I used a 50ml graduated cylinder. When using the 50ml cylinder, I filled it with water to approximately the 35ml mark. Then recorded the exact volume of water that was added. I placed the cylinder and water on the balance and recorded the mass to every 0.1g. I added the metal to the graduated cylinder until the water level increased by approximately 2.0ml. Being sure to tap the sides of the cylinder to release any air bubbles. I then recorded the volume of the water plus metal to the nearest 0.1mL. Then recorded the total mass of the cylinder, water and metal. I added more pieces of metal to the cylinder until the water level had increased by 2.5ml. Then I recorded the