GENERAL CHEMISTRY
EXPERIMENT-1
DENSITY OF LIQUIDS
PREPARED BY BURAK COBAN
PURPOSE:
In this experiment we will learn how can we find the density of liquids and liquids of density how change effect of temperature, pressure, mass, volume and concentration. For this reason we will take NaCI solutions with different concentrations and we will measure their densities, so we will find out the effects of concentration on density of solutions.
THEORY:
Density is a physical property obtained by dividing the mass of a material or object by its volume (i.e., mass per unit volume). Here is an old riddle:” What weighs more, a ton of bricks or a ton of feathers?” if you answer that they weigh the same, you demonstrate a clear understanding of the meaning of mass- a measure of quantity of matter. Anyone who answers that the bricks weigh more than the feathers has confused the concepts of mass and density. Matter in a bricks is more concentrated than in a feather – that is, the matter in brick is confined to a smaller volume. Bricks are denser than feathers. Density is the ratio of mass to volume.
Density= Mass (m) / Volume (V)
|Density of matter | d | g/ml |
|Mass of matter | m | g |
|Volume of matter | V | ml |
The SI base unit of mass and volume are kilograms and cubic meters, respectively, but chemists generally express mass in grams and volume in cubic centimetres or millilitres. The most commonly encountered density unit, then, is grams per cubic centimetre (g/cm3), or the identical grams per millilitre (g/ml).
The mass of 1.000 L of water at 4 0C is 1.000 kg. The density of water at 40C is 1000g/1000 ml=1.000 g/ml. At 20 0 C, the density of water is 0.9982 g/ml. Density is a function of temperature because volume
References: ( | (0,9972-0,9948)| / 0,9972 ) *100 = 0,24 % d = m / V d = 41,052 / 41,2 = 0,9964 Percent Error : ( | 0,9955 –0,9964| / 0,9955) *100 = 0,09 % 3.