FE 106
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
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The densities of the NaCI solutions were calculated.
And then a sample of NaCI solution, which we didn’t know its concentration, was added to the empty graduated cylinder.
Mass of the unknown solution (U1) was found.
Finally Density of the unknown solution was calculated.
RESULTS (DATA):
a) Density of water;
Temperature of water: 24 0C
Mass of graduated cylinder (m1 ) : 29,95 g
Volume of water: 20 ml.
Mass of water + graduated cylinder: 49,90 g
Mass of water: 19,95g
Density= (19,95)/ 20= 0,9975 g/ml
Formula of Percent Error:
| T.V. - E.V.| _____________ *(100) |T.V.|
T.V.= Theoretical value.
E.V.= Experimental value.
Percent Error: ( |0,9964- 0,9975| / 0,9964)*100= 0,11%
b) Density of solutions:
Volume of solution: 20 ml
4% concentration =((50,91-29,95)/ 20)= 1,048 g/ml
8% concentration =((51,18-29,95)/20)= 1,0615 g/ml
12% concentration =((51,47-29,95)/20)= 1,076 g/ml
16% concentration =((51,95-29,95)/20)= 1,10 g/ml
Unknown concentration (U1):
U1 ((50,60-29,95)/20)= 1,0325 g/ml
DISCUSSION:
In this Experiment, We were learned how can we find the density of the liquids, by using the formula. But we found different results some of them. For example
because each of the objects displaced the water by 1 mL, their mass over that mL is their density.
Density is the amount of matter per unit of measurement (Merriam-Webster. Merriam-Webster, n.d. Web. 26 Aug. 2016.). If water has a density of 1.0 g/mL and you place a substance with a density of 1.8 g/mL the substance will sink because it is denser than water. Density is often measured in g/cm^3 or g/mL because the formula for density is D=m/v.
Density was an important part of this lab. Density can be defined as the ratio of the mass of an object to the volume. To find the density of an object, simply divide mass and volume. The equation looks like this: D=M/V. Density is an intensive property that depends only on the composition of a substance, not the size of the sample.
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2. In order to calculate the density of a solid or liquid sample, what measurements are needed?
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