Lab About Alcohols
Chemistry lab on Alcohols
Cristina Tolosa
Jhony Arias
Data Collection:
Table One: absorbance recorded with the different substances
Try one Try two
Substance Absorbance Substance Absorbance
4ml of water, 0 ml of ethanol 0.0000 4ml of water, 0 ml of ethanol 0.000
3ml of water, 1 ml of ethanol 0.125 3ml of water, 1 ml of ethanol 0.058
2 ml of water, 2ml of ethanol 0.147 2ml of water, 2ml of ethanol 0.087
1ml of water, 3ml of ethanol 0.153 1ml of water, 3 ml of ethanol 0.099
0 ml of water, 4ml of ethanol 0.175 0ml of water, 4ml of ethanol 0.139
Mouthwash without alcohol 0.178 Mouthwash without alcohol 0.503
Blue mouthwash 0.180 Blue mouthwash 0.164
Average Absorbance
0.000
0.092
0.117
0.126
0.157
0.341
0.172
Observations from data collected: Overall through the range of data from 0.000 to 0.180 there was a small range most of the outcomes were the same and consistant, the only outlier of the data was the no alcohol mouthwash which ranged from 0.178 to o.503 showing that either during the lab there was a technical error made or it had a lot of alcohol concentration.
Calculations made in lab:
Concentration of ethanol solution: 96%
Density: 0.78g/ml m/m% = mass of solute * 100/ mass of solution
C1*V1 = C2V2
Convert from percentage to molarity
Find equation
Calibration curve find unkown values
Example of doing this:
Density of solution: mass of solution/volume of solution
Concentration of ethanol: mass of solute/mass of solution *100
Table two: concentrations; the molarities substance Concentration of try one Concentration of try 2 Averga concentration
4 ml of water, 0 ml of ethanol 0.000 0.000 0.000
3ml of water, 1 ml of ethanol 0.830 0.830 0.830
2ml of water, 2ml of ethanol 1.650 1.650 1.650
1ml of water 3ml of ethanol 2.480 2.480 2.480
0ml of water, 4ml of ethanol 3.300 3.300 3.300
Mouthwash without alcohol 3.300 3.300 3.300
Blue mouthwash 3.300 3.300 3.300
Graph #1 Comparing results of try one with try two:
Cristina Tolosa
Jhony Arias
Data Collection:
Table One: absorbance recorded with the different substances
Try one Try two
Substance Absorbance Substance Absorbance
4ml of water, 0 ml of ethanol 0.0000 4ml of water, 0 ml of ethanol 0.000
3ml of water, 1 ml of ethanol 0.125 3ml of water, 1 ml of ethanol 0.058
2 ml of water, 2ml of ethanol 0.147 2ml of water, 2ml of ethanol 0.087
1ml of water, 3ml of ethanol 0.153 1ml of water, 3 ml of ethanol 0.099
0 ml of water, 4ml of ethanol 0.175 0ml of water, 4ml of ethanol 0.139
Mouthwash without alcohol 0.178 Mouthwash without alcohol 0.503
Blue mouthwash 0.180 Blue mouthwash 0.164
Average Absorbance
0.000
0.092
0.117
0.126
0.157
0.341
0.172
Observations from data collected: Overall through the range of data from 0.000 to 0.180 there was a small range most of the outcomes were the same and consistant, the only outlier of the data was the no alcohol mouthwash which ranged from 0.178 to o.503 showing that either during the lab there was a technical error made or it had a lot of alcohol concentration.
Calculations made in lab:
Concentration of ethanol solution: 96%
Density: 0.78g/ml m/m% = mass of solute * 100/ mass of solution
C1*V1 = C2V2
Convert from percentage to molarity
Find equation
Calibration curve find unkown values
Example of doing this:
Density of solution: mass of solution/volume of solution
Concentration of ethanol: mass of solute/mass of solution *100
Table two: concentrations; the molarities substance Concentration of try one Concentration of try 2 Averga concentration
4 ml of water, 0 ml of ethanol 0.000 0.000 0.000
3ml of water, 1 ml of ethanol 0.830 0.830 0.830
2ml of water, 2ml of ethanol 1.650 1.650 1.650
1ml of water 3ml of ethanol 2.480 2.480 2.480
0ml of water, 4ml of ethanol 3.300 3.300 3.300
Mouthwash without alcohol 3.300 3.300 3.300
Blue mouthwash 3.300 3.300 3.300
Graph #1 Comparing results of try one with try two: