Acids And Bases Lab Report
Acids & Bases: Reactions, Standardizations, & Titrations Experiments 21 & 22
Experimental Overview:
The procedure for this experiment was carried out as instructed in the laboratory manual, Experiments in General Chemistry, 4th ed., S.L. Murov, Experiment 21, Acids and Bases: Reactions and Standardizations, and Experiment 22, Acids and Bases: Analysis. There were modifications made by the instructor to dilute the 6M NaOH to 0.1M in 300mls instead of 500mls in Part B of Experiment 21.
One objective for performing these two experiments was to observe qualitatively the reactions between common acids, bases, and the indicators phenolphthalein, methyl orange, bromothymol blue, and red cabbage extract. Another focus of this experiment was to perform a …show more content…
Color Chart of Indicators in 0.01M HCl, pH 7 Buffer, and 0.01 M NaOH
0.01M HCl pH 7 Buffer 0.01 NaOH
Phenolphthalein
(clear) Cloudy precipitate No change Pink
Methyl orange
(yellow-orange) Reddish pink No change Yellow
Bromothymol blue
(green) No change No change Blue
Red-cabbage extract (purple) Pink No change Green
Table 3 includes data collected throughout the process of standardizing the sodium hydroxide solution. Information from all three titrations of sodium hydroxide into KHP is recorded in order to calculate the average molarity of the NaOH solution in the end. Calculations used to derive the numbers in the table will be shown after the table.
Table 3. Data collected from three titrations of 0.1M NaOH into 50mls KHP with 3 drops of phenolpthalein.
Trial 1 Trial 2 Trial 3 Average
Mass of KHP 1.001g 1.002g 1.001g
Moles of KHP 0.00490mols .00491mols .00490mols
Initial Buret Reading 30.0mL 30.0mL 30.0mL
Final Buret Reading 9.8 mL 10.0mL 10.0mL
Volume of NaOH Solution 20.2mL 20.0mL 20.0,L
Molarity of NaOH solution 0.243M 0.246M 0.243M 0.2439M
Deviation From average 0.0009 0.0016 0.0009
Experimental Overview:
The procedure for this experiment was carried out as instructed in the laboratory manual, Experiments in General Chemistry, 4th ed., S.L. Murov, Experiment 21, Acids and Bases: Reactions and Standardizations, and Experiment 22, Acids and Bases: Analysis. There were modifications made by the instructor to dilute the 6M NaOH to 0.1M in 300mls instead of 500mls in Part B of Experiment 21.
One objective for performing these two experiments was to observe qualitatively the reactions between common acids, bases, and the indicators phenolphthalein, methyl orange, bromothymol blue, and red cabbage extract. Another focus of this experiment was to perform a …show more content…
Color Chart of Indicators in 0.01M HCl, pH 7 Buffer, and 0.01 M NaOH
0.01M HCl pH 7 Buffer 0.01 NaOH
Phenolphthalein
(clear) Cloudy precipitate No change Pink
Methyl orange
(yellow-orange) Reddish pink No change Yellow
Bromothymol blue
(green) No change No change Blue
Red-cabbage extract (purple) Pink No change Green
Table 3 includes data collected throughout the process of standardizing the sodium hydroxide solution. Information from all three titrations of sodium hydroxide into KHP is recorded in order to calculate the average molarity of the NaOH solution in the end. Calculations used to derive the numbers in the table will be shown after the table.
Table 3. Data collected from three titrations of 0.1M NaOH into 50mls KHP with 3 drops of phenolpthalein.
Trial 1 Trial 2 Trial 3 Average
Mass of KHP 1.001g 1.002g 1.001g
Moles of KHP 0.00490mols .00491mols .00490mols
Initial Buret Reading 30.0mL 30.0mL 30.0mL
Final Buret Reading 9.8 mL 10.0mL 10.0mL
Volume of NaOH Solution 20.2mL 20.0mL 20.0,L
Molarity of NaOH solution 0.243M 0.246M 0.243M 0.2439M
Deviation From average 0.0009 0.0016 0.0009