1. The following data were obtained after the moisture and total ash content determination of acacia powder: Wt. of cmpty crucible 52.452 g Wt. of crucible & sample 61.648 g Wt. of crucible & sample after drying to constant wt. 60.502 g Wt. of crucible and residue left after incineration 53.006g • Moisture content in grams • Total ash content in grams • Percent total ash 2. Find the acid numher of a rosin sample weighing 1.100g which required 28.00 ml. of 0.1100 N NAOH to hring the endpoint. 3. Find the SV of cottonseed oil if a 1.532 g of sample, refluxed with 25 mL of about 0.5 Nalcoholic KOH, required 15.70 ml. of 0.5100 N HCI for the residual titration. The blank was run using the same volume of 0.5 N alcoholic KOH and required 26.00 ml. of 0.5100 N HCI to bring about the endpoint 4. If a sample of white wax is found to have an ester value of 65.7 and a saponification value of 74. What is the acid value of the sample? 5. Determine the iodine value of an unknown sample of oil weighing 0.21g if 26 mL and 12 ml of 0.1100 N of Na Thiosulfate are required for the blank and residual titration respectively. 6. Find the acid valuc of a sample weighing 1.230 g that consumes 30.0 ml. of 0.110 N NaOH to bring about the end point using KOH in the titration
1. The following data were obtained after the moisture and total ash content determination of acacia powder: Wt. of cmpty crucible 52.452 g Wt. of crucible & sample 61.648 g Wt. of crucible & sample after drying to constant wt. 60.502 g Wt. of crucible and residue left after incineration 53.006g • Moisture content in grams • Total ash content in grams • Percent total ash 2. Find the acid numher of a rosin sample weighing 1.100g which required 28.00 ml. of 0.1100 N NAOH to hring the endpoint. 3. Find the SV of cottonseed oil if a 1.532 g of sample, refluxed with 25 mL of about 0.5 Nalcoholic KOH, required 15.70 ml. of 0.5100 N HCI for the residual titration. The blank was run using the same volume of 0.5 N alcoholic KOH and required 26.00 ml. of 0.5100 N HCI to bring about the endpoint 4. If a sample of white wax is found to have an ester value of 65.7 and a saponification value of 74. What is the acid value of the sample? 5. Determine the iodine value of an unknown sample of oil weighing 0.21g if 26 mL and 12 ml of 0.1100 N of Na Thiosulfate are required for the blank and residual titration respectively. 6. Find the acid valuc of a sample weighing 1.230 g that consumes 30.0 ml. of 0.110 N NaOH to bring about the end point using KOH in the titration
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:1. The following data were obtained after the moisture and total ash content
determination of acacia powder:
Wt. of empty crucible 52.452 g
Wt. of crucible & sample 61.648 g
Wt. of crucible & sumple after drying to constant wt. 60.502 g
Wt. of crucible and residue left after incineration 53.006g
• Moisture content in grams
• Total ash content in grams
Percent total ash
2. Find the acid numher of a rosin sample weighing 1.100g which required 28.00 ml. of
0.1100 N NaOH to bring the endpoint.
3. Find the SV of cottonseed oil if a 1.532 g of sample, refluxed with 25 mL of about 0.5
N alcoholic KOH, required 15.70 ml of 0.5100 N HCI for the residual titration. The
hlank was run using the same volume of 0.5 N alcoholic KOH and required 26.00 ml
of 0.5100 N HCI to bring about the endpoint
4. If a sample of white wax is found to have an ester value of 65.7 and a saponification
valuc of 74. What is the acid value of the sample?
5. Determine the iodine value of an unknown sample of oil weighing 0.21g if 26 mL and
12 ml. of 0.1100 N of Na Thiosulfate are required for the blank and residual titration
respectively.
6. Find the acid value of a sample weighing 1.230 g that consumes 30.0 mL of 0.110 N
NaOH to bring about the end point using KOH in the titration
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