1. A 1.2-gram sample of lanolin was treated with Wij’s solution and excess potassium iodide solution. The liberated iodine reacted with 30 ml of 0.1 N sodium thiosulfate solution. If the iodine value was determined as 12.69, what is the volume used in blank titration?
Atomic weights are not provided, but please use rounded-off values to the nearest whole number.
(examples: 24.305, use "24"; 107.8682, use "108"; 1.00784, use "1"; 15.999, use "16")
Add trailing zeros to complete your answer to the 3rd decimal place, if necessary.
(examples: if your answer is "62.7", write it as 62.700;
if your answer is "37.12", write it as 37.120
if your answer is "123", write it as 123.000)
1. A 1.2-gram sample of lanolin was treated with Wij’s solution and excess potassium iodide solution. The liberated iodine reacted with 30 ml of 0.1 N sodium thiosulfate solution. If the iodine value was determined as 12.69, what is the volume used in blank titration?
2. An analyst accurately weighed 5.351 grams of sample for ash-insoluble content using the dry method. The weight of the crucible containing the ash was 40.722 grams. If the sample was said to have 2.150% of insoluble ash, what is the weight of the tared crucible?
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