Need help with Pre Lab, Synthesis of alum PLEASE HELP
Cesium Chromium alum was synthesized according to the procedure in SUSB-030. The following table shows the reagents used in the synthesis.
Value Units Weight of Chromium 1.48 g Concentration of Cesium Hydroxide 1.18 mol/L Volume of Cesium Hydroxide 20.7 mL Concentration of Sulfuric Acid 9.36 mol/L Volume of Sulfuric Acid 10.44 m
Question 1
What is the molar mass of Cesium Chromium Alum? (use the atomic masses in the table at the back of the lab manual. Give the result to 3 significant figures.)
Enter Your Answer: 474 Incorrect
Question 2
How many mmol of Chromium were used in the synthesis?
Enter Your Answer: .028 Incorrect
Question 3
How many mmol of Cesium hydroxide were used in the synthesis?
Enter Your Answer: 1.18 Incorrect
Question 4
How many mmol of sulfuric acid were used in the synthesis?
Enter Your Answer: 9.36 Incorrect
Question 5
What was the limiting reagent?
A. Chromium B. Cesium Hydroxide C. Sulfuric Acid D. Water
E. The mmol of Chromium and Cesium Hydroxide are equal, so either of them is limiting
Enter Your Answer: A B C D E F E Incorrect
Question 6
How many mmols of water are consumed in making the product?
Enter Your Answer:
Question 7
What is the theoretical yield of alum in grams?
Enter Your Answer: 110 Incorrect
After reaction, the solution is evaporated to reduce its volume.
The final volume is 27.4 mL. The solution is cooled in an ice bath.
6.23 g of alum is recovered by filtration.
Question 8
What is the percent yield?
Enter Your Answer: 5.7% Incorrect
Question 9
The solubility of the alum at 0 oC is 24.2 g/L. How many grams of alum is left in solution after evaporation?
Enter Your Answer:
Question 10
What percent of the actual yield does the alum in solution represent?
Enter Your Answer: .2 Incorrect
Need help with Pre Lab, Synthesis of alum PLEASE HELP
Cesium Chromium alum was synthesized according to the procedure in SUSB-030. The following table shows the reagents used in the synthesis.
Value | Units | |
Weight of Chromium | 1.48 | g |
Concentration of Cesium Hydroxide | 1.18 | mol/L |
Volume of Cesium Hydroxide | 20.7 | mL |
Concentration of Sulfuric Acid | 9.36 | mol/L |
Volume of Sulfuric Acid | 10.44 | m |
Question 1
What is the molar mass of Cesium Chromium Alum? (use the atomic masses in the table at the back of the lab manual. Give the result to 3 significant figures.)
Enter Your Answer: 474 Incorrect
Question 2
How many mmol of Chromium were used in the synthesis?
Enter Your Answer: .028 Incorrect
Question 3
How many mmol of Cesium hydroxide were used in the synthesis?
Enter Your Answer: 1.18 Incorrect
Question 4
How many mmol of sulfuric acid were used in the synthesis?
Enter Your Answer: 9.36 Incorrect
Question 5
What was the limiting reagent?
A. Chromium B. Cesium Hydroxide C. Sulfuric Acid D. Water
E. The mmol of Chromium and Cesium Hydroxide are equal, so either of them is limiting
Enter Your Answer: A B C D E F E Incorrect
Question 6
How many mmols of water are consumed in making the product?
Enter Your Answer:
Question 7
What is the theoretical yield of alum in grams?
Enter Your Answer: 110 Incorrect
After reaction, the solution is evaporated to reduce its volume. The final volume is 27.4 mL. The solution is cooled in an ice bath. 6.23 g of alum is recovered by filtration. |
Question 8
What is the percent yield?
Enter Your Answer: 5.7% Incorrect
Question 9
The solubility of the alum at 0 oC is 24.2 g/L. How many grams of alum is left in solution after evaporation?
Enter Your Answer:
Question 10
What percent of the actual yield does the alum in solution represent?
Enter Your Answer: .2 Incorrect