chemistry
A student was in a hurry and decided to take a shortcut in the Procedure. After washing and drying the crucible with towels, the student did not do steps 2, 3, and 4 in the Procedure, but immediately went to step 5 and continued from there. What is the error that will be introduc into the experiment? 2. If your sample contained a volatile impurity, what value would be in error, the mass of the anhydrous salt or the mass of the water? Explain your answer. 3. Below are the formulas of some hydrates. What is the mole ratio of salt to water? Salt Water Hydrate Na SO4-10H2O Co(NO3)2" 6H20 Mo(NO3)2-5H20 CaSO4-2H2O (CaSO H20 4. A student worked with a sample of ZnSO47H-O. a. How many atoms of each kind are present? b. What is the stoichiometric ratio of salt to water? c Calculate the percent of water in the hydrate. Show your work
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Post-Lab Questions 1. A student was in a hurry and decided to take a shortcut in...
Post-Lab Questions 1. A student was in a hurry and decided to take a shortcut in the Procedure. After washing and drying the crucible with towels, the student did not do steps 2, 3, and 4 in the Procedure, but immediately went to step 5 and continued from there. What is the error that will be introduc into the experiment? 2. If your sample contained a volatile impurity, what value would be in error, the mass of the anhydrous salt...
Salt Water Hydrate Na2SO4·10H20 Co(NO3)2-6H20 Mo(NO3)2-5H20 CaSO4-2H20 (CaSO4)2.H20
Salt Water Hydrate Na2SO4·10H20 Co(NO3)2-6H20 Mo(NO3)2-5H20 CaSO4-2H20 (CaSO4)2.H20
A student is given a sample of a calcium sulfate hydrate. He places the sample in...
A student is given a sample of a calcium sulfate hydrate. He places the sample in a dry, covered crucible and weighs it. The total mass (crucible, cover, and hydrate) is 19.39219.392 g. The crucible and cover together had previously weighed 17.98717.987 g. He then heats the crucible to redness for 10 minutes with the cover slightly ajar. After the crucible cools, he weighs the crucible and its contents; the mass is now 19.09819.098 g, due to the loss of...
4. A student was given a sample of MgSO4.7H20 and asked to determine the % water...
4. A student was given a sample of MgSO4.7H20 and asked to determine the % water of hydration by a procedure similar to the one which you used. The following data were obtained. Using this data complete the table showing the calculations for the % water in the hydrate. Mass of crucible and hydrate (before heating) 28.45 g 25.40 g Mass of beaker Mass of hydrate Mass of beaker and anhydrous salt (after heating) 27.16 g Mass of water lost...
1. The crucible is not fired, as the procedure suggests. The mass of the dirty crucible...
1. The crucible is not fired, as the procedure suggests. The mass of the dirty crucible is recorded. However, the impurities are burned off in the experiment. Will the reported mass of the final product be too high, too low, or unchanged as a result of this technique error? Too high Too low Unaffected 2. If you put more water than is needed for reaction 3, and then did not dry out this excess water, what effect (if any) would...
I need helppp with my AP chem lab
Purpose: To calculate the amount of AgNO3 present in an unknown solution of water through the process of gravimetric analysis with NaCl. Background: Have you ever had difficulty lathering soap or find that the scum in your shower constantly needs to be removed? These are signs of “hard water.” Soap does not lather well in hard water because metal ions, such as Ca2+, form precipitates, creating “soap scum.” A precipitate is an insoluble compound that forms when soluble ions in...
Construct a flow chart describing the seperation of the mixture and the isolation of each compound...
Construct a flow chart describing the seperation of the
mixture and the isolation of each compound in this experiment. (Lab
steps/procedures includes for reference)
4. Construct a flow chart describing the separation of the mixture and the isolation of each compound in this experiment. A commonly used method of separating a mixture of organic compounds is known as liquid-liquid extraction. Most reactions of organic compounds require extraction at some stage of product purification. In this experiment you will use extraction...
Separating a Mixture, Recrystallization, pre-lab assignment could you also explain why you chose that substance for...
Separating a Mixture, Recrystallization, pre-lab
assignment
could you also explain why you chose that substance for the empty
spaces and question marks
EXPERIMENT 4 Pre-Lab Assignment Separating a Mixture, Recrystalliration Name Date 1. Complete the following flowchart which shows how to separate a mixture of sand, sodium chloride and acetanilide. Notice that after a separation process (a down arrow) the filtered solids are shown on the left and the filtrate (the liquid) is shown on the right. The terminal step...
help please? this was the only other information given REPORT SHEET Determination of the Solubility-Product Constant...
help please?
this was the only other information given
REPORT SHEET Determination of the Solubility-Product Constant for a Sparingly Soluble Salt EXPERIMENT 8 A. Preparation of a Calibration Curve Initial (Cro121 0.0024 M Absorbance 5 mL Volume of 0.0024 M K Cro Total volume 1. I mL 100 mL 2. 100ML 3. 10 mL 100ml 4. 15 mL 100 ML Molar extinction coefficient for [CrO2) [Cro,2) 2.4x100M 12x1044 2.4810M 3.6810M 0.04) 2037.37 0.85 1.13 2. 3. Average molar extinction coefficient...
Post-Lab Questions 1. A student was in a hurry and decided to take a shortcut in the Procedure. After washing and drying the crucible with towels, the student did not do steps 2, 3, and 4 in the Procedure, but immediately went to step 5 and continued from there. What is the error that will be introduc into the experiment? 2. If your sample contained a volatile impurity, what value would be in error, the mass of the anhydrous salt...
Salt Water Hydrate Na2SO4·10H20 Co(NO3)2-6H20 Mo(NO3)2-5H20 CaSO4-2H20 (CaSO4)2.H20
4. A student was given a sample of MgSO4.7H20 and asked to determine the % water of hydration by a procedure similar to the one which you used. The following data were obtained. Using this data complete the table showing the calculations for the % water in the hydrate. Mass of crucible and hydrate (before heating) 28.45 g 25.40 g Mass of beaker Mass of hydrate Mass of beaker and anhydrous salt (after heating) 27.16 g Mass of water lost...
Construct a flow chart describing the seperation of the
mixture and the isolation of each compound in this experiment. (Lab
steps/procedures includes for reference)
4. Construct a flow chart describing the separation of the mixture and the isolation of each compound in this experiment. A commonly used method of separating a mixture of organic compounds is known as liquid-liquid extraction. Most reactions of organic compounds require extraction at some stage of product purification. In this experiment you will use extraction...
Separating a Mixture, Recrystallization, pre-lab
assignment
could you also explain why you chose that substance for the empty
spaces and question marks
EXPERIMENT 4 Pre-Lab Assignment Separating a Mixture, Recrystalliration Name Date 1. Complete the following flowchart which shows how to separate a mixture of sand, sodium chloride and acetanilide. Notice that after a separation process (a down arrow) the filtered solids are shown on the left and the filtrate (the liquid) is shown on the right. The terminal step...
help please?
this was the only other information given
REPORT SHEET Determination of the Solubility-Product Constant for a Sparingly Soluble Salt EXPERIMENT 8 A. Preparation of a Calibration Curve Initial (Cro121 0.0024 M Absorbance 5 mL Volume of 0.0024 M K Cro Total volume 1. I mL 100 mL 2. 100ML 3. 10 mL 100ml 4. 15 mL 100 ML Molar extinction coefficient for [CrO2) [Cro,2) 2.4x100M 12x1044 2.4810M 3.6810M 0.04) 2037.37 0.85 1.13 2. 3. Average molar extinction coefficient...
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