A student heats a crucible and sample of a hydrate as directed in the procedure, then...
A student heats a crucible and sample of a hydrate as directed in the procedure, then allows the sample to cool in the crucible while sitting out on the lab bench rather than in a desicooler. What will happen to the mass of the contents of the crucible as it cools? Explain why this happens.
Homework Answers
Add Answer to:
A student heats a crucible and sample of a hydrate as directed
in the procedure, then...
A student is given a sample of a manganese(II) chloride hydrate. She weighs the sample in...
A student is given a sample of a manganese(II) chloride hydrate. She weighs the sample in a dry, covered crucible and obtains a mass of 24.747 g for the crucible, cover, and sample. Earlier she had found that the crucible and cover weighed 23.599 g. She then heats the crucible to drive off the water of hydration, keeping the crucible at red heat for about 10 minutes with the cover slightly ajar. She then lets the crucible cool, and finds...
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...
Please provide correct work & answers to the following, thank you!! .A student observed that when heated his...
Please provide correct work & answers to the following, thank
you!!
.A student observed that when heated his sample produced condensation on the upper walls of his test tube and changed color. When the sample was added to water it produce a solution with a color very similar to that of the original salt. Explain these observations 2. A student gets a measurement of 30.112 grams when he weighs a dry empty crucible and cover. He then adds an unknown...
Post lab Questions: 1. While performing the formula of hydrate laboratory experiment, the lid accidently slips...
Post lab Questions: 1. While performing the formula of hydrate laboratory experiment, the lid accidently slips over the crucible to completely seal the crucible. a. What effect this change will cause on your calculated experimental results? Explain. b. Would your calculated percent water of hydration be high, low or unaffected? Explain your answer. 2. A student was asked to identify a sample of unknown hydrate. Student was provided with the following experimental data. 3.51 g sample of the hydrate when...
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...
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...
1. A student who was in a hurry to complete this experiment did not follow the...
1. A student who was in a hurry to complete this experiment did not follow the exact directions for some of the procedural steps. Briefly explain what effect, if any, the following changes would have on the whole number ratio of Mg and O in the compound the student produced. (1) When arriving at the laboratory station, the student found a dirty crucible and cover. In the interest of time, the student skipped steps 2-8, weighed the cruible and cover,...
Name Isis Collier Lab Section REPORT ON EXPERIMENT 3 Introduction to Gravimetrie Analysis Date 1919 Assigned Salt U...
Name Isis Collier Lab Section REPORT ON EXPERIMENT 3 Introduction to Gravimetrie Analysis Date 1919 Assigned Salt USALL CHLORIDEHYDRATE Formula Weight Locle X HD DATA AND RESULTS Trial 1 Trial 43.8119- 43.4019 mass of crucible, cover, and hydrated salt tared-mass mass of hydrated salt 43.8179 mass of crucible, cover, and residue after heating mass of anhydrous salt 0.5219 moles of anhydrous salt 0.00407445/wCelle mass of water lost 0.926 percent by mass of water in hydrate 80.53% moles of water lost...
Experiment 3 Prelaboratory Assignment Empirical Formulas Date Lobo Sec. Name Desk No. 1. Elemental mercury was...
Experiment 3 Prelaboratory Assignment Empirical Formulas Date Lobo Sec. Name Desk No. 1. Elemental mercury was first discovered when a mercury oxide was decomposed with heat, forming mercury metal and oxygen gas. When a 0.204-g sample of the mercury oxide heated. 0.189 g of mercury metal remains. Note: not attempt this experiment in the laboratory because of the release of toxic mercury vapor. a. What is the mole ratio of mercury to oxygen in the sample? b. What is the...
Sample 2 97.79 g 102.95 g 101.15 g Sample 1 (a) Mass of 98.32 g crucible...
Sample 2 97.79 g 102.95 g 101.15 g Sample 1 (a) Mass of 98.32 g crucible + lid (b) Mass of crucible, lid + 103.76 g KCIO3 (c) Mass of crucible, lid + 102.01g residue after 1st heating (d) Mass of crucible, lid + residue after 101.69 g 2nd heating (e) Mass of crucible, lid + 101.68 g residue after 3rd heating 101.05 g 101.01 g Data Analysis .Use your data to determine the experimental mass percent of oxygen in...
A student is given a sample of a manganese(II) chloride hydrate. She weighs the sample in a dry, covered crucible and obtains a mass of 24.747 g for the crucible, cover, and sample. Earlier she had found that the crucible and cover weighed 23.599 g. She then heats the crucible to drive off the water of hydration, keeping the crucible at red heat for about 10 minutes with the cover slightly ajar. She then lets the crucible cool, and finds...
Please provide correct work & answers to the following, thank
you!!
.A student observed that when heated his sample produced condensation on the upper walls of his test tube and changed color. When the sample was added to water it produce a solution with a color very similar to that of the original salt. Explain these observations 2. A student gets a measurement of 30.112 grams when he weighs a dry empty crucible and cover. He then adds an unknown...
Post lab Questions: 1. While performing the formula of hydrate laboratory experiment, the lid accidently slips over the crucible to completely seal the crucible. a. What effect this change will cause on your calculated experimental results? Explain. b. Would your calculated percent water of hydration be high, low or unaffected? Explain your answer. 2. A student was asked to identify a sample of unknown hydrate. Student was provided with the following experimental data. 3.51 g sample of the hydrate when...
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...
Name Isis Collier Lab Section REPORT ON EXPERIMENT 3 Introduction to Gravimetrie Analysis Date 1919 Assigned Salt USALL CHLORIDEHYDRATE Formula Weight Locle X HD DATA AND RESULTS Trial 1 Trial 43.8119- 43.4019 mass of crucible, cover, and hydrated salt tared-mass mass of hydrated salt 43.8179 mass of crucible, cover, and residue after heating mass of anhydrous salt 0.5219 moles of anhydrous salt 0.00407445/wCelle mass of water lost 0.926 percent by mass of water in hydrate 80.53% moles of water lost...
Experiment 3 Prelaboratory Assignment Empirical Formulas Date Lobo Sec. Name Desk No. 1. Elemental mercury was first discovered when a mercury oxide was decomposed with heat, forming mercury metal and oxygen gas. When a 0.204-g sample of the mercury oxide heated. 0.189 g of mercury metal remains. Note: not attempt this experiment in the laboratory because of the release of toxic mercury vapor. a. What is the mole ratio of mercury to oxygen in the sample? b. What is the...
Sample 2 97.79 g 102.95 g 101.15 g Sample 1 (a) Mass of 98.32 g crucible + lid (b) Mass of crucible, lid + 103.76 g KCIO3 (c) Mass of crucible, lid + 102.01g residue after 1st heating (d) Mass of crucible, lid + residue after 101.69 g 2nd heating (e) Mass of crucible, lid + 101.68 g residue after 3rd heating 101.05 g 101.01 g Data Analysis .Use your data to determine the experimental mass percent of oxygen in...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 11 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 11 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 11 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 11 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 11 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 11 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 11 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 11 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 11 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 11 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 11 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 11 months ago