A student did this experiment and found her mixture was 15.05% NH4CL, 19.95% NaCl and 75.10%...
A student did this experiment and found her mixture was 15.05% NH4CL, 19.95% NaCl and 75.10% sand. What's wrong with these numbers and what might have caused the problem?
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A student did this experiment and found her mixture was 15.05%
NH4CL, 19.95% NaCl and 75.10%...
1.A Chem 1211L student performed this experiment. He used 3.100 g of mixture and determined it...
1.A Chem 1211L student performed this experiment. He used 3.100 g of mixture and determined it contained 1.200 g of NH4Cl , 0.685 g of sand and 1.410 g of NaCl. What is wrong with the student’s results? What is the most likely cause of the error? 2..755 mL of a solution contains 175 mL acetone, 325 mL alcohol and the remainder is water. Calculate the % concentrations of the acetone, alcohol and water. Show all work to receive credit.
A mixture was found to contain 1.20 g of NH4Cl, 0.90 g of NaCl, and 1.20...
A mixture was found to contain 1.20 g of NH4Cl, 0.90 g of NaCl, and 1.20 g of SiO2. What is the percentage of Ammonium Chloride in this mixture?
Question 2,3,4 please. ESTIONS: 1. Many students do not recover 100% of the original mixture. Describe...
Question 2,3,4 please.
ESTIONS: 1. Many students do not recover 100% of the original mixture. Describe at least two possible problems that could cause less than 100% recovery of the mixture. 2. A student received a mixture that actually contained 50.0% salt and 50.0% sand. At the end of the experiment, this student calculated that his sample was composed of 45.2% salt and 54.8% sand. What might he have done (or not done correctly) during the experiment to cause this...
SUU Cellulose = 0.699 Calcium carbonate = 1.82g 9. How could you separate a mixture of...
SUU Cellulose = 0.699 Calcium carbonate = 1.82g 9. How could you separate a mixture of ac 1.osg +0.699+ 1.229 w could you separate a mixture of acetone and a-naphthol? Consult Table 2.1 for physical properties. db 10. How could you separate zinc chlor you separate zinc chloride from Sio 2 A student found that her mixture was 13% NH CI, 18% NaCl, and 75% SiO2. Assuming that her calculations are correct, what did she most likely do incorrectly in...
A student studied the clock reaction described in this experiment. She set up Reaction Mixture 2...
A student studied the clock reaction described in this experiment. She set up Reaction Mixture 2 by mixing 20 mL 0.010 M KI, 10 mL .001 M Na2S2O3, 10 mL .040 M KBrO3, and 10 mL 0.10 M HCl using the procedure given. It took 45 seconds for the color to turn to blue. a. She found the concentration of each reactant in the reacting mixture by realizing that the number of moles of each reactant did not change when...
A student at another university repeats the experiment you did in lab. Her target ball is...
A student at another university repeats the experiment you did in lab. Her target ball is 0.860 m above the floor when it is in the target holder and the steel ball she uses has a mass of 0.0120 kg.She finds that the target ball travels a distance of 1.50 m after it is struck. Assume g = 9.80 m/s2. What is the kinetic energy (in joules) of the target ball just after it is struck?
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,...
Experiment 21 Advance Study Assignment: Rates of Chemical Reactions, II. A Clock Reaction 1. A student...
Experiment 21 Advance Study Assignment: Rates of Chemical Reactions, II. A Clock Reaction 1. A student studied the clock reaction described in this experiment. She set up Reaction Mixture 4 by mixing 10 mL 0.010 M KI, 10 mL 0.001 M Na2S2O3, 10 mL 0.040 M KBrO3, and 20 mL 0.10 M HCl using the procedure given. It took about 21 seconds for the color to turn blue. a. She found the concentrations of each reactant in the reacting mixture...
A student attempted to identify an unknown compound by the method used in this experiment. Her or...
A student attempted to identify an unknown compound by the method used in this experiment. Her original sample weight was 0.7047 g. When heated in the first step, the mass decreased to 0.4862 g Write the complete, net balanced reaction that would occur in this experiment if - the student's unknown compound was NaHCO3 -the student's unknown compound was KHCO3 Using stoichiometry, predict the theoretical yield of the solid chloride obtained at the end of the student's experiment if -...
This is a better photo Section Name Experiment 21 Advance Study Assignment: Rates of Chemical Reactions,...
This is a better photo
Section Name Experiment 21 Advance Study Assignment: Rates of Chemical Reactions, II. A Clock Reaction 1. A student studied the clock reaction described in this experiment. She set up Reaction Mixture 2 by mixing 20 ml. 0.010 M KI. 10 mL 0.0001 M Na.S.0. 10 mL 0.040 M KBrO and 10 ml, O.10 M HCT using the procedure given. It took about 45 seconds for the color to turn bluc. She found the concentrations of...
Question 2,3,4 please.
ESTIONS: 1. Many students do not recover 100% of the original mixture. Describe at least two possible problems that could cause less than 100% recovery of the mixture. 2. A student received a mixture that actually contained 50.0% salt and 50.0% sand. At the end of the experiment, this student calculated that his sample was composed of 45.2% salt and 54.8% sand. What might he have done (or not done correctly) during the experiment to cause this...
SUU Cellulose = 0.699 Calcium carbonate = 1.82g 9. How could you separate a mixture of ac 1.osg +0.699+ 1.229 w could you separate a mixture of acetone and a-naphthol? Consult Table 2.1 for physical properties. db 10. How could you separate zinc chlor you separate zinc chloride from Sio 2 A student found that her mixture was 13% NH CI, 18% NaCl, and 75% SiO2. Assuming that her calculations are correct, what did she most likely do incorrectly in...
A student attempted to identify an unknown compound by the method used in this experiment. Her original sample weight was 0.7047 g. When heated in the first step, the mass decreased to 0.4862 g Write the complete, net balanced reaction that would occur in this experiment if - the student's unknown compound was NaHCO3 -the student's unknown compound was KHCO3 Using stoichiometry, predict the theoretical yield of the solid chloride obtained at the end of the student's experiment if -...
This is a better photo
Section Name Experiment 21 Advance Study Assignment: Rates of Chemical Reactions, II. A Clock Reaction 1. A student studied the clock reaction described in this experiment. She set up Reaction Mixture 2 by mixing 20 ml. 0.010 M KI. 10 mL 0.0001 M Na.S.0. 10 mL 0.040 M KBrO and 10 ml, O.10 M HCT using the procedure given. It took about 45 seconds for the color to turn bluc. She found the concentrations of...
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