Laboratory for the Week of November 27, 2000 (Both sections are doing the same experiment)

Section 2 HBL

This week we will do Experiment 12: Molecular Architecture. You should be able to do the Pre-Lab Questions 1 and 2. Question 3 is a little more difficult. Give it a try. Be sure to bring your textbook to laboratory.

Section 3 Non-HBL

This week we will do Experiment 12: Molecular Architecture. You should be able to do the Pre-Lab Questions 1 and 2. Question 3 is a little more difficult. Give it a try. Be sure to bring your textbook to laboratory.

Laboratory for the Week of November 20, 2000

Section 2 HBL

This week only Monday, Tuesday and Wednesday laboratory sections will meet. Besides discussing the exam you will do an InClass Problem Set. Be sure to bring your textbook and a calculator to laboratory.

Section 3 Non-HBL

This week only Monday, Tuesday and Wednesday laboratory sections will meet. You will do Exp #10: Conductivity. This is a great experiment to help you understand ionic and net ionic equations. Check out the pre-laboratory problems and do them before coming to class. The TA's have expressed some concern that some students are omitting the pre-laboratory problems. Those are important, so be sure to take some time to work on them. DO NOT FORGET SAFETY GLASSES...NO SHORTS!

Laboratory for the Week of November 13, 2000

Section 2 HBL

This week we are completing Exp #8: Can to Crystals an exploration into various chemical properties of soft drinks. Most everyone should have completed the first two hypotheses last week. To begin with the molecular world may be considered a fractal of the animal world, considering the way wolves attack sheep. It is therefore hypothesizes that molecules in solids are attacked by molecules in solution at the most vulnerable points of the solid (corners and edges). It is also hypothesizes that the driving force of chemical reactions is towards more disorder in the universe. As a result, it is inferred that spontaneous reactions should only occur when the products are more disordered than the reactants. For the third hypothesis one considers how beautiful and organized solids are, it is hypothesizes that crystals steal their organization from the surfaces on which they form.

For this experiment please bring a pull tab from a soft drink can to laboratory. You will be working with KOH and H2SO4. Both of these compounds are dangerous. So you these chemicals with care, keep your gogles on and if you spill or either on your cloths are body rinse immediately. DO NOT FORGET SAFETY GLASSES...NO SHORTS!

Section 3 Non-HBL

This week you are doing the experiment, 'Exp #9: Heats of Reaction' It is in your CHEM 1314 Laboratory Manual, so be sure to bring it to laboratory. In this experiment you are going to verify Hess' Law by measuring the heat associated with three neutralization reactions. This is a good experiment this week since a portion of Exam III covers thermochemistry. DO NOT FORGET SAFETY GLASSES...NO SHORTS!

Laboratory for the Week of October 30, 2000

Section 2 HBL

This week we are doing Exp #7:Yellow Dye - Concentration an exploration into various chemical properties of soft drinks. Ever wondered about some of the chemistry in the soft drinks you ingest everyday? We are going to focus on four Hypotheses...1) it is hypothesized that pop fizzes when you pour it because it contains more human waste product (CO2) than is found in the air. 2) it is hypothesized that when pressure is applied to gas above water, the gas can be squeezed into the space between the water molecules, a space equal to about (1/6) of the volume of the water molecules themselves (that is, the ratio of gas molecules to water molecules can range up to 1 gas molecule per 6 water molecules). When a can is ripped open is is discovered the can isn't all metal. 3) it is hypothesized that pop cans are lined with plastic because pop contains more than 1 ppm by weight citric acid. And a student in a wine tasting class suggested this might be done by manufacturers to increase production of saliva. (Acids can react with metals. In fact, some work suggests that acids also eat away at calcium in bone tissue. Since women tend to lose calcium eventually leading to osteoporosis, this is not a good thing.) 4) it is hypothesized that dyes stain just about everything they touch because they are really small (diameter less than 5 nanometers). The pop provided contains Yellow Dye #5. (Some dyes are REALLY not healthy for you!) DO NOT FORGET SAFETY GLASSES...NO SHORTS!

Section 3 Non-HBL

This week you are doing the experiment, 'Exp #8: Acid-Base Titration' It is in your CHEM 1314 Laboratory Manual, so be sure to bring it to laboratory. In this experiment you are going to learn titration techniques. You will standardized a solution of sodium hydorxide using a primary standard called potassium hydrogen phthalate. THen you will be given an unknown acid and asked to determine its concentration. So be careful standardizing your base and good luck finding out the concentration of your unknown acid. Do not forget to add phenophthalein to your samples. Has anyone seen phenophthalein as an ingradient in an over the counter product? DO NOT FORGET SAFETY GLASSES...NO SHORTS!

Laboratory for the Week of November 6, 2000

Section 2 HBL

This week we are completing Exp #7:Yellow Dye - Concentration an exploration into various chemical properties of soft drinks. Most everyone should have completed the first two hypotheses last week. So this week we'll find out how much citric acid is in the soft drink and the size of a yellow dye molecule...cool! Ever wondered about some of the chemistry in the soft drinks you ingest everyday? We are going to focus on four Hypotheses...1) it is hypothesized that pop fizzes when you pour it because it contains more human waste product (CO2) than is found in the air. 2) it is hypothesized that when pressure is applied to gas above water, the gas can be squeezed into the space between the water molecules, a space equal to about (1/6) of the volume of the water molecules themselves (that is, the ratio of gas molecules to water molecules can range up to 1 gas molecule per 6 water molecules). When a can is ripped open is is discovered the can isn't all metal. 3) it is hypothesized that pop cans are lined with plastic because pop contains more than 1 ppm by weight citric acid. And a student in a wine tasting class suggested this might be done by manufacturers to increase production of saliva. (Acids can react with metals. In fact, some work suggests that acids also eat away at calcium in bone tissue. Since women tend to lose calcium eventually leading to osteoporosis, this is not a good thing.) 4) it is hypothesized that dyes stain just about everything they touch because they are really small (diameter less than 5 nanometers). The pop provided contains Yellow Dye #5. (Some dyes are REALLY not healthy for you!) DO NOT FORGET SAFETY GLASSES...NO SHORTS!

Section 3 Non-HBL

This week you are doing the experiment, 'Exp #7: Reactions of Copper' It is in your CHEM 1314 Laboratory Manual, so be sure to bring it to laboratory. In this experiment you are going to do several reactions with copper, and its compounds. The first reaction to dissolve the copper metal is with concentrated nitric acid. Be very careful handling this material. Do the reaction between copper and nitric acid in the Hood! The brownish-red gas, nitrogen dioxide is poisonous so keep the fumes in the hood. DO NOT FORGET SAFETY GLASSES...NO SHORTS!

Laboratory for the Week of October 30, 2000

Section 2 HBL

This week we are doing Exp #7:Yellow Dye - Concentration an exploration into various chemical properties of soft drinks. Ever wondered about some of the chemistry in the soft drinks you ingest everyday? We are going to focus on four Hypotheses...1) it is hypothesized that pop fizzes when you pour it because it contains more human waste product (CO2) than is found in the air. 2) it is hypothesized that when pressure is applied to gas above water, the gas can be squeezed into the space between the water molecules, a space equal to about (1/6) of the volume of the water molecules themselves (that is, the ratio of gas molecules to water molecules can range up to 1 gas molecule per 6 water molecules). When a can is ripped open is is discovered the can isn't all metal. 3) it is hypothesized that pop cans are lined with plastic because pop contains more than 1 ppm by weight citric acid. And a student in a wine tasting class suggested this might be done by manufacturers to increase production of saliva. (Acids can react with metals. In fact, some work suggests that acids also eat away at calcium in bone tissue. Since women tend to lose calcium eventually leading to osteoporosis, this is not a good thing.) 4) it is hypothesized that dyes stain just about everything they touch because they are really small (diameter less than 5 nanometers). The pop provided contains Yellow Dye #5. (Some dyes are REALLY not healthy for you!) DO NOT FORGET SAFETY GLASSES...NO SHORTS!

Section 3 Non-HBL

This week you are doing the experiment, 'Exp #8: Acid-Base Titration' It is in your CHEM 1314 Laboratory Manual, so be sure to bring it to laboratory. In this experiment you are going to learn titration techniques. You will standardized a solution of sodium hydorxide using a primary standard called potassium hydrogen phthalate. THen you will be given an unknown acid and asked to determine its concentration. So be careful standardizing your base and good luck finding out the concentration of your unknown acid. Do not forget to add phenophthalein to your samples. Has anyone seen phenophthalein as an ingradient in an over the counter product? DO NOT FORGET SAFETY GLASSES...NO SHORTS!

Laboratory for the Week of October 23, 2000

Section 2 HBL

This week we are doing Exp #6: Air Pollution an exploration into air pollution, movement of gases an clouds. We are going to focus on three Hypotheses...1. That clouds form when the water molecules themselves are not travelling fast enough to avoid sticking to other water molecules. 2. Having completed analysis of when clouds form, the second hypothesis is that those small droplets in the cloud can suck up NOx from gases in a chamber such as the Petri dish or the Los Angeles basin. 3. It is hypothesizes that acid gases in clouds are bad things since once the acid is in the rain drops, it can move with the cloud as the droplets evaporate and reform. This will be a fun experiment. Were you able to produce a tornado? DO NOT FORGET SAFETY GLASSES...NO SHORTS!

Section 3 Non-HBL

This week you are doing the experiment, 'Exp #11: Solubility' It is in your CHEM 1314 Laboratory Manual, so be sure to bring it to laboratory. In this experiment you are going to determine the solubility of a number of new and interesting compounds. One thing you should be aware of is the recommended number of drops of each reagent. Instead of 10 drops, try 5. Everything will work just as easily, but you will spend less time counting drops. DO NOT FORGET SAFETY GLASSES...NO SHORTS!

Laboratory for the Week of October 16, 2000 (This week's laboratory can be done at home, in your dorm or in any one of the campus computer laboratories.) Right now do not worry about Page 9 of the laboratory experiment.

Section 2 HBL

This week we are all doing MoLE Gas Laws Activity using the Gas Law Animation Computer software. Remember you must be using Microsoft's Internet Explorer version 4.5 or higher to access this software. It WILL NOT work with Netscape. Right now do not worry about Page 9 of the laboratory experiment.

Laboratory Experiment document...MoLE Gas Laws Activity

Computer Software...Gas Law Animation

Microsoft Internet Explorer...Microsoft's Internet Explorer

The laboratory Experiment write-up is due by 5:00 pm of the day of your laboratory in my office PS155.

Section 3 Non-HBL

This week we are all doing MoLE Gas Laws Activity using the Gas Law Animation Computer software. Remember you must by using Microsoft's Internet Explorer version 4.5 or higher to access this software. It WILL NOT work with Netscape. Right now do not worry about Page 9 of the laboratory experiment.

Laboratory Experiment document...MoLE Gas Laws Activity

Computer Software...Gas Law Animation

Microsoft Internet Explorer...Microsoft's Internet Explorer

The laboratory Experiment write-up is due by 5:00 pm of the day of your laboratory in my office PS155.

Laboratory for the Week of October 9, 2000

Section 2 HBL

This week we are doing THE IDEAL GAS LAW AND THE MOLECULAR WEIGHT OF GASES a non-HBL experiment. In fact both the 1:30 pm and the 3:30 pm lecture sections are doing the same laboratory experiment. Students in the 1:30 pm lecture section do not have copies of the laboratory experiment. I plan to distribute copies in class on friday, October 6, 2000. But if you do not get a copy click on the link above. The experiment is pretty straight forward, but there are some calculations. There will be a logistics problem for the HBL students.The HBL laboratory is on the 4th floor and the chemicals we are using in this experiment are not easily transported AND we need several balances because there are several weighing that must be performed. To handle this problem I have done some re-assignments of rooms for SOME of the HBL sections. Consult the table below to see where you will do your laboratory experiment;

Lab Section #

Lab Room

10

PS258

11

PS453

12

PS453

13

PS453

14

PS255

15

PS259

16

PS453

17

PS453

18

PS258

 

For the sections remaining in PS453 you will have to do some hiking...you will have to walk down (or elevator) to the 2nd floor to obtain your gas samples and then return to PS453 to do the measurements. Sorry about that! Be sure to do the pre-laboratory before laboratory. DO NOT FORGET SAFETY GLASSES...NO SHORTS!

Section 3 Non-HBL

This week you are doing the experiment, 'Exp #13: THE IDEAL GAS LAW AND THE MOLECULAR WEIGHT OF GASES' It is in your CHEM 1314 Laboratory Manual, so be sure to bring it to laboratory. In this experiment you are going to determine the molar mass of a gas. There are two knowns and one unknown. Be sure to do the pre-laboratory before laboratory. DO NOT FORGET SAFETY GLASSES...NO SHORTS!

Laboratory for the Week of September 25, 2000

Section 2 HBL

This week we are doing Moving Metal II another exploration into the reaction between metals and metallic ions. We are going to focus on the Hypothesis...1. After observing lightning bolts striking lakes near Stillwater, Rockley has hypothesized that electricity flows through solutions by means of electrons which flow from the positive terminal of the battery to the negative terminal of the battery. 2. Rockley further hypothesizes that electrons are attracted to positive ions in solution. DO NOT FORGET SAFETY GLASSES...NO SHORTS!

Section 3 Non-HBL

This week you are doing the experiment, 'Exp #4: Formula of a Hydrate' It is in your CHEM 1314 Laboratory Manual, so be sure to bring it to laboratory. In this experiment you are going to determine the number (mols) of waters of hydration associated with a particular ionic compound. You will do this for two different substances. Be sure to do the pre-laboratory before laboratory. DO NOT FORGET SAFETY GLASSES...NO SHORTS!

 

Laboratory for the Week of September 18, 2000

Section 2 HBL

This week we are doing Moving Metal I an exploration the reaction between metals and metallic ions to try to find out about relative strengths of reactivity. We are going to focus on the Hypothesis...Realizing that inert gases are stable, Rockley hypothesizes that the 'electron-pushing' strength, or 'pecking order' is determined by how close the metal is to the nearest inert gas. Thus, the elements that are closer to the inert gases will have a greater "electron-pushing" ability. You will also receive your exams back in laboratory this week. Remember if you have ANY questions, return your exam to your TA during this laboratory. DO NOT FORGET SAFETY GLASSES...NO SHORTS!

Section 3 Non-HBL

This week you are doing the experiment, 'Exp #3: Empirical Formula' It is in your CHEM 1314 Laboratory Manual, so be sure to bring it to laboratory. In this experiment you are going to determine the empirical formula of a compound which contains the elements magnesium and oxygen. Read the experiment carefully and do the Pre-Laboratory questions BEFORE coming to laboratory. Look over the Post-Laboratory questions also. You will also receive your exams back in laboratory this week. Remember if you have ANY questions, return your exam to your TA during this laboratory. DO NOT FORGET SAFETY GLASSES...NO SHORTS!

 

Laboratory for the Week of September 11, 2000

Section 2 HBL

This week we are doing Vitamin C in Punch an exploration into the vitamin C in fruit drinks. We are going to focus on the Hypothesis...''High-C' Fruit Punch could be an advertising gimmick. Rockley has this wild notion that nature provides the optimum source of Vitamin C in freshly squeezed orange juice which also contains fruit enzymes. Therefore, Rockley hypothesizes that to dissolve amounts of Vitamin C equal to or larger than 0.500g./L (the amount present in OJ) fruit enzymes must be present in the solution as well. If this is true, one inference would be that High-C is not worthy of its name since High C appears not to contain fruit enzymes and so couldn't possibly have more Vitamin C in it that OJ.

Section 3 Non-HBL

This week you are doing your first experiment, 'Exp #2: Separation of Solids' It is in your CHEM 1314 Laboratory Manual, so be sure to bring it to laboratory. In this experiment you are going to separate a mixture into its components. Read the experiment carefully and do the Pre-Laboratory questions BEFORE coming to laboratory. Look over the Post-Laboratory questions also. There is just enough time to do the experiment, complete the calculations and answer the questions. If you do not prepare for this experiment you may not be able finish the write up, costing you some points. DO NOT FORGET SAFETY GLASSES...NO SHORTS!

Laboratory for the Week of September 4, 2000

Section 2 HBL

This week we are doing Not Enuff Stuff a further exploration into the behavior of the eight solutions we first encountered during the week of August 28th. We are going to focus on the Hypothesis...'Atoms or groups of atoms which carry charges (ions) balance the charges so that there are as many negative charges as there are positive charges in a precipitating solid compound made by combining ions.' Be sure to print the laboratory experiment write-up out before you come to class. DO NOT FORGET SAFETY GLASSES...NO SHORTS! You might also look at the lecture notes for this Wednesday, September 6th.

Section 3 Non-HBL

This week you are doing your first experiment, 'Exp. #1: Measurement of Matter' It is in your CHEM 1314 Laboratory Manual, so be sure to bring it to laboratory. This experiment can be finished and written up during laboratory so come prepared to do the experiment and write it up. I recommend you bring your calculator to laboratory (do you have your name on your calculator?). Read the experiment before coming to laboratory it will help you move more efficiently through the experiment. In this experiment you are going to learn about some different measuring devices we will use this semester and how to read them correctly. Also if you have time your TA may be able to help you with PS2. DO NOT FORGET SAFETY GLASSES...NO SHORTS!