Southern Union State Communit

I don’t know how to handle this Chemistry question and need guidance.

https://suscc.instructure.com/courses/1459143/file...

PROCEDURE:

Watch the video to get your data for the blank data report!

2) The lab has been recorded as the directions that follow: Wear your goggles. Place the empty weighing boat (1) on the balance and record its mass. Pick up the weighing boat (2) with the sample mixture and hold its left lip over the center of the empty weighing boat (1). Press “p” to dump the sample into the empty weighing boat (1). Record the combined weighing boat (1) and samples mass. Return the weighing boat (1) to the table.

3) Mass the empty boat (2) and record its value. To the right is a strong magnet contained in a plastic bag. Pick up the bag and move the magnet end around in the sample you massed in step #1. The magnet will pick up any iron found in the sample and appear as a brown coating on the outside of the bag. Move the bag over to the empty weighing boat (2) and hold it centered and above the boat. Press “p” to move the magnet up within the bag which will cause the iron to fall from the outside of the bag and into the empty boat. Mass the weighing boat (2) and the newly collected iron and record. Place the weighing boat (2) containing iron to the side, you will not need them anymore.

4) Pick up filter paper cone, place it on the balance and record its mass. Place the filter paper cone in the funnel hanging from the ring stand on the left of the screen. Pick up weighing boat (1), that contains what is left of your sample, and hold the left lip centered over the filter paper now in place. Press “p” to pour your sample into the filter paper.

5) Mass the beaker and record its value. Place the beaker directly under the filter paper on the table. Pick up the water bottle and hold the spout centered above the filter paper. Press “p” 4 times squirting a quantity of water into the filter paper. Set the water bottle down and wait for the water to drain through the filter paper and into the beaker. Since salt is soluble in water, the water you just added to the filter paper and sample will dissolve in the water, pass through the filter paper and collect in the beaker as a solution. The sand which is not soluble in water will collect in the filter paper.

6) Place the beaker and salt water you just collected on the hot plate. Here the water will evaporate and leave the salt behind within the beaker. Once the water has been removed, set the hot beaker on the table. The table is heat resistant and will allow the beaker to cool. Place the beaker containing salt on the balance and record their combined mass. Set the beaker aside, you will not need it anymore.

7) Place the evaporating dish on the hot plate. Pick up the wet filter paper containing sand and drop it into the evaporating dish. The evaporating dish will modify the heat of the hot plate and allow the water to evaporate without burning the filter paper. Place the now dry filter paper on the balance and record the combined mass of filter paper and sand. The paper has a low density and will not harm the balance after heating.

8) Record and calculate the values asked for on the lab sheet

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Southern Union State Communit

PROCEDURE:

1) The lab has been recorded as the directions that follow: Record the mass of the empty beaker and paper cup.

2) Drag the copper(II) sulfate containing spoon to a position directly above the beaker and press the “p” key. The copper(II) sulfate sample will be dropped into the beaker. Use the balance to determine the combined mass of the beaker and copper(II) sulfate sample. Record this value.

3) Fill the beaker about 2/3 full with water from the faucet. Place the beaker on the hot plate and turn the hot plate on. Slide the red temperature lever, in the front, to about 2/3 of the way to the right. Copper(II) sulfate will dissolve in water on its own but our large crystal sample would take too long. Heat speeds up the dissolving process. Note any color change in the water.

4) Drag the Fe bearing spoon so it is directly above the paper cup and press “p” to dump the Fe in the cup. Determine the combined mass of the paper cup and Fe sample and record.

5) Place the hot beaker on the table. Drag the paper cup (containing the Fe) so that the left corner of the paper is centered over the opening in the beaker. Press “p” to dump the Fe into the beaker. Note any changes in the beakers contents.

6) The Fe and copper(II) sulfate have fully reacted and Cu has been released. Iron(II) sulfate has also been produced but has dissolved in the water and cannot be seen. Some excess copper(II) sulfate is also dissolved in the water.

7) Hold the beaker over the sink and press “p” to pour out all of the unwanted water and compounds. Fill the beaker about 1/4 full and dump into the sink by pressing “p”. Repeat. This washes out any unwanted materials from our copper metal. Note that due to the higher density of the copper, it remains in the beaker.

8) Place the beaker on the warmed hot plate and heat for a short time. This drives off any left overwater. Mass the beaker containing the copper and record.

6) Calculate the requested values asked for on the lab sheet.

Stoichiometry Lab

Assistance with the lab:

1. To find a chemical formula, NaCl for example, look it up on the internet or your book.

2. To calculate moles (mol) for Na, first look up atomic weight of sodium (Na) on periodic table or internet, 22.99

Next calculate mass of Sodium chloride (NaCl), Na atomic weight 22.99 and Cl atomic weight 35.45, add them together 22.99 + 35.45 = 58.44 g.

Now, 22.99g/58.44g = 0.3933 mol Moles = mass/atomic mass.Error = O – A 4. % Error = error/ A x 100

Use the blue button that says Special for help too. This button is on top left of your lab page when signed into your lab.

Mass Cu (g): _____ Observed value (O)

Observations: When heating the CuSO4: you should have noted that the lump of CuSO4 decreased while heating and the solution became a darker blue color (more dissolved CuSO4).

After the Fe was added to the CuSO4 solution: the student should have noted that the lump of Fe disappeared, the solution decreased in blue color and the copper metal appeared.

From Calculations

Moles of CuSO4 = grams of CuSO4 / atomic mass of CuSO4 = ________ mol (Excess Reactant)

Moles of Fe = grams of Fe / atomic mass of Fe =_________ mol (Limiting reactant)

Balanced equation: CuSO4 + Fe —– Cu + FeSO4

Ratio of reactant Fe to product Cu = 1:1

role ration for equation = mol of Fe / coefficient of Fe = mol of Cu / coefficient of Cu

= _____/1 = unknown Cu/1

unknown Cu = _____ mol

Mass of Cu = mol of Cu x atomic mass of Cu

= ______ g (Accepted value)

Error = O – A

= ____ g

% Error = Error / A x 100

= ______ % https://suscc.instructure.com/courses/1459143/files/70400535/download?verifier=ejmNa6TpCjaJXrUJyGULQwtPCZkxVkSNEv5TaA5S&wrap=1

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Southern Union State Communit


1) Print Blank Report or type the blank report exactly the same” used as a lab report. Watch the video to get your data for the blank data report!

The lab has been recorded as the directions that follow:

2) The source of the electric current within this lab is provided by one or more 1.5 volt batteries located at the top of the screen. Although their ratings are noted as 1.5 volt, in reality they will vary from that value. Turn on the voltmeter by clicking on the button at the base of the unit and move it closer to the circuit diagram. Drag the black clip from the voltmeter over to the clip marked “a” and attach it (just release it). Now drag the red clip from the voltmeter over to the far right bottom of the screen and attach it to the clip marked “h”. Record the voltmeter value in volts. This is the voltage of the circuit. Release the two voltmeter clips.

3) Turn on the Ammeter and move it closer to the circuit. The circuit diagram has the letter “A” in a circle near the bottom of the screen. This is a symbol that indicates where the ammeter should be attached. Attach the ammeter’s black clip to clip “g” and the red clip to clip “h”. Since at this time the circuit is not complete, a reading of 0 should be noted.

4) Make sure the wire “jumper” is in place by dragging it to the right. This closes the upper part of the circuit. There are three positions that resistors can take in the circuit. They are labeled “1”, “2” and “3” and have a light gray rectangle around their location. Along side of the rectangle is the symbol for a resistor. Drag resistor “A” over and drop it into the rectangle symbol marked “2”. It should clip in place and you should get a reading on the ammeter. Record this reading as shown in amps. Put the resistor “A” back and place resistor “B” in its place. Record the reading. Lastly record the value for resistor “C”. Put resistor “C” back.

5) Slide the “jumper” over to the left and open up the circuit between “a” and “b”. Place resistor “A” in slot “1” and resistor “B” in slot “2”. Record the value on the ammeter. These two resistors and now in a series configuration. Put the resistors back.

6) Slide the “jumper” over to the right and close the circuit between “a” and “b”. Place resistor “A” in slot “2” and resistor “B” in slot “3”. Record the value on the ammeter. These two resistors and now in a parallel configuration. Put the resistors back.

7) Slide the “jumper” over to the left and open up the circuit between “a” and “b”. Place resistor “C” in slot “1”, “A” in slot “2” and resistor “B” in slot “3”. Record the value on the ammeter. The resistors are in a combination series and parallel configuration. Keep the resistors in this position for the next procedure.

8) Connect the voltmeter’s black clip to clip “a” above resistor “C”. Connect the red clip to clip “b” below resistor “C”. This now measures the voltage across resistor “C” in this circuit. Record the voltage. Move the voltmeters clips to clips “c” and “e” across resistor “A”. Record the voltage. Move the voltmeters clips to clips “d” and “f” across resistor “B”. Record the voltage. NOTE: if you get a negative voltage, reverse the voltmeters clips.

9) Calculate the requested values asked for on the lab sheethttps://suscc.instructure.com/courses/1459143/files/70400538/download?verifier=AXluTwOgApnXu0s3vfimyaewloApzInWW9vAXbIv&wrap=1

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Southern Union State Communit

PROCEDURE:
1) Print Blank Report or type the blank report exactly the same” used as a lab report. Watch the video to get your data for the blank data report!

All the directions below have been done for you in the Specific Heat of a Metal “Video”. Watch the video as you read the directions. All of your data will come from the video.

2) Record the room temperature. The water in the faucet has been setting in this room for some time and is at room temperature.

3) Drag the styrofoam cup over to the balance and note its mass. Move the cup to the sink and fill it about 2/3 full of water. Return the cup to the balance and note its mass. You will need at least 100 grams of water.(don’t forget to subtract the mass of the cup) Record this mass of water. Don’t fill the cup too much since you must leave room for the metal cube later on.

4) Drag the cube of metal to the balance and record its mass.

5) Drag the beaker over to the sink and fill 2/3 full with water. Drop the metal cube into the beaker and then drop in the thermometer. Place the beaker on the hot plate, turn on the hot plate and slide the control lever to the right. You are now heating up the water and metal cube to a high level.

6) When the temperature of the water stops rising, record this value as the initial temperature of the metal. This hot plate does not have quite enough power to make water boil!

7) Take the thermometer from the hot beaker and place it on the table. The table will transfer the heat from the thermometer quickly and return it to room temperature. Transfer the metal cube from the hot water to the cup. Place the thermometer on the cup. Note that the temperature of the water heats up as energy is transferred from the metal cube.

8) When the temperature stops climbing, record this value as the final temperature of metal and water. NOTE: the thermometer and container itself have their own specific heat and would slightly effectour outcome. Styrofoam is an excellent insulator and would have little effect and the mass of the thermometer exposed to the water is small, thus we will ignore their presence.

9) Calculate the requested values asked for on the lab sheet. https://suscc.instructure.com/courses/1459143/files/70400541/download?verifier=3ZV2co7h6Da31rAyovLWWR30Ub2PhtFNAsi6yhml&wrap=1

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Southern Union State Communit

https://suscc.instructure.com/courses/1459143/file…

PROCEDURE:

Room 1:

1) “Print Blank Report or type the blank report exactly the same” used as a lab report. Watch the video!

The lab has been recorded as the directions that follow:

2) If the car isn’t all the way to the left on the table, then push it over so that it is. The stands up on the right shelf are photo gates and can be moved by dragging their base. They project infrared light in a beam and determine if anything is passing in front of it by detecting infrared light bouncing off of that passing object. The photo gate must be turned on to work (a small button on the left side of the base) and the emitter (the square object on the vertical rod) must be adjusted to the proper height. It is possible for an object to go under the beam and not be detected. There is a tape measure on the table. If you click on the black button you can then move the tape body and make the graduated tape come out. Click again on its button and then the whole tape measure may be moved. Notice that the tape is graduated in cm with every 10 cm marked with a number.

3) Place photo gate 1(PG1) about 20 cm to the right of the nose of the car. Place PG2 more to the right (your choice where) and finally PG3 further to the right. Turn each on and set their emitter as far down as it will go. Use the tape measure to determine the distance from PG1 to PG2 and record. Record the distance from PG1 to PG3. The distance from PG2 to PG3 need not be recorded. Turn on the receiver, the large unit on the left shelf, by clicking on the On / Off button. Set the selector button, on the left of the unit, so that the “Multiple” setting is selected. Note that PG1, 2 and 3 are listed on the screen.

4) With the car in its far left position, click on its start button to the rear of the car. The car will move to the right and stop when it reaches the right of the screen. As it moves past PG1 – 2 and 3, the receiver will record the time the car takes to travel from PG1 to PG2 and from PG1 to PG3. Record these two times. The reason you placed PG1 a few cm to the right of the car is to make sure that the car reaches a constant velocity before any times are taken. These cars almost jump to constant velocity immediately but its best to make sure by giving it a little distance. Calculate the average velocity for the car from PG1 to PG2 and record. Do the same for PG1 to PG3 and record. For help on these values read at the bottom. You may wish to reset PG2 and PG3 to different distances and recalculate the average velocities, they should all be the same. Move to room 2.

Room 2:

5) Again place the car to the far left. Measure the length of the car and record. Place PG1 in the middle of the table, adjust the emitter and turn on the unit. Turn on the receiver and set it to “Single” reading. Here the receiver will start measuring time when the nose of the car passes the center of the photo gate and then record when the car’s tail passes by. Start the car and record the time it takes to pass by PG1. (note that PG1a will always read 0.000 sec.). Calculate the velocity of this car and record. Move to room 3.

Room 3:

6) The velocity of each car has already been determined, in this room, and is listed above the individual car, record their values. Take the tape measure and determine the distance from the nose of the left car to the nose of the right car and record. Calculate the time it will take for each of the cars, when started at the same time, to collide in the middle of the table.(View Data and Hints will help here below) Record the time you calculated. Calculate and record how far the left car will travel in this time and place the marker found on the shelf on this spot. This actually represents where the right car will be also at the end of the run. Push the button on the remote unit to start the two radio controlled cars at the same time. Observe how close you were to the actual spot where the collision takes place. The computer will record how close you were. If you press reset, unlike room 1 and 2, a new set of velocities will be generated and new calculations will be needed.

NOTE: these cars reach constant velocity so fast that we can ignore any distance traveled while accelerating up to their constant velocity and use the distance from nose to nose in our calculations.

7) Calculate the requested values asked for on the lab sheet

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