Use latex gloves to prevent the oil from the hands to come in contact with the spoon 2.) Fill one beaker with 100 ml of Copper (II) sulfate solution at .5 mol/dm3 concentration 3.) With the alligator clips, attach one copper strip to a wire. This copper strip will act as the anodes 4.) Connect one of the wires attached to the copper strips to the positive electrical output of the power pack 5.)
Then the copper solution was poured into the test tube until it reached that point. After that a very small amount of zinc powder was measured by using a spatula and put into a test tube. Experiment 2: Constructing a zinc/copper cell 30 〖cm〗^3of 1.0 M zinc sulfate and 1.0 M copper sulfate were used as electrolytes and poured into separate beakers. The zinc and copper were cleaned with emerging paper before usage. Each electrode was placed in its correspondent solution (Note: if the metals’ places were accidentally changed, some defilement can occur.
Repeat step 5 for 1 and 2 M HCL and keep all the acids ready on the working bench. 7. Immediately put the flask to the prepared gas delivery system. Attach the delivery tube to the gas syringe, and make sure the bung is securely attached to the other end of the delivery tube. 8.
To do this, put 10-15 mL of solution in a test tube and secure it to the stand. Then take a stopper with two holes on the top, and in one hole put the tube, and in the other put the lab quest ( to keep track of the temperature). Fill a beaker with cold water and put another test tube inside of it and
Calibrating pressure gauges: The cylinder of the pressure gauge unit is loaded with weight support. There are some steps to cunduct the operation: 1. Unscrew pressure relief knob 2. Press down weight support 3. Screw in pressure relief knob Firstly, press down the hand lever while lifting the cylinder gradually with weight support up to the moment it floats on the oil with sufficient guidance.
This weight was recorded to four significant figures. After this, piece of magnesium was wrapped around the tip of copper wire. Following this, the buret was filled with about 10.0 mL of concentrated HCL and water was added until the buret was full. The copper wire with the magnesium was then putted into the buret and held in place with the rubber-stopper to make sure the copper wire wouldn't fall to the bottom. Distilled water was pure into the rubber-stopper to make sure the buret was completely filled and to make sure there wouldn't be any bubble.
Removed that comb and tape. Filled the gel box with TAE buffer until it covers the entire surface of the gel. Placed gel tray in the electrophoresis gel box (comb at the negative end). Obtained tubes containing a standard DNA marker, DNA from crime scene cut with enzyme 1, and DNA from crime scene cut with enzyme 2. Loaded lanes 1-7 with our 30μl of each of our samples, using a fresh micropipette tip after each use.
The roll welding experiments were carried out using a technical lab rolling machine with 170 mm roll diameter, 36 rpm of rotational speed and a power capacity of 35hp is used. To protect the rolling machine from damage caused by current ‘‘leakage’’, ceramic sleeves were applied on the roll shafts for electrical insulation. After surface provision, the handling of strips was performed intently to eschew renewed contamination. The gap between surface provision and rolling process was kept to less than two minutes to avoid the formation of a thick and continuous oxide layer on the bond surfaces of the strips. Then, according to Figure 1(a), one end side of stacked strips were connected to a welding machine with capacity of 400 amperes.
One finger is place at the tip of the syringe to ensure air doesn’t enter it. The plunger of the syringe is pulled backwards to suck out all the air inside the leaf discs. While the finger is still placed at the tip of the syringe the plunger is now pushed inverts to ensure the solution enters the leaf discs. This is done with all 10 syringes. 9.
• Create the Basic Clamping Device: Take the two 30 mm angled pieces. One piece will be used as the top of the clamp, while the other piece will be the bottom. The top piece should be placed as a turned ‘L’, while the bottom piece should be placed on its edge, resembling a ‘V’ shape. Take the top piece, and cut out a small square or rectangular space at the center of its bottom angle. Drill two holes at the ends of it.