(0.050) (0.1) = 0.0083 moles b. Pour 8.3 mL of the stock solution to get the amount needed. c. Measure out 8.3 mL in a graduated cylinder 8. Exercise 8: a. 41.8 mL are used b. 0.00079 moles EDTA4- c. 0.00079 moles ZnI2 d. 0.0517 grams of ZnI2 are in the sample e. 0.0517/0.237= 21.8% f. Error Is 6.34% Lab Report: Part 1: In this lab we used the following supplies: * Zinc Iodide * Na2H2EDTA(s) * Calmagite indicator solution * pH 10 buffer solution * 6M Acetic Acid * Unknown Zinc Compound The main purpose for this part of the lab was to determine the amount of zinc ion in a sample of ZnI2 by titration.
To determine if hyphae grow at the same rate, graph the results of table 2 and compare the slopes of the 3 hyphae from the slide preparations. 11. To determine if mycalolide B affects fungal tip growth and nuclear position repeat all the steps except in step 2 need to add mycalolide B and let it incubate for 10 minutes. Make sure to label the slides with the
NaOH solution would be in excess and thus prepare 1 M of HNO3 solution in burette, which will be used in back-titration. 4. Determine the end point of the back-titration when NaOH solution changes its color into pink. Record the results of at least three titrations. (Make a rough titration first).
Make sure to keep time, read the spectrometer, and record the data. Note time to the nearest second and mix the contents of tubes 2 and 3 by pouring them back and forth twice. Mixing should be completed within ten seconds. 5) Add the reaction mixture to a cuvette by pouring or using eye dropper, wipe the outside, and place the cuvette in the spectrometer. Read the absorbance at 20 second intervals from the start of the mixing.
From your three trials, calculate the average volume of Na2S2O3 needed for the titration of 25.00mL of diluted bleach. 3. Use the average volume and the molarity of Na2S2O3 to determine the molarity of the diluted bleach. (Find moles of Na2S2O3, convert to moles of NaClO, and divide by volume of dilute bleach that was titrated in each trial to get M). 4.
Then you place another 200 gram mass on the 210 degree mark. Then we have to replace the mass at the 30 degree mark with two masses, one at the 0 degree mark and one at the 80 degree mark. Essentially we are trying to calculate the x and y component vectors of a 200g mass at 30 degrees. So what we did was we just guess and checked the variables of weight at the 0 degree mark and at the 90 degree mark’s pullys until the ring was centered. You can us+e the weight on each pully to calculate the magnitude and the direction of the component vectors at 90 and 0 degrees.
More the paperclips, heavier it is. Research Question: How does the weight affect the time of a rotocoptor falling from a distance? Variable Chart: |Controlled Variable |Independent Variable |Dependant Variable | |Distance between the floor and the height where the |Weight of the rotocoptor- will be determined|Time- calculated by a stopwatch in seconds | |rotocoptor will be dropped from (always 2 metres) |by the rotocoptor itself and the paperclips | | |All four identical paperclips (same size, weight, type, |attached to it by a measuring scale in grams| | |mass, etc.) | | | |Surrounding (same area where experimented, air pressure, | | | |temperature) | | | |Same digital measuring scale will be used | | | |Same chair will be used when conducted all 25 trials. This|
Example: Cup 2 is made up of half stock solution and half tap water, which is a 50 percent relative salt concentration. m. What are the absolute salt concentrations of cups 1–4? (If you want to convert to metric units, 1 cup of salt is about 292 g, and 1 qt. of water is 0.946 liters [L].) Write these concentrations down in your lab notebook.
In this experiment we studied the motion of a vibrating spring. For the first part of the experiment we hooked a 50 g mass holder to the spring and recorded the total mass on the spring as the reference point 〖 M〗_0. The reference or equilibrium position, x_0, of the spring was then observed and measured to be 21.2 cm. The mass load was then increased by 10 g until the total mass load was 110g. I found that as the mass load was increased the displacement from the reference position increased.
In the large arterial branches, its velocity is 7 to 10 m/s; in the small arteries, it is 15 to 35 m/s. The pressure pulse is transmitted 15 times more rapidly than the blood flow. The term pulse is usually used incorrectly, to indicate the frequency of the heart beat, generally calculated in beats per minute. The pulse is a precise measure of heart rate. Under certain conditions, including arrhythmias, several of the heart beats are ineffective and the aorta is not stretched enough to create an obvious pressure wave.