This helped us realize that a drippy faucet was an accurate clock. Lastly, we created sundials by tracing a protractor and then marking off intervals of 15 degrees, which were the time intervals starting with 6AM on the left side and ending with 6PM on the right. Then we stuck the screw through the paper in the middle of the bottom straight line. Thursday in lab, we first found the spring constant of our spring hooked onto our stand by timing the period it took for a 50g weight to oscillate back and forth. We timed the oscillation ten time and then found the average which was .77 seconds.
After measuring the amount of water needed (50 mL), put the beaker of water back into the freezer to maintain its temperature. Pour 50 mL of cold water into one detached chamber. Place the chamber with water and the chamber without water on a table side by side. Place the connected choice chambers with 5 sowbugs in the right and left* chambers on top of the separate chambers (one with 10 degree celsius water and one without water), adjust the pairs of chambers so the attached chambers are directly on top of the separated chambers. Every 30 seconds count and write the amount sowbugs in each chamber (from 30 seconds to five minutes).
In this experiment I set up a lab that examined how 5 different concentrations of HCL (each concentration differing by 5ml of HCL) reacted with CaCO3 and performed three trials for each concentration of HCL, I then found then average of the results and used the averages to form an accurate graph comparing the rate of reaction for each concentration of HCL when mixed with CaCO3 chips. In this experiment I placed 5g of CaCO3 chips in a conical flask and then mixed the different concentrations of HCL with the calcium carbonate. As soon as all of the acid was poured in I attached a delivery tube to the conical flask and watched the CO2 form in upside down graduated cylinder (see diagram). The reaction observed
Before getting the goldfish subjects, two beakers were filled with 200 ml fish water and weighed. Four goldfish were then collected gently from the fish tank and each two of them were transferred into one beaker. Each beaker along with fish and water was weighed again to determine the weight of each pair of goldfish. For the control group of each trial, the oxygen chamber was firstly filled with 200 ml fish water; after two goldfish along with 200 ml water were transferred into it, it was sealed in order to prevent oxygen exchange with the ambient environment. The built-in probe in the chamber measured the dissolved oxygen concentration in the chamber’s water (mg/L), which could reflect the oxygen consumption rate of goldfish.
Once we read, we then obtained the materials needed, which were an electrical balance, a nickel, golf ball, pencil, rock, an empty 100 ml beaker and a 100-ml beaker containing 50 ml of water. After obtaining our materials, we turned on the balance and set it to weigh in grams. Then, we "zeroed" the balance and began placing each object on the balance. While placing each object on the balance, our lab partner, Sandra recorded the weights. Eventually, we finishing weighing each object, recording their weights and then we began converting the recorded measurements to the English system and calculating the density.
4) Use a 25 cm3 graduated cylinder for the initial measurements of each solution. Pour 20 cm3 of 0.5M FeCl3 and 20 cm3 of 0.5M KSCN in separate graduated cylinders. 5) Using a 10 cm3 graduated cylinder, pour the necessary volume of distilled water, in this case 5 cm3. After pouring the distilled water to the graduated cylinder containing the FeCl3. 6) Next, prepare a 50 cm3 beaker, and pour both reactants into it.
Then five millilitres of sample “A” were placed in the test tube labeled “A”. This was then repeated with the next three samples. Each sample was visually observed and the colour of each was recorded. Next 20 drops of Benedict’s solution were added to each test tube and the test tubes were lowered into a hot bath at a temperature of approximately 80 degrees Celsius. All colour changes were recorded.
To find the volume of the quarter shaped tank you would have to use the volume of the sphere using the equation V=4/3(3.14)r^3. You would substitute the radius of 70 feet into the equation, V=4/3(3.14)(70*70*70). You would multiply the radius 3 times since it's the radius cubed. Once you use a calculator to solve it and you get the answer 1,436,026.67 feet. That's just the volume of the quarter tank so the find the volume of the main tank you would divide 1,436,026.67 by 4
We then calculated the amount of salt to put in each dish. To do this we created proportions. We calculated that we need to put .25 mL of salt in 50 mL of water to create .5% salinity, 1.5 mL of salt in 50 mL of water to create 3% salinity, and 2.5 mL of salt
Eventually using the NaOH and the acid’s consumed moles, the equivalent mass will be determined. Procedure: Part 2: Obtain 45mL of NaOH, and then weigh 0.3-0.4g of the unknown acid (KH2PO4). Dissolve the acid into 20.00mL water. Record the buret readings, and slowly titrate the NaOH into