As the LabQuest was plotting the graph and the volume of NaOH was increasing as it was added to the HCl solution, it was discovered that the LabQuest malfunctioned and stopped at the pH of two. The pipette was then turned off again and the TA was then notified in which it was then fixed.…
1. Clean, rinse, and fill a buret with NaOH solution just as you did in last week's experiment. Record the molarity of the NaOH and the initial NaOH volume reading from the buret (+0.02 mL).…
This buffering ability is achieved via the equilibrium between the acid and its conjugated base in the reaction.…
Once divided by two, that value ended up being 6.815 milliliters of NaOH added at the ½ equivalence point pH. In order to estimate the pH at that volume of NaOH being added, two data points around the volume of 6.815 milliliters were…
Observations: The hottest temperature reached was Zinc at 34.8°C & Copper was the heaviest metal…
Class average for a 80 and 120 drop count was recorded to be 0.041+/- 0.005 mL/drop. If a graduated cylinder is not available there is another way of adding more of the solution. The disposable pipet can transfer 0.5mL of the solution to the chemical reaction. When comparing a 10mL graduated cylinder, a 100mL beaker, and a 50mL graduated cylinder, the most precision peace of glass wear would be the 10 mL graduated cylinder with the true volume of water (calculated), class average, and uncertainties being 9.7896 +/- 0.05mL. The 50mL graduated cylinder comes in second place with a true volume of water(calculated), class average, and uncertainties being 50.0001 +/- 0.22mL. The third peace of glassware coming in as the least accurate would be the 100 mL beaker with a true volume of water(calculated), class average, and uncertainties being 59.9999 +/- 0.82mL.…
In order to describe the molar volume of pure water the equation V_3=M_3⁄ρ_(3 ) is used, whereas those of sodium nitrate and the polyether compound poly(ethylene glycol) (PEG) are shown by V_1=V_(∅_1)^∞and V_1= V_(∅_2)^∞. In these two equations, V_(∅_1)^∞ and V_(∅_2)^∞ which are the apparent molar volumes at infinite dilution of sodium nitrate and poly(ethylene glycol), must be computed on the basis of data on apparent molal volume (V_∅). The following equation shows the relation of the V_∅ of a binary solution with density, Equation 1…
Add 50 milliliters of the solution you want to test to the beaker and record its mass. The mass of the solution is equal to the total mass minus the mass of the beaker.…
Before You Begin: You may either copy and paste this document into a word processing program of your choice or print this page.…
In the first process of the lab, you measure the mass of water transferred from a buret to a beaker, to determine the experimental mass of the water, and the volume of the water collected. We measured the temperature of the water so we could calculate the density of the water, which enabled us to calculate the actual volume of water, by using the density and the measured volume of water. To determine the percent error, we had to subtract the actual volume of water by the experimental volume of water transferred from the buret to the beaker, and then divided it by the actual volume and multiplied it by 100. In the second process, you perform the same steps you did for the buret, but instead, you use a 5.00mL or 10.00mL pipet. You repeated each…
Once this amount is known, you can use the equation you have written in Question 1 to…
What mass of nitric oxide, NO, is present in a 2.5 L flask at a pressure of 100 kPa and 0ºC?…
I believe that alcoholic compounds with bigger relative formula mass will release more energy in combustion reaction than the less alcoholic hydrocarbons compounds.…
Purpose: How many calories are in a peanut? How does it compare to other nuts?…
The purpose of the second week experiment was to examine the effects of changing the pH…