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You are asked to determine the Calcium content of a sample (1.0 0g). You dissolve this sample in 12 M HCl then diluted it with DI water to 100.0 mL. You take 10 mL sample solution and titrate it with EDTA (0.0500M ; 15 mL in addition to the blank solution of Mg2+).
a. How many moles of CaCO3 (MM = 100.1 g/mole) can be in this sample if it is pure CaCO3?
b. What is the % CaCO3 in this sample?
c. What is the color of the indicator of Eriochrme Black T used in this experiment and briefly describe how it works?
A 300mL water sample has an initial pH of 10. 40mL of 0.02 N H2SO4 were required to titrate the water sample to pH 4.5. What is the total alkalinity of water in mg/L as CaCO3
If a stream of N2O is passed through a tube 30mm in diameter and 25cm long at a flow rate of 0.7L/min, at what temperature should the tube be maintained to have a partial pressure of 1.0mm of O2 in the exit gas? Assume that the total pressure of t..
As early as 1938, the use of NaOH was suggested as a means of removing CO2 from the cabin of a spacecraft according to the following (unbalanced) reaction: NaOH + CO2 → Na2CO3 + H2O.
You transfer a sample of a gas at 17*C from a volume of 5.67L and 1.10atm to a container at 37*C that has a pressure of 1.10atm. what is the new volume of the gas?
A certain atom is bombarded with a neutron and changes into Lithium 7. What was that atom? (It is a fission reaction)
The PH of a solution prepared by dissolving 0.30 mole of the weak acid, HA, in enough water to make 1 liter of solution is 6.1. Calculate the Ka and the percent ionization of the HA solution.
Carbonyl fluoride, COF2, is an important intermediate used in the production of fluorine-containing compounds. For instance, it is used to make the refrigerant carbon tetrafluoride, CF4 via the reaction
Draw the structure of the product likely to be obtained from the reaction between acetoacetic ester, bromobenzen & 2 molor equivalents
The resulting solution is titrated to a starch endpoint with 34.81 mL of the thiosulfate solution. Calculate the concentration of the thiosulfate solution.
A reaction mixture initially contains 1.6 L of A and 1.8 L of B. Assuming that the volume and temperature remain constant, what is the percent change in pressure if the reaction goes to completion?
Can someone explain the following subjects in a little detail. Enthalpy of formation. Kp and Kc and finding like the mass of a substance when you're given Kp and equilibrium and volume temperature etc. Also a summary of ICE tables.
The initial temp of the calorimeter is 21.5 degrees celcius. the H2o is initially 98.1 degrees celcius and final temp of both the H2o and calorimeter is 39.2. Calculate the heat capacity in units of J/c. Use 4.184 j/g for specific heat of water
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