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The method of initial rates involves substituting the initial reactant concentrations into rate calculations. When you do the experiment, you will be given KMNO4 and H2C2O4 solutions of know concent
Calculate the molar concentration of H+ ions in a solution made by diluting 25 mL of 0.1 M HNO3(aq) to 500 mL with pure water.
Question: A solution is prepared by diluting 25.00 ml of a .308 M solution of NiCl2 to a final volume of 0.500 L. What are the concentrations of the invidual ions Ni and Cl in this solutions?
A 158.5 mg sample of pure Cu metal is dissolved in a small amount of concentrated nitric acid giving Cu2+ ions in a solution. It is then diluted to a final volume of 1.00 L. What is the molar concentr
At 25 C, the rate constant is 3.0 x 10^-4/M sec. Calculate the rate at this temperature if (NH4+)=0.26 M & (NO2-)=0.080 M
Calculate the pH after the following volumes of titrant has been added: 0.0 mL, 10.0 mL, 20.0mL, 35.0mL, 36.0mL, 37.0mL. Determine the K value for the reaction of NH3 with the HCl.
The compound MgI2 times XH2O is analyzed to determine the value of X. A 1.557-g sample of the compound is heated to remove all the water, 1.0254 g of MgI2 remains after heating. What is the value of
Question: What mass of copper would you expect to be deposited from a copper (II) sulphate solution using a current of 0.50 A over 10 seconds?
Density of the solution is 1.05 g/mol. What is its molarity of the solution? molailty of the solution? and mass percent of the solution?
Question: Substances A and B are the same mass and at the same initial temperature. When they are heated, the final temperature of A is 55 degree C higher than the temperature of B. What does this
Calcium carbonate, or limestone, is relatively insoluble in water. At 25?C, only 5.8 mg will dissolve in 1.0 liter of water. What volume of water is needed to dissolve 5.0 g of calcium carbonate?
Graphite and Diamond are both made from carbon atoms. List some of the physical characteristics of each.
Why is it not possible to convert bromobenzene to benzoic acid by the nitrile method and how could this conversion be accomplished?
The same mass of solute is dissolved in 9.82 g of t-butanol instead of cyclohexane. What is the expected freezing pt. change of this solution?
Silver has two stable isotopes with masses of 106.90509 amu and 108.9047 amu. The average molar mass of silver is 107.868 amu. What is the percent abundance of each isotope?
Name a metal that could be used in a future experiment to extract the copper from the copper (II) nitrate solution.
State the order with respect to each reactant and the overall order of the reaction for the following rate expressions:
Gallium has an average atomic mass of 69.7 amu. In a typical sample, 60.4% of Ga exists as Ga-69 (68.9257 amu). What is the identity and the atomic mass of the other isotope?
Calculate the final temperature (once the ice has melted) of a mixture made up initially of 75.0 ml liquid water at 29.0 degrees C and 7.0 g ice at 0.0 degrees C.
In what type of material is the energy gap between the valence and the conduction band the greatest? Na, Ge or diamond. Draw a rough energy band showing the valence and conduction bands in these mat
You have a kanamycin stock of 100mgs/ml. How much Kan do you need to add to the 1 liter of LB culture to have a concentration of 30micrograms/ml?
Calculate the work done (in J) on the surrounding atmosphere (1atm pressure, 25.8 oC) by the evolution of hydrogen in the subsequent reaction. State any assumptions you have made?
Calculate the mass of C2H6O2 that must be added to 1.00 kg of ethanol, C2H5OH,to reduce its vapor pressure by 13.2 torr at 35 degree celsius. The vapor pressure of pure ethanol at 35 degree celsius
We can calculate Kb for the carbonate ion if we know the Ka values of carbonic acid(H2CO3). Is Ka1 or Ka2 of carbonic acid used to calculate Kb for the carbonate ion? Explain.
When 5mls of 0.05M CH3COOH is allowed to react with 1.5mls of 0.05M KOH. The pH is found to be 4.43.Using the Henderson-Hasselback equation, calculate the pKa and thus the Ka of ethanoic acid.