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A quantity of 200.0 mL of 0.862 M HCl is mixed with 200.0 mL of 0.431 M Ba(OH)2 in a coffee-cup calorimeter (Hint: write and balance the chemical equation for this neutralization process). The initial temperature of HCl and Ba(OH)2 is the same at 20.48 ºC. The final temperature of the reaction mixture is 26.30 ºC. Assume the specific heat of the solution is the same as that of water and the density of the solution is 1.00 g/mL. Calculate the heat of neutralization (i.e., ?Hreaction per mole) for the process
H+ (aq) + OH- (aq) à H2O (l)
Equal molar aqueous solutions of the chloride salts of the following metals in their highest oxidation states where prepared and their respective pH's measured. which is the correct order
You are asked to prepare a buffer with a pH of 9.8. Calculate the volumes of .1 M solutions of NH4Cl and NH3 needed to produce 200mL of the buffer
If the concentration of EDTA in the blood of the patient is 2.60x10^-8 M and the formation constant for the complex, {Pb(EDTA)}2- is 2.00x10^18, what is the concentration ratio of the free (and potentially toxic) Pb2+(aq) in the blood to the much ..
A student standardized her I2 solution by preparing a solution of 0.0450 g of ascorbic acid (vitamin C) in a 100 mL volumetric flask. She titrated several 10.00 mL samples of the Vitamin C solution and found an average of 24.95 mL of I2 solution
what is the pressure of a container that has 7 atm pressure coming from o2 2 atm of pressure coming from n2 3 atm of
If the theoretical yield for a reaction was 156 grams and I actually made 122 grams of the product, what is my percent yield
Which one of the following actions will cause an increase in the equilibrium concentration of NO(g) in a closed reaction chamber?
Determine the standard enthalpy change of the following explosive reaction by using the apprpriate enthalpies of formation
at 700° C is 0.76 atm. Determine the initial pressure of carbon tetrachloride that will produce a total equilibrium pressure of 1.2 atm at 700° C.
a 265- flask contains pure helium at a pressure of 761 . a second flask with a volume of 490 contains pure argon at a
How many mL of a 45.0%(m/v) solution of NaCl would you need in order to have 12.0g of NaCl? Molar mass of NaCl is 58.54g/molhow many mL of a 45.0%(m/v) solution of NaCl would you need in order to have 12.0g of NaCl
Calculate the kinetic energy in joules of a 1400kg automobile moving at 12m/s. Convert this energy to calories. What happens to this energy when the automobile brakes to a stop
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