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The mean activity coefficients for aqueous solutions of NaCl at 25C are given below. Confirm that an improved fit is obtained with the extended law
b (mmol/kg) 1.0 2.0 5.0 10.0 20.0
y+/ 0.9649 0.9519 0.9275 0.9024 0.8712
For which of the following would nitration (via Electrophilic aromatic substitution) occur in the ortho- and para- position?
What volume of a 35.0 mM solution of propionic acid is required to supply
Using pH-based arguments only, why do scientists use phosphate-based bufers instead of buffers made using acetic acid
In a reaction 8200 g of sodium reacts with 74.00 g of ferric oxide to form sodium oxide and iron metal. Calculate the mass of sodium iron produced.
Determine the molar concentration of the original acid solution and find pH and a % ionization of the acid in the original solution.
What is the molarity of a solution made by dissolving 74.8 g of strontium perchlorate in sufficient water
NH4Cl need to be added to 1.90L of a 0.400M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.55? Kb for ammonia is 1.8 x 10^-5.
show states of matter and charges where appropriate. Also find molecular equation, total Ionic Equation, and Net Ionic Equation.
An unknown mass of each of the given substances as with The final temperature is recorded as indicated 1.Pyrex glass (tf=67.6 C), 2.Sand (tf=70.4 C), 3.ethanol (tf=45.9 C), initially at 19.0 degrees celsius, absorbs 1930 Joules of heat
Calcutate the number of grams of drug to be wieghted for this solution
Calculate P,V and T for initial and final states of each process and produce a plot of the two processes on a P,V diagram. Without resorting to equations, explain why the result for part (b) is greater than or less than the result for part (a).
When 0.060 mol of propionic acid, C2H5CO2H, is dissolved in 500 ml of water, the equilibrium concentration of H3O+ ions is measured to be 2.41 x 10-3 M. What is Ka for this acid?
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