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Explain how many moles of HF (Ka=6.8x10-4) should be added to water to form 0.230L of solution with a pH of 3.50?
Compare the rate at which pH changes when HCl is added to the buffer solution the the rate of change when no buffer or base is present (distilled water).
Calculate the pH of the solution which results from adding 38.54 mL of 0.1012 M KOH to the cyanic acid/cyanate buffer of the previous problem(*). You must show appropriate chemical equations for full credit.
Compute the mass of solute and water needed to prepare the following solutions: 1. 150 g of 1.00 m (NH4)2SO4: (a) from pure solid (NH4)2SO4 (b) from solid (NH4)2SO4 with a purity of 87.2 wt-% 2. 1.50 L of a 20 wt-% Pb(NO3)2 solution whose density ..
Write the standard line notation for each cell below. Assume all concentrations are 1.0 M and all partial pressures are 1.0 atm. IO3-(aq) + Fe2+(aq) --> Fe3+(aq) + I2(aq)
What volumes of .50 M HNO2 and .50 M NaNO2 must be mixed to prepare 1.00 L of a solution buffered at pH= 3.55? Calculate the pH of solution formed by mixing 100 mL of .100 M NaF and 100 mL of .025 M HCl.
Which one of the following pairs is a conjugate acid-base pair?
What volume will it occupy at each of the following temperatures if the pressure and number of moles are constant
Assuming the density of a 5% acetic acid solution is 1.0 g/ml, determine the volume of the acetic acid solution necessary to neutralize 25.0 ml of .10M NaOH. Also record this calculation on your report sheet.
Ethylene epoxide (C2H4O) decomposes to form CH4 and CO. Small quantities of H2 and C3H6O are also formed. The following reaction mechanism has been proposed:
How many liters of softened water, containing a sodium concentration of 4.0×10-2% sodium by mass, have to be consumed to exceed the FDA recommendation
a 50.0 g sample of water is cooled from 30 degrees Celsius to 15 degrees Celsius losing 3140 J of heat What is the change in enthalpy.
Calculate the % atom economy for the following two methods for converting benzene, C6H6, to aniline, C6H5NH2.
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