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A buffer solution contains 0.1 M CH3COOH and 0.1 M sodium acetate (that is, it has 0.2 M total buffering components of acetic acid + acetate). Calculate the pH after addition of 4 mL of 0.025 M HCl to 10 mL of the buffer. The pKa for acetic acid is 4.74.
Consider a perfect gas with Cvm = 28.0 J/mol-K trapped in a piston/cylinder arrangement with cross-section area of 250.0 cm^2. The gas expands irreversibly against a fixed external pressure of 1.0 atm adiabatically
If 352 g of magnesium reacts with excess oxygen to produce 296 g of magnesium oxide, what is the percent yield for the reaction?
An excess of NaOH is treated with 1.1L of dry HCl gas (measured at STP). What is the weight of NaCl formed?
Describe the preparation of 1.50 L of a solution that is 12.0 ppm in K+, starting with solid K4Fe(CN)6.
Find the expected freezing point of a water solution that contains 268 g of aluminum nitrate, Al(NO3)3, in 8.50 kg of water.
What is the enthalpy of formation of CO(g) in kJ. 2CO(g) + O2(g) --> 2CO2(g). ?H reaction = -566 kJ ; ?H CO2(g) =-393.5 kJ/mol.
Elemental phosphorus reacts with chlorine gas according to the equation: P4 (s)+ 6Cl2 (g) --> 4PCl3 (l) A reaction mixture initially contains 45.11 g P4 and 132.0g Cl2. Once the reaction has occurred as completely as possible, what mass (in g) of ..
Calculate the values of E for the cell when the following volumes of the ce4+ titrant hav been added:(Activity coefficients may be ignored as they tend to cancel when calculating concentration ratios). 1.50 ml 20.0 ml 39.0 ml 40.0 ml 44.0 ml 80.0 ..
The mass of a cube of iron is 292 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions.
How many grams of aluminum metal and how many liters of chlorine gas can be produced by passage of 4.8 amp of current for 2.3 hours under standard conditions
a voltaic cell consists of mnmn2 and cdcd2 half-cells containing equal volumes of solutions with the following initial
Calculate the pKa of the second ionizable group of Z.
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