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Compute the pH of a mixture of 0.25 M acetic acid CH3COOH and 0.1 M sodium acetate (CH3COO-NA+). The pKa of acetic acid is 4.76. Next, compute the pH of the same solution to which 3.5 ml of 6.05 M HCL has as well been added. Ignore the volume of the added HCL in your computation since its quantity is trivial. Utilize the Henderson-Hasselbalch equation to solve both of these problems.
What is the relationship between the following pairs of molecules. D-galactose and L-galactose. D-galactose and D-glucose
Consider a piece of gold jewelry that weighs 9.55 g and has a volume of 0.660 cm^3. The jewelry contains only gold and silver, which have densities of 19.3 {rm g}/{rm cm}^{3} and 10.5 {rm g}/{rm cm}^{3}, respectively.
Study Boyle's experiment, some nitrogen gas at 1 atmosphere pressure is intent in the left hand side of a J tube. When the column of mercury is extended by adding more to the right hand side, Define the original volume of the enclosed gas (100 mL)..
is believed to follow the mechanism H2O2 + I- ? H2O + IO- fast H2O2 + IO- ? H2O + O2 + I- slow At 25oC, the first step is fast relative to the second step. What is the rate law predicted by this mechanism?
calculate the approximate volume of a 0.600 mol sample of gas at 15.0 degrees Celcius and a pressure of 1.10 atm.
Predict the products of each of the following reactions. Assume that a reaction occurs in each case. write a balance equation for each one. Mg(s) + Zn(No3)2(aq) -->
To what temperature must a substance be heated so that its thermal energy is about 9 kJ/mol. Express your answer to the nearest degree.
Determine Ecell (in V) for a cell composed of a In electrode in a solution of In3+ coupled to a standard hydrogen electrode (SHE) under standard conditions.
an ice calorimeter can be used to determine the specific heat ofa metal. a piece of hot metal is dropped into a weighed
Why might this fire rekindle days later as someone tries to remove the residue with water? What chemical process is involved here?
Calculate ΔG° at 25°C for the redox rxn between Sn4+ and Fe that takes place in a voltaic cell if E°cell= 0.60V. The rxn is: Sn4+(aq) + Fe(s)→ Fe2+(aq) + Sn2+(aq)
Use the molar volume of a gas at STP to determine the volume (in {rm L}) occupied by 15.0 {rm g} of neon at STP.
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