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Catalysis refers to a chemical process in which the rate of a reaction is affected by the presence of a substance that is neither a reactant nor a product in the reaction
Explain possible reason for discrepency between the actual pH of the buffer and the reported pKa of the weak acid. (My case: actual pH =9.23, reported pKa =9.25)
Mercuric sulfide HgS is one of the least soluble salts known, with Ksp=1.6x10^-54 at 25 C. Calculate both the molar solubility and the solubility of HgS
Using electronegativity arguments, classify the following diatomic molecules as nonpolar (N), polar (P), or ionic (I). (Use the drop down menus to choose your answers
The initial temperature of the HCl and Ba(OH)2 solutions is the same at 20.48°C. For the process H+(aq) + OH-(aq) H2O(l), the heat of neutralization is -56.2 kJ/mol. What is the final temperature of the mixed solution?
What is the concentration of the vinegar in weight percent? (Assume a density of 1.030 g/mL.) If the pH of the vinegar was 3.44, what value is obtained for the Ka of acetic acid?
Consider the following equilibrium: Cu2+ + 4NH3 Cu(NH3)42+ (Kf = 4.8e+12) A solution is made by mixing 10.0 mL of 0.90 M CuSO4 and 1.50 L of 0.490 M NH3
Pure metals are commonly recovered from sulfide ores by successive processes of roasting in air (oxidation), dissolution in sulfuric acid and electrolysis (reduction). Consider the starting ore mineral sphalerite (ZnS). Write balanced chemical rea..
A soluble salt, AgNO3, with a common ion is added to a saturated solution of AgCl to give [Ag^+]=2.0x10^-2 M. what is the [Cl^-]? AgCl Ksp=1.8x10^-10
Write the electron configuration of the atom in the third row of the periodic table that has the smallest E_{{rm{i}}4}.
Draw the structure of the major organic product you would expect from the reaction of 1-bromopropane with NaCN.
During a balloon ascension, wearing an oxygen mask, you measure the weight of a calibrated 5.00-kg mass and find that the value of the gravitational field strength at your location is 9.785 N/kg.
The student adds 6 M NH3 to CuSO4 solution until the Cu 2+ ion is essentially all converted to Cu(NH3)4 2+ ion. The voltage of the cell goes up to 0.92 V and the Cu electrode is still negative. Find the residual concentration of Cu 2+ ion in the c..
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