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Estimate the mass of potassium hydrogen phthalate (KHP) that will require 25 ml of 0.10 M NaOH to reach the equivalence point in a titration.
what is the change in ph after addition of 10.0 ml of 1.0 sodium hydroxide to 90.0 ml of a 1.0 m nh31.0 m nh4 buffer?
calculate the mass of nitrogen dissolved at room temperature in an 80.0 rm l home aquarium. assume a total pressure of
A mixture of CS2 (g) and excess O2 (g) is placed in a 10.0 L reaction vessel at 100.0 degrees C and the pressure of 3.00 atm, A spark causes the CS2 to ignite, burning it completely, according to the equation:
Based on activation energies and energy changes and assuming that all collision factors are the same, answer the following questions- Which of the following reactions would be fastest in the forward direction
The stabilization of a half-filled of shell is even more pronounced than that of the p subshell. Why
There are three isomeric dichlorocyclopropanes. Their 1H NMR spectra show one signal for isomer 1, two signals for isomer 2, and three signals for isomer
Calculate the pH of a solution that is .15 M Na2HPO4(aq) and .44 M Na3PO4(aq). Not sure how to solve it. The ka1 of H3PO4 is 7.6 x 10^-3, pKa1 is 2.12, ka2 is 6.2 x 10^-8, pka2 is 7.21, ka3 is 2.1 x 10^-13, pka3 is 12.68.
If the H+ ion concentration in an aqueous solution at 25.0 °C is measured as 6.6 x 10-4 M, then the pH is 1) 3.00 2) 3.18 3) 6.60 4) 9.55 5) 10.82
Calculate the lattice energy of Na2O for the following data: Ionization energy of Na(g):::495kj/mol, Electron affenity of O(g) for 2e-:::603 kj/mol
20 g of compound is dissolved in 400 mL of water. A single extraction with 100 mL of diethyl ether was performed, after which ethereal phase contained 10 g of compound. Calculate the partition coefficient.
At 850K the value of the equilibrium constant K(pressure) is 0.2970. If a sealed vessel contains an initial reaction mixture of [N2] = 0.0150M, [H2]= 0.0200M and N2H2= 0.000100M what will [N2H2] be when equilibrium in reached.
Two solid forms of elemental sulfur (S8) are rhombic and monoclinic, denoted A and B, respectively. For the transformation S8(s,A) --> S8(s,B), dH* = 330 J/mol and dS* = 80 J/mol*K.
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