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Z- is a weak base. An aqueous solution of NaZ is prepared by dissolving 0.350 mol of NaZ in sufficient water to yield 1.0 L of solution. The pH of the solution was 8.93 at 25.0 °C
calculate the osmotic pressure in mm Hg of 6.00 L of an aqueous 0.889 m solution at 30.°c, if the solute concerned is totally ionized into three ions
Determine the pH at the equivalence (stoichiometric) point in the titration of 22.0 mL of 0.938 M HNO2 by 0.590 M LiOH. The Ka of HNO2 is 4.3 x 10-4.
Why are fluorescence measurements made at 90 degrees from the incident beam in most cases? 3. What is the ideal cuvette placement to avoid pre- and post-filter effects?
Oxalic acid is a diprotic acid that occurs naturally in some plants. Calculate the pH and the concentrations of all species present in a 0.36-M solution.
The drum will be operated at 1.25 psi and 70 F. Do you think a horizontal tank would be larger, smaller, or the same size?
Estimate the root mean square speed of air molecules striking the skin of a CHM315 student sitting in the class room at 8:15 am, assume that the room is at 27 degrees celcius
For the diprotic weak acid H2A, Ka1 = 3.2 × 10-5 and Ka2 = 7.9 × 10-7. What is the pH of a 0.0400 M solution of H2A? What are the equilibrium concentrations of H2A and A2- in this solution
A photon having E = 46.9 keV energy scatters from a free electron inside a metal. What is the maximum energy the electron can gain from the photon
A suspension of vanillin (2.5838 g, 16.98 mmol) and sodium hydroxide (0.022 g, 22 mL, 1M) was coolied in an ice-water bath before adding sodium borohydride (0.41s g, 10.89 mmol) while swirling the mixture. After addition of the sodium borohydride ..
Solve an equilibrium problem (using an ICE table) to calculate the pH of 0.12M HF, 0.12M NaF, and a mixture that is 0.12M HF and 0.12M NaF.
sample of fertilizer by the procedure of this experiment and obtain 1.000g of MgNH4PO4 * 6H20. Calculate the equivalent mass of P2O5 initially in the sample.
Consider the reaction of Al and Al+3 and Mg and Mg+2. Which is the cathode and which is the anode
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