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The solutions at the two Pb electrodes of a concentration cell were prepared as follows: Cell A: A mixture of 1.00 mL of 0.0500 M Pb(NO3)2 with 4.00 mL of 0.0500 M KX (the soluble potassium salt of an unspecified monovalent ion X-). Some PbX2(s) precipitates. Cell B: 5.00 mL of 0.0500 M Pb(NO3)2. The cell potential was measured to be 0.06800 V at 25 °C. By use of the Nernst equation, determine the concentration (M) of Pb2+ in the solution of Cell A.
Calculate the sodium ion concentration when 72.7 mL of 4.0 M sodium carbonate is added to 33.2 mL of 1.8 M sodium bicarbonate.
Urea { (NH2)CO } is used for fertilizer supplyingnitrogen to the soil. Calculate the number of N atoms foundin 1.68 * 10^4g of urea.
Compare the pH vs volume curve for HCL and acetic acid. discuss any difference in the shape of the curves. Compare theese two curves to one of the curves prepared for the unknow
the calorimeter above that contains 20.00g of water at 23.15 degrees C, what will the final temp of the calorimeter be when the reaction gose to completion
a zero-order reaction has a constant rate of 3.50times10-4 mrm s. if after 65.0 seconds the concentration has dropped
A soln. of HCl has a specific gravity of 1.120 and contains 23.81% HCl by wt. How many grams and how many milliequivalents of HCl are present in each milliliter of the soln.?
Assuming the mixture has the same specific heat (4.184J/goC) and density (1.00 g/cm3) as water, calculate the heat (in J) transferred to the surroundings, qsurr.
Mercury, with a freezing point of -38.8 degrees Celsius, is the only metal that is liquid at room temperature. How much heat energy must be removed from 1.00 mL of mercury at 23.0 degrees Celsius to produce solid mercury?
The reaction between hydrochloric acid and zinc metal produces hydrogen gas and zinc chloride. If 50g of each hydrochloric acid and zinc are mixed
Identify each of the following energy exchanges as primarily heat or work and determine whether the sign of is positive or negative for the system. A rolling billiard ball collides with another billiard ball
In an oxidation-reduction reaction, it required 25.6 ml of a 0.65 M potassium permanganate solution to reach the equivalence point with 15.0 mL of an iron(II) sulfate solution.
Calculate the pH for the following case in the titration of 50.0 mL of 0.140 M HClO(aq) with 0.140 M KOH(aq).HClO is a weak acid with a Ka
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