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The dilution of the buffer should not change the pH of the buffer by very much. Explain why not.
A chemist must dilute of M aqueous potassium iodide solution until the concentration falls to M . He'll do this by adding distilled water to the solution until it reaches a certain final volume.
two naturally occurring isotopes, Re-185 (mass = 184.935 amu) and Re-187 (mass = 186.956 amu). Calculate the percent abundances of the isotopes of rhenium.
A solution contains three anions at the folowing concentrations: .20M CrO4^2-, .10M CO3^2-, and .010MCl^-. if a dilut solution of AgNo3 is added to the solution
An electrical heater delivers 7.880 kJ of energy (as heat) to a system consisting of the gas inside a cylinder having a movable piston. As a result, the piston moves against a constant external pressure such
the concentration of a sodium hydroxide solution is determined by titrating it against a sample of potassium hydrogen
Consider the reaction: 2N2O(g) O2(g) + 2N2(g). Which of the following will cause a shift in the equilibrium to the right? 1. Add more N2O 2. Remove O2 3. Remove N2
a 8.0-l sample of helium is held at constant pressure. if the temperature is changed from 41 degrees c to 35 degrees c
Calculate the pH during the titration of 21.7 mL of 0.451 M KOH with 0.212 M HBr after 18.3 mL of the acid have been added.
Calculate Delta mixG, Delta mixS, and Delta mixH for mixing 150.0 g of benzene with 200.0 g of toluene at 20 degree C and 1 atm.
For a solution of 0.10M H3PO4, calculate the concentration of all the ionic species in solution (i.e., H+, OH-, H2PO4-, HPO42-, PO43-)
2I2 + N2H4 4HI + N2 a.How many grams of I2 are needed to react with 36.7 g of N2H4?
Calculate the mass (include units) of the unknown sample to produce 250 mL of a solution at about [Ca2+] = 0.005 M. Assume that the weight percent of CaCO3 in the unknown is 50%
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