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A silver nitrate primary standard for a gravimetric titration of chloride was prepared by dissolving 4.872 ± 0.003 g AgNO3 (FM 169.8731) in 498.633 ± 0.003 g H2O. Then 26.207 ± 0.003 g of the solution were weighed out for titration. Find the moles of Ag+ ( and its relative uncertainty) delivered for titration. The relative uncertainty in formula mass is negligible.
The activity of an isolated sample of gas obtained from a basement containing radon-222 was found to be 8 pCi/L. This isotope has a half-life of 3.8 days. If no additional radon-222 entered the sample, how long would it take for the activity to de..
A solution contains .229 M sodium acetate and .157 M acetic acid. What is the pH of this solution. How is Ka calculated
what is the chemical equation name and formula for the follwing?when strongly heated magnesium sulfide formed a yellow
A container of gas with an adjustable volume has an initial pressure of p. The container volume is tripled at constant temperature. What is the pressure inside the container after the volume is increased
you are given 2.56 g of salicylic acid. using the procedure in the lab manual for the synthesis of aspirin you recover
Calculate the hydronium concentration for a solution prepared by dissolving 0.15 mol of benzoic acid (C6H5COOH) and 0.30 mol of sodium benzoate (C6H5COONa) in 1.00 L of solution. (Ka of C6H5COOH = 6.5 x 10-5)
Its volume in the liquid state is 1.00 cm3 and its volume in the vapour state is 1671 cm3. Find the work done by expansion due to evaporation and the change of internal energy of the system.
Determine the Keq for the reaction of benzoic acid with 4-nitroaniline.
What is the molarity of a solution made by dissolving 8.56 g of sodium acetate in water and diluting to 750mL?the answer is .139, but how
The combustion of an organic compound releases 35.6 kJ of energy and causes the temperature of a constant volume calorimeter to increase by 4.76 °C .
How many milliliters of ammonium sulfate solution having a concentration of 0.411 M are needed to react completely with 61.4 mL of 1.24 M sodium hydroxide solution. The net ionic equation for the reaction is
When CuCl2 is heated to 100C, the compound is dehydrated. If 0.235g of CuCl2 * x H20 yields 0.185 g CuCl2 on heating, what is the exact formula of the hydrate
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