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A beaker with 195mL of an acetic acid buffer with a pH of 5.000 is sitting on a bench. The total molarity of the acid and conjugate base in this buffer is 0.100M. A student adds 4.90mL of a 0.420M HCl solution to the beaker. How much will the pH change? (pKa of acetic acid is 4.760).
elemental sulphur occurs in the solid state as 8-membered rings arranged in rhombohedral crystal structure s8 which
At what pH will precipitation of Al(OH)3 begin if 5.40 lb of aluminum sulfate, Al2(SO4)3, is added to 1150 gallons of water (with a negligible change in volume)
A container is filled with an ideal gas to a pressure of 40.0 atm at 0 degrees C. a. What will be the pressure in the container if it is heated to 45 degrees C?
An element forms a body-centered cubic crystalline substance. the edge length of the unit cell is 287pm and the density of the crystal is 97.92 g/mL. calculate the molar mass of the substance.
When the atmospheric pressure is 1050 , what is the absolute pressure (in ) in the tank if the height of the mercury in the open tube is 25.0 higher than the mercury in the tube connected to the tank
What is the driving force for losing a proton as the last step in electrophilic aromatic substitution
How many mL of .200 M FeCl3 are needed to react with an excess of Na2S to produce 2.75 g of Fe2S3 if the percent yield for the reaction is 65%? 3Na2S + 2FeCl3 = Fe2S3 + 6NaCl
For which of the following species is resonance an important property: HONO, HONO2, N3-, NO2-, NO2
This results in the formation of the highly colored FeSCN2+ complex ion. To do this analysis, a standard solution containing 5.00x10^-5 M Fe3+ was prepared. After addition of excess SCN-, the absorption of the standard solution =0.363 at 580 nm.
A football is inflated to a pressure of 1.00 x 10^3 torr in a room at 25 degrees C. If the game is played at 10 degrees C, what will the pressure in the ball be, neglecting any volume change in the ball and assuming that it doesn't leak?
What is the molecular formula and structure? Also what does its infrared spectrum and NMR spectrum show?
Determine how you would make a 100ppb solution of riboflavin from a 50mg/L stock solution. Do the same for preparation of a 500ppb solution from a 50mg/L stock solution
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