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A student is asked to prepare a 1 L buffer by adding 0.11 M sodium acetate to 0.09 M acetic acid solution. What is the pH of the buffer? Ka for acetic acid is 1.8 x10 -5
4.690.414.834.749.20
The pH of a bicarbonate-carbonic acid buffer is 6.95. Calculate the ratio of the concentration of carbonic acid (H2CO3) to that of the bicarbonate ion (HCO3-)
The enthalpy of combustion of benzoic acid (C6H5COOH) is commonly used as the standard for calibrating constant-volume bomb calorimeters; its value has been accurately determined to be 3226.7 kj?mol.
If the reaction 4NH3 + 5O2 yeilds 4NO + 6H2O uses 824 g NH3 and excess oxygen, how many moles of NO are formed?
calculate the total length obtained when you add 12.3cm, 2.75dm, and 0.450m. give the answer in centimeters
Expalin how you would prepare 500.0mL of a solution that is 0.100 M of H2SO4 from concentrated 18.0 M of H2SO4, which is a liquid with density 1.82g/mL
At what temperature (celsius) will the rate constant for the reaction be 140.0 s-1? Use the conversion Kelvin = C + 273.15
what is the minimum amount of NaCl needed to get the 18.2 degrees? Its a molality equation
You wish to prepare an HC2H3O2 buffer with a pH of 5.44. If the pKa of this is 4.74, what ratio of C2H3O2-/HC2H3O2 must you use. Calculate the pH of a buffer that is 0.058 M HF and 0.058 M LiF.
All of the following are balanced equations. State the number of atoms of each element in the reactant and in the products. a) 2N2(g)+3O2(g)--->2N2O3(g); b)Al2O3(s)+6HCl(aq)--->2AlCl3(aq)+3H2O(l); c) C5H12(l)+8O2(g)--->5CO2(g)+6H2O(g).
Calculate so for cooling 1.00 mol of Ne from 298K to 253K under constant volume conditions using the Sakur-Tetrode equation
to what celsius temperature must 63.0 ml of methane gas at 86.0degc be changed so the volume will be 50.0 ml? assume
When drawing a Lewis structure, how do I know which atom serves as the central atom in a Lewis structure
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