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Consider a mixture of salt NaA and weak acid HA. Please derive the pH Henderson Hasselback equation by writing the equilibrium expression. Define the pKa. Hint: What is a buffer? Another hint: what happens when you add strong acid or base to a buffer solution? NaA(s) ---> Na+ (aq) + A-(aq) HA(aq) <---> H+ + A-(aq)
How many mL of 0.145 M NaOH solution will be required to neutralize 5.00 mL of a 0.829 M HCl solution
A biochemical engineer isolates a bacterial gene fragment and dissolves a 10mg sample in enough water to make 30ml of solution. the osmotic pressure of the solution is .340 torr at 25 degrees C. the molar mass of the gene fragment is 1.81x10^4 g/m..
Dehydration upon heating with concentrated sulphuric acid without carbocation rearrangement?
KOH was used to titrate 25.0ml of HF. How many moles of KOH were used? How many moles of acid were titrated? What is the concentration of the HF?
at 30 km above the earths surface (roughly in the middle of the statosphere) the pressure is roughly 0.013 atm and the gas density is 3.74 x 10^23 molecules/m^3 assuming N2 is represetative of the stratosphere using the collisional diameter inform..
determine the rate law and rate constant for the gas-phase reaction of nitrogen monoxide and chlorine.
A sample contained a mixture of CdS and ZnS. The amount of CdS was determined by reacting 5.903 g of the sample with an excess of HCl to release H2S from each compound
Write the reaction under study and explain why menthone is a good target molecule of the peppermint oil.
A sample of .755g of NaHCO3 was dissolved in 25mL of .960 M HCl. After heating, 6.7 mL of .601 M NaOH was needed to neutralize the excess acid that was not neautralized
Use stereoformulas to show that (S)-benzoin reduces to meso-hydrobenzoin.
The half-cell is a chamber in the voltaic cell where one half-cell is the site of an oxidation reaction and the other half-cell is the site of a reduction reaction.
An automobile has a wavelength that is not measurable by human standards. If the car has a mass of 4000 lbs (1.81 x 103 kg) and travels at 60 miles/hr (26.8 m/s), calculate the wavelength of the car.
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