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Part 1.
A buffer solution contains 0.318 M NaH2PO4 and 0.241 M Na2HPO4. Determine the pH change when 0.080 mol NaOH is added to 1.00 L of the buffer.
pH after addition - pH before addition = pH change = ________
Part 2.
A buffer solution contains 0.375 M C6H5NH3Br and 0.372 M C6H5NH2 (aniline). Determine the pH change when 0.090 mol NaOH is added to 1.00 L of the buffer.
pH after addition - pH before addition = pH change = _______
What is methanol's vapor pressure It boils at 65.0 °C and has a heat of vaporization ΔHvap = 37.4 kJ/mol. at 22.0 °C?
If 450g of acetone is reacted with 650g of benzaldehyde and it yields 350g of the product what is the percent yield? Show your calculations.
If this energy were used to vaporize water at 100 C , how many grams of water could be vaporized. The heat of vaporization of water at 100 C is 40.7 kJ/mole
Calculate the de Broglie wavelength of a Helium atom moving at a speed of 244.0 m/s.
Estimate the equilibrium constant for the weak base C6H5CH2NH2, if a 4.53×10-1 M aqueous solution of C6H5CH2NH2 has a pOH 4.84 (make an exact calculation assuming that initial concentration
another part says spectra of caffeine, benzoic acid, and a mountain dew sample in 0.10 M HCl. On a graph it has the points 8.74 mg/L for benzoic acid, 1.5 dilution for mountain dew soda,
Calculate the pH at the equivalence point if 25.00 mL of 0.010 M barbituric acid (HC4H3N2O3) is titrated with 0.20 M NaOH. (Ka barbituric acid = 1.0 x 10^-5).
After the reaction was complete, the solid residue, consisting of KNO2 and the original impurities, had a mass of 24.1 g. Assuming that only the potassium nitrate had decomposed, how many grams of KNO3 were present in the original sample? Answer i..
Many drugs are high-molecular-weight amines that are weak bases. Such amines are not soluble in water, which limits the ways they can be administered and means that they are not soluble in body fluids such as blood plasma and cerebrospinal fluid
A solution of L-alanine (400 ml) is brought to pH 8 and treated with excess formaldehyde. The solution now requires 250 ml of 0.2M NaOH to titrate it back to pH 8. How many grams of L-alanine did the original solution contain
A gaseous sample of this element is bombarded by photons of various energies (in these same units). Match each photon to the result of its absorption (or lack thereof) by an n=1 electron.
consider the dissolution of mns in water ksp 3.0 times 10-14.nbspmnss h2ol mn2aq hs-aq oh-aqhow is the solubility
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