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Problem- A buffer that contains 0.3 M of a base, B and 0.16 M of its conjugate acid BH+, has a pH of 9. What is the pH after 0.03 mol of Ba(OH)2 are added to 0.63 L of the solution?
State your answer by means of three significant figures.
Calcium oxide (lime) reacts with carbon dioxide to form calcium carbonate (chalk). CaO(s) + CO2(g) ? CaCO3(s) ?H = -178.4 kJ (a) Is this reaction exothermic or endothermic?
If the freezing point depression of water is -1.86 degrees/m, what would be the freezing point of this solution
Which of the following properties indicates the presence of strong intermolecular forces in a liquid
After treating an antacid tablet with 5.00mL of 6M HCl, the unreacted acid was diluted to exactly 250mL with distilled water in a volumetric flask. 25.00 mL of that diluted acid required 17.03 NaOH to neutralize it. Calculate the amount of acid ne..
First of the reactant is 2-methyl-2-butanol and the products are 2-methyl-1-butene and 2-methyl-2-butene. I started out with exactly 1.2g 2-methyl-2-butanol and my final product was 0.09 g.
Ammonium hydrogen sulfide decomposes according to the following reaction, for which Kp = 0.451 at a given temperature. If 55.0 g of NH4HS is sealed inside a 5.00 L container at this temperature, calculate the partial pressure of NH3(g) at equilibr..
For a certain glass electrode, the selectivity coefficient for Na+ relative to H+ is 1.0E-12. The electrode is calibrated with NBS standard buffers 6.86 and 9.18,
A can of mineral water contains 345 mL of water. How many molecules of water does the can contain? (water = 1.00 g/mL)
Which of the following pairs of amino acids would carry a negative charge on their side chain at pH 8.0?
If 50.0g of sulfuric acid is spilled, what is the minimum number of moles of sodium carbonate that have to be added to it to complete this reaction?
Justify the Born-Oppenheimer approximation based on vibrational frequencies and the timescale for electron motion.
certain metals can be extracted from their salts usually halides those containing group 17 elements such as chlorine
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