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Phosphoric acid is a triprotic acid (Ka1 = 6.9× 10-3, Ka2 = 6.2× 10-8, and Ka3 = 4.8× 10-13). To find the pH of a buffer composed of H2PO4-(aq) and HPO42-(aq), which pKa value would you use in the Henderson-Hasselbalch equation? Calculate the pH of a buffer solution obtained by dissolving 22.0 g of KH2PO4(s) and 36.0 g of Na2HPO4(s) in water and then diluting to 1.00 L.
A 9.767-g gaseous mixture contains ethane (C2H6) and propane (C3H8). Complete combustion to form carbon dioxide and water requires 1.120 mol of oxygen.
Why are the products attached to C3 of 1,4 pentadiene more acidic than the methyl hydrogen atoms of propene? Maybe you can help me with this one. Are the C3 atoms more acidic because there is more s character involved with the atoms and as the s ch..
Why is sulfuric acid, rather than hydrochloric acid, used to catalyze the dehydration of alcohols?2. A sample of 150 mg of an organic compound is dissolved in 7.5 ml of water. The solution is paced in a 20-cm polarimeter tube and the rotation meas..
CaC2 (s) + 2H2O (l) → C2H2 (g) + Ca(OH)2 (aq) If 32.0 g CaC2 are consumed in this reaction, how many moles of H2O are needed?
why do we need to excess FCR? Also give 3 reasons why gallic acid is used as standard for the total phenolic assay?
If each mole of gas occupies 55 L under the conditions of the explosion, how many liters of gas are produced? c) how many grams of N2 is produced in the detonation?
Explain Vapor Pressure of Ideal Solutions, At 25C the vapor pressures of chloroform and carbon tetrachloride are 26.54 and 15.27 kPa respectively. If the liquids form ideal solutions
What is the difference between a strong acid and a weak acid. Calculate [H30+] in each aqueous solution at 25 C and classify each solution as acidic or basic one.
An unknown gas effuses at a rate of 86.6 mol/hr. Under similar conditions, I2 effuses at a rate of 30.4 mol/hr. What is the molar mass of the compound.
A stock solution is prepared by adding 10 mL of 2.5 M Ba(CN)2 to enough water to make 23 mL. What is the CN- concentration of 5 mL of the stock solution
When (R)-2-butanol is treated with TsCl in pyridine,the product formed and Classify the reaction
A 325 mL sample of solution contains 25.3 grams of CaCl2. Calculate the molar concentration of Cl- in this solution.
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