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Phosphoric acid is a triprotic acid: H3PO4(aq) +H2O(l) ? H3O+(aq) + H2PO4-(aq) Ka1 = 7.5 x 10-3 H2PO4-(aq) +H2O(l) ? H3O+(aq) + HPO42-(aq) Ka2 = 6.2 x 10-8 HPO42-(aq) +H2O(l) ? H3O+(aq) + PO43-(aq) Ka3 = 4.8 x 10-13 Determine whether sodium monohydrogen phosphate (Na2HPO4) is neutral, basic, or acidic. First, what is its Ka when it acts as an acid? Second, what is its Kb when it acts as a base?
What are the products from the combustion of 2-methyl-3-ethyloctane?
how many moles of Cu2O can be produced from the reaction of 0.66 mol Cu with 0.40 mol O2?
Define Supercritical fliud. Give an example and it's properties. Which fundemental thermodynamic property is important to the solubility
What is the pE value in an acid mine water sample having [Fe3+] = 6.79E-3 M and [Fe2+] = 4.14E-4 M?
Lyzozyme(The protein) unfolds at a transition temperature of 75.5 degree celsius, the standard enthalpy of transition = 509 kJ/mol. Compute the entropy of unfolding of this protein at the temperature of twenty five degree celsius
cube of a silver-colored metal with a volume of 64 cm3 has a mass of 672 g. The density of pure silver is 10.5 g/cm3. Is the metal pure silver?
If we took EXACTLY 1.00 ml of a 1.000 M solution of Cu(NO3)2 and placed it in 99.000 ml of water and mixed it, then took 2.00 ml of this solution and placed it in 18.000 ml of water.
Calculate the molarity of a solution of glycerol made by dissolving 53.000 mL glycerol at 15 'C in enough water to make 270.00 mL of solution.
A 4.05 g sample of a compound containing only C, H, and O was burned completely. The only combustion products were 10.942 g CO2 and 4.476 g H2O. What is the empirical formula of the compound.
Compute the molar mass of vitamin C if a solution of 22.7 g in 100. g of water freezes at -2.40 oC. The Kf of water is 1.858 oC kg/mol.
If solar radiation is 1200 W/m^2, how many photons strike the leaf every second? Assume three significant figures and an average wavelength of 504 nm for solar radiation.
If the pressure exerted by a gas at 25°C in a volume of 0.032 L is 2.79 atm, how many moles of gas are present?
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