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Suppose a solution contains 0.25 M Pb2 and 0.49 M Al3 . Calculate the pH range that would allow Al(OH)3 to precipitate but not Pb(OH)2. The Ksp values for Al(OH)3 and Pb(OH)2 can be found here.
A solution is made by dissolving 0.100 mols of NaOCl in 100.0 mL of water. The Ka of hypochlorous acid (HClO) is 3.0*10^-8 at 25.0 degrees C.
Furoic acid, HC5H3O3, has a Ka value of 6.76 10-4 at 25°C. Calculate the pH at 25°C for each of the following.
The rate constant for the second- order reaction.starting with a concentration of 0.86m, calculate the concentration of NOBr after 57s.
A solution was prepared by mixing 50.00 mL of 0.190 M HNO3 and 124.00 mL of 0.150 M HNO3. Calculate the molarity of the final solution of nitric acid.
Hydrogen gas was cooled from 150C to 50 C. It's new volume is75 mL. What was it's original volume?
What mass of sucrose should be combined with 479 of water to make a solution with an osmotic pressure of 8.00 at 315 ? (Assume the density of the solution to be equal to the density of the solvent.)
DNA polymerase (DNA pol) requires divalent magnesium for activity. Alcohol dehydrogenase (ADH) requires nicotinamide adenine dinucleotide
If 4.00 g of the unknown compound contained 0.133 mol of C and 0.267 mol of H, how many moles of oxygen, O, were in the sample?
Predict the products when cyclohexanol is heated in the presence of H+. Show both the organic product and the byproduct
Predict the sign of Change in S for this reaction and explain. -Calculate the Change is S from standard molar entropy values. S for Na2O2(s) = 95 J/mol K
A calorimetry experiment determined that the combustion of 1.01 g of H2 reacting with excess O2 producing H2O gave q=143 kJ. Calculate the change in enthaply.
A student adds 0.1 mol of oxalic acid (H2C2O4) and 0.1mol of sodium dihydrogen phosphate to enough water to make 1.0L of solution. The following equilibrium is established with Kc from this reaction greater than 1
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