Determine the experimental vant hoff factor
Question: The freezing-point depression of a 0.100 m (molality) MgSO4 solution is 0.225 degrees Celsius. Determine the experimental van't Hoff factor of MgSO4 at this concentration.
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Calculate the H3O+ concentration and the PH for the following: a) a solution with OH- concentration= 4.5*10^-4 M? b) a solution with a pH of 5.6
Part A: Thymolphthalein is an indicator that changes color over a range from pH = 9.3 to pH = 10.5 . What is Ka of thymolphthalein. Part B: Alizarin yellow R, Ka=7.9x10^-12, is yellow in its protonated form (HX) and red in its ionized form (X-)
If the total mass of CO2 produced is 34.8 grams, what was the approximate mass of the methane in the original mixture?
Draw the structures of and label as the major and minor dehydrohalogenation products of reaction between 2-bromo-2-methylbutane with sodium ethoxide in ethanol.
Calculate the percent yield of benzophenone to triphenylmethyl reaction. started with 4.09g of benzophenone and ended up with .682g triphenylmethyl can anyone help me convert these into moles and calculate the yield
Calculate the pH at the points in the titration of 40.00 mL of 0.425 M NH3 for the reaction below. NH3(aq) + HNO3 NH4+(aq) + NO3?(aq) For NH3, Kb = 1.8x10-5.
If a formic acid/formate buffer is 0.031 M in formic acid and has a pH of 3.91, what is the molar concentration of the formate ion? The pKa of formic acid is 3.75.
look up the densities of ethanol and water at room T in a habnbook ethanol 0.789 g/cm^3 and water 0.998 plot these two points on a graoh at 0 and 100%H2O
Write a net ionic equation for the precipitation reaction, if any, that occurs when aqueous solutions of the following ionic compounds are mixed.
One metric tonne(t) equals 1000kg. What is the amount of sulfur dioxide produced by a power plant that burns 7.5 million metric tonnes(t) of coal over a year? Assume that the coal is 2.4% sulfur by mass.
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