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To determine the freezing points of distilled water, 1m glucose, 1m NaCl, 1m CaCl2. Use the freezing point of the pure water as a baseline to determine deltaTf for each of the solutions (glucose,NaCl,CaCl2) On the basis of these values, calculate the freezing point Coefficient (Kf) for water in each case and compare your average Kf value to the accepted value. This confuses me. I would like to know what to do here. additional info. for calculating molality we used 0,05kg water. So glucose was 180g/mol> 9g NaCl 58.5g/mol > 2.9g CaCl2 147g/mol > 7.4g these are the values we used
A student traces of brown deposite during the KMnO4 (NH4)2Fe(SO4)2 titration and quickly add more H2SO4 and continued his titration?Suggest what wil happen and why.
Two determinations of the dissolved oxygen content of a 200 mL sample of water, made five days apart, gave 5.3 ppm and 2.2 ppm of dissolved O2 respectively.
if 76g of Cr2O3 and 27 g of al completely react to form 51 g of Al2O3 how many grams of Cr are formed?
Calculate the molecular weights of the 5 congeners listed above. What do the trends of log KOA, log KOW, and the negative log of water solubility vs. molecular weight indicate about the relationship between molecular weight and
If a mixture of 41.25 g of aluminum and 58.83 g of oxygen reacts, what mass of aluminum oxide can be formed?
What are the n and l quantum numbers of the electron removed when Bi is ionized to Bi+ and would you expect element 115 to have ionization energy greater than, equal to, or less than that of bismuth? Explain.
what is the correct expression for computing the volume of gas at STP and determine What is the mass percent yield from 1.79 g of Sb in excess S, is obtained if 1.14 g of Sb 2 S 3 ?
A student is presented with a sample of an unknown substance and asked to classify the substance as organic or inorganic
Calculate the molarity and mole fraction of a 1.43 m solution of acetone (CH3COCH3) dissolved in ethanol (C2H5OH). (Density of acetone = 0.788 g/cm3; density of ethanol = 0.789 g/cm3.)
If 0.5110 g of H2C2O4 x 2H2O completely neutralized 41.39 mL of the stock NaOH soln what is the concentration of the NaOH solution?
AgBr is the light-sensitive compound in most photographic films. Assume, when film is exposed, that the light energy absorbed dissociates the molecule into atoms.
If 1.50 g of (NH4)2SO4 is dissolved in enough water to form 200. mL of solution, what is the molarity of the solution.
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