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If the freezing point constant for water is 1.86 ºC/m and assuming ideal conditions, determine the freezing point of a 0.0100 m aqueous solution of Na2SO4.
How many grams of benzoic acid (C6H5COOH) are contained in a 100.0 mL solution at 0.39 M concentration?
What mass of this substance must evaporate in order to freeze 160 g of water initially at 19 C? (The heat of fusion of water is 334 {J/g}; the specific heat of water is 4.18 {J/g c. K}.)
what are the main sources of error in a calorimetry experiement. describe at least three errors.
A particular Lake contains 10^10 liter of water. Due to acidification, the pH of the Lake is 5.00. It has been decided to add enough calcium carbonate to the lake to bring the pH to 6.00.
A solution is initially 0.050M in acetate, CH3COO- (Kb = 5.6 x 10^-10). 10.0mL of 0.10 M HCl is added. Calculate Ka for the conjugate weak acid of CH3COO-
A solution of 1.138g of naproxen in 25g benzene has an osmotic pressure of 4.00 atm at 20 C. The density of benzene is 0.8787g/mL. Assume the density of the solution equals the density of pure benzene. What is the molar mass of haproxen
How many grams of lead chromate form when a 1.00-g sample of Pb(NO3)2 is added to 5.0 mL of 1.00 M K2CrO4 solution.
the equilibrium would shift to the right making more products e. the equilibrium would shift to the left making more products
a solution is prepared by adding 50.0ml of 0.050m HBr to 150.0ml of 0.10m HI .calculate the concentrations of all species in this solution HBr and HI are both considered strong aicds ?
What is the value of Keq for the reaction 4 HCl(g) + O2(g) reverse reaction arrow 2 Cl2(g) + 2 H2O(g)?
As a separation and detection method, would TLC or paper chromatography yield better results in the analysis of each of the following pairs of compounds?
Calculate the molar solubility of iron sulfide in a solution that is saturated with hydrosulfuric acid, H2S ( [H2S] = 0.1 M) and has a pH of 2.0. Ka1 = 8.9 x 10^-8 and Ka2 = 1.2 x 10^-13.
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