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Calculate the concentrations of H+, H4IO6-, and H3IO62- in a 0.200 M H5IO6 solution. Use the following equations:
H5IO6(aq) <---> H+(aq) + H4IO-6(aq) Ka1=2x10-2
H4IO6-(aq) <---> H+(aq) + H3IO62- (aq) Ka2= 5x10-9
the temperature of the calorimeter (including its contents) rose from 23.18oC to 27.65oC. What mass, in g, of benzoic acid was burned. here is what i did, 3226/122.13=26.41 delta t =4.474 so 4.474*12.5/26.41 =2.12 is the answer 2.12g
Lactose, C12H22O11, is a naturally occurring sugar found in mammalian milk. A 0.335 M solution of lactose in water has a density of 1.0432 g/mL at 20 degrees Celsius. What is the concentration of this solution in the following units
which is the lowest at 25 C a) deltaG f for H2O(s) b) deltaG f for H2O(l) c) deltaG f for H2O(g) d) 1/2 deltaG f for O2(g) plus deltaG f for H2O(g)
What is the pH of a buffer prepared by adding 0.506 mol of the weak acid HA to 0.507 mol of NaA in 2.00L of solution? The dissociation constant Ka of Ha is 5.66 x 10^-7.
Classify each compound as a strong electrolyte, weak electrolyte, or non-electrolyte. HI HClO4 CH3OH HC2H3O2
The vapor pressure of pure methanol, CH3OH, at 30 C is 160. torr. How many grams of the nonvolatile solute glycerol, C3H5(OH)3, must be added to 131. g of methanol to obtain a solution with a vapor pressure of 133. torr.
Using the following equation for the combustion of octane (C8H18) , calculate the heat of reaction (enthalpy change) when 100.0 g of octane C8H18 reacts with oxygen in a combustion reaction. The molar mass of octane is 114.33 g/mole.
A quantity of HI was sealed in a tube, heated to 425C, and held at this temperature until equilibrium is reached. The concentration of HI in the tube at equilibrium was found to be 0.0706 moles/liter
Coniine, a toxic substance isolated from a poison hemlock, contains only carbon, hydrogen, and nitrogen. Combustion analysis if a 5.024mg sample yields 13.90mg of CO2 and 6.048mg of H2O. What is the empirical formula for Coniine
what is the first step in drawing the lewis structure for a molecule or
Dimethylamine, (CH3)2NH, is a weak base ( Kb = 5.4 x 10?4). What is the pH of a 0.50 M solution and what is the percent dissociation
Calculate the concentrations of all species at equilibrium for the following case.
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