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A solution has a hydronium ion concentration of [H3O+] = 5.3 x 10^-4 Determine the pH of this solution.
We place the 2.00M HCl into the buret tube. Next we place 30.0 mL of the KOH unknown Molarity solution into a small flask and add some phenolphthalein indicator turning the solution an intense pink
a 0.0571g sample of platinum sulfate was dissolved in dilute HCl and treated with 10% BaCl2 solution. The BaSO4 precipitate weighed 0.0801g. Determine the formula of this sulfate of platinum. The at
Rates of reactions: Rate = k [A]^m [B]^n where the reaction time = 1 / Rate. Two chemical experiments were performed to determine the exponent "n". (We will assume that "m" is known).
The sulphate ionis trapped as water-insoluble BaSO4. The quantity ofBaSO4 obtained is 0.2070g. What is the mass percent ofsaccharin in the sample of sweetener
A compound is found to contain 64.80 % carbon, 13.62 % hydrogen, and 21.58 % oxygen by weight. What is the empirical formula for this compound
A compound is found to contain 10.37 % phosphorus, 4.689 % nitrogen, and 84.95 % iodine by weight. What is the empirical formula for this compound
You titrate a 0.1000 M solution of a strong base (NaOH) with a 100.00 mL solution of 0.1000 M Formic acid (Ka = 1.80 x 10^-4). Calculate the pH at the following points 100.0 mL of NaOH added
What is the pH of a buffer that results when .60mol NaF is mixed with 100ml of 2.0M HCl and diluted with water to a final volume of 250 ml? (Ka of HF=7.2e-4)
A 25 ml sample of .30M sodium acetate is titrated with .3M HCl. What is the pH after addition of 12.5 ml of HCl. (Ka= 1.8e-5)
In the concentration range of 500 to 2000 ppm of U, there is a linear relationship between absorbance at 351.5 nm and concentration. At lower concentrations the relationship is nonlinear unless abou
What length of mirror drive in a Michelson interferometer is required to produce a resolution sufficient to separate a) infrared peaks at 500.6 and 500.4 cm-1
Combine 15.0 mL of 0.125 M chromium (III) nitrate and 15.0 mL of 0.125 M ammonium carbonate. What is the limiting reactant
For the reaction below, if the rate of apperance of Cl2 is .022M/s, what is the rate of appearance of NO
An empty cell exhibited 11.5 interference fringes in the region of 1050 to 1580 cm-1. What was the path length of the cell
Use the Boltzmann equation to calculate the excited-state and ground-state population ratios for HCl: N(v=1)/N(v=0). The fundamental vibrational frequency of HCl occurs at 2885 cm-1.
A piston has an external pressure of 8.00 atm. How much work has been done if the cylinder goes from a volume of 0.170 liters to 0.530 liters.
The wavelength of the fundamental N-H stretching vibration is aobut 1.5 µm. What is the approximate wavenumber and wavelength of the first overtone band for the N-H stretch
A piston has an external pressure of 8.00 \rm atm. How much work has been done if the cylinder goes from a volume of 0.170 liters to 0.530 liters.
If you predicted that no ionic compound would form from the reaction in part e, what minimum amount of AX(s) lattice energy might lead to compound formation
If 10ml of 0.1M zinc nitrate were added to 25mL of 0.1M Ba(OH)2, what would you obersve? write a chemical reaction for this process.
what are the products of the following acid base reaction and are the reactants or products favored? CH3-NH-CH3 + H3O+
A buffer solution is prepared by dissolving 0.075 moles of HOBr and 0.075 moles of NaOBr in 500mL of solution. Calculate the pH of this buffer. (HOBr: Ka = 2.4 * 10^-9)
You are to prepare buffers at pH = 2.8, 4.5, and 7.5. In the 2nd column write the fomulas for the respective weak acid-conjugate base buffer system that is the best choice for each pH from the liste
The heat of combustion of bituminous coal is 2.5 × 104 J/g. What quantity of the coal is required to produce the energy to convert 100. lb of ice at 0°C to steam at 100°C?