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1. A student titrated a 1.0115g sample of potassium hydrogen phthalate (HKC8H4O4; 204.2285 g/mol, and commonly known as KHP) with sodium hydroxide. The inicial buret reading was 1.16 mL. The final buret reading was 40.62 mL
a) Write a balanced equation for the neutralization of KHP with sodium hydroxide.
b) Calculate the molarity of the sodium hydroxide solution.
2.The sodium hydroxide solution from the previous problem was used to titrate a 1.2587 g sample of unknown acid. 25.62 mL of the sodium hydroxide was required to reach the equivalent point. The acid is known to react with the sodium hydroxide in a 1:1 mole ratio. Calculate the molar mass of the acid.
Problem- Fluorine-18 decays via first-order kinetics and has a half-life of 109.77 minutes. Starting from a 1 gram sample, a) How much F-18 remains after 5 half-life
An equilibrium mixture of PCl5(g), PCl3(g), and Cl2(g) has partial pressures of 217.0 Torr, 13.2 Torr, and 13.2 Torr, respectively. A quantity of Cl2(g) is injected into the mixture, and the total pressure jumps to 263.0 Torr.
The following reaction is used in the haber bosch process for the synthesis of ammonia N2(g)+3H2(g)->2NH3 If the initial rate of appearance of NH3 is 0.625Ms^-1 calculate the initial rate of disappearance (in Ms^-1) of H2
the blah taste of many processed orange juice brands results in part from the fact that the juice must be pasteurized
A certain substance has a heat of vaporization of 74.45 kJ/mol. At what Kelvin temperature will the vapor pressure be 6.50 times higher than it was at 287 K
Hydrogen sulfide is found at a concentration of 3 parts per million in air. Using the temperature and pressure conditions that are considered "standard" for air quality work, this concentration means that there are [Blank] milligrams of hydrogen s..
A 500-g sample of Al2(SO4)3 is reacted with 450 g of Ca(OH)2. A total of 596 g of CaSO4 is produced. What is the limiting reagent in this reaction, and how many moles of excess reagent are unreacted?
what is the quantity in grams of formic acid and sodium formate necessary to make 500 mL of a buffer that has a formic acid concentration of .75 M and a sodium formate concentration of .75 M?
1. Eplain why the membrane potential between the axon hillock and axon either changed or did not change with subthreshold stimulus. Differences of 1.0 mV or less are not significant
Calculate the number of moles of solute present in each of the following solutions
How many moles of oxygen will be produced if 27.6 grams of Al are produced?
Calculate the pH during the titration of 20.00 mL of 0.1000 M C6H5COOH(aq) with 0.1000 M NaOH(aq) after 19.54 mL of the base have been added. Ka of benzoic acid = 6.5 x 10-5.
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