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100.0mL of a K2HPO4 solution is titrated with 0.1187M NaOH. The endpoint is reached when 115.4mL of OH- has been added. Find out the mass of K2HPO4 dissolved in the original 100.0 mL H2O as well as the pH of the solution at the end point of the titration.
H3PO4 (aq) + H20 <-> H2PO-4 (aq) +H3O (aq) Ka1=7.11x10^-3
H2PO4- (aq) + H2O <-> HPO2-4 (aq) + H3O+ (aq) Ka2=6.34x10^-8
HPO2- 4 (aq) +H2O <-> PO3- 4 (aq) + H3O+ (aq) Ka3=4.22x10^-13
If the uncertainty in velocity of an electron is 4700.0 m/s, what is the minimum uncertainty in its position
Consider the following equation: 2HF (g) H2 (g) + F2 (g) k+ 1.00 x 10 ^-2. Given that 1.00 mol of HF(g) ,0.360 mol of H2(g) , and 0.750 mol of F2(g) are mixed in a 5.00-l flask, determine the reaction quotient,Q Q=?
Platinum crystallizes in a face-centered cubic lattice (the Pt atoms are at the lattice points only). If the density of the metal is 22.3 g/cm3, what is the unit cell edge length in pm
For the following, provide a structure of the molecules described. If the name is incorrect please provide the correct IUPAC name. 3-(1-cyclobutylethyl)-5-[3-cyclopropyl-1-(3-bromo-2-(1,1-dimethylethyl)propyl)propyl]cyclohexane.
Certain sunglasses have small crystals of silver chloride (AgCl) incorporated in the lenses. When the lenses are exposed to light of the appropriate wavelength, the following reaction occurs:AgCl->Ag + Cl.
Consider that there are two sources of OH-in this procedure. Also, an excess of 3 mL will need to be added to your calculated value in order to suppress the hydrolysis of Al 3+.
Calculate the total quantity of heat required to convert 25g of liquid ccl4 from 35 ºC to gaseous CCl4 at 76.8ºC(the normal boiling point for CCl4). The specific heat of CCl is 0.857J/(g ºC), its heat of fusion is 3.27 kJ/mol, and its heat of vapo..
Hypochlorous acid is a weak acid with pKa= 7.41 suppose a 45.00ml sample of 0.240 M HOCL solution is titrated with a 0.250 M standard KOH solution. what is the PH of the equivalence point
The equilibrium constant for the reaction of bromine with chlorine to form bromine monochloride is 58.0 at some temperature. Br2(g) + Cl2(g) ! 2 BrCl(g) What is the value of the equilibrium constant for the following reaction?
What is the maximum amount of ethanol (in millimoles) that could theoretically be produced under the following conditions?
In a laboratory, you determine that the density of a certain solid is 5.23\times10^{-6}\;\rm kg/mm^3. Convert this density into kilograms per cubic meters.
calculate total heat in (J) needed to convert 0.333 mol of gaseous ethanol at 300 degress celsius and 1 atm to liquid ethanol at 25 degress celsius and 1 atm
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