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If a buffer is made up to be 1.0 M in acetic acid and 1.0 M in sodium acetate predict how much acid will be required to change the pH of 100 mL of the buffer by 0.1 pH units
Calculate the pH of the resulting solution if 22.0 mL of 0.220 M HCl(aq) is added to (a) 32.0 mL of 0.220 M NaOH(aq). (b) 12.0 mL of 0.320 M NaOH(aq).
For a particular redox reaction MnO2 is oxidized to MnO4- and Ag is reduced to Ag. Complete and balance the equation for this reaction in basic solution
Complete and balance the equation for this reaction in acidic solution. MnO4- + HNO2 -> NO3- + MN2+ Which element got oxidized. Which element got reduced. Which Species was the oxidizing agent
What is the molecular equation, total ionic equation, and net ionic equation for the reaction of Pb(NO3)2 and HCl
Solid melting infinitesimally slowly at its melting point. liquid freezing below its freezing point. liquid vaporizing above its boiling point
a) If one of the electrodes is Al (suspended in a 1 M Al3+ solution), and the volt meter reads 2.00 volts, what is the identity of the other solid metal electrode
What is the molecular equation, total ionic equation, and net ionic equation for Cu(NO3)2 and NaOH
The KHP you used had not been dried. b) When filling the buret with NaOH you left a air bubble in the buret tip.The bubble was released during your first KHP titration.
If the standard enthalpy of combustion of octane, C8H18(l), at 298 K is -5471 kJ x mol-1, calculate the standard enthalpy of formation of octane. The standard enthalpies of formation of carbon dioxi
Write the balanced equation for the reaction of aqueous Pb(ClO3)2 with aqueous NaI. Include phases.
Calculate the standard reaction enthalpy for the following reaction. N2H4(l) + H2(g) -----> 2NH3(g) Given: N2H4(l) + O2(g) -------> N2 (g) + 2H2O(g)
What is the pressure in atmospheres inside a container of gas connected to a mercury-filled open-end manometer when the level in the arm connected to the container is 28.0cm higher than the level in
An electrochemical cell has an Eocell of 2.00 V and transfers 1 mole of electrons. The Faraday constant is 96,485 C/mol e-. What is the value of delta G
Use Slater's rules to calculate the shielding constant and effective nuclear charge for a 5s, 5p, and 4d electron in the tin atom. Which of these electron experience the lowest effective nuclear cha
A hydrogen atom in its ground state absorbs a UV photon at a wavelength of 93.8 nm. It then re-emits a photon as it relaxes to the n=2 energy level.
Calculate the standard reaction enthalpy for the oxidation of nitric acid to nitrogen dioxide, 2NO(g) + O2(g) ----> 2NO2(g) from the standard reaction enthalpies of
To what energy level was the electron initially excited. (b) What is the net energy absorbed or emitted by the atom (in units of eV) in the overall process
The HCl molecule has a bond length of 127 pm and has partial charges of (+)(-)0.177e. What is the dipole moment of the HCl molecule in units of Debye (D)
If the pressure is increased to 120 bar, the melting temperature increases to 375.88 K. Calculate DeltaHo fusion and Delta So fusion for this substance
A fuel gas containing 75% methane, 15% ethane and 10% propane by volume flows to a furnace at a rate of 1200m^3/hr at 15'C and 200kPa, where it is burned with 12% excess air. Calculate the required
(1) Consider the following pairs of substances. Think about the physical behavior of these substances if each pair were placed together in a separate container. Explain what would occur for each set
What is the density (in grams per liter) of a gas mixture that contains 20.5% F2 and 79.5% He by volume at 793mm Hg and 28.5C