Determine the change in ph of the solution
100.0 ml of a buffer consists of the 0.20 M NH3 and 0.01 M NH4Cl (pKb of NH3=4.75) Determine the change in pH of the solution after the 25.0 ml of 0.10 M of HI has been added?
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A student wishes to determine the density of a solution of sodium hydroxide. He finds the mass of the flask to be 25.631 g. He finds the mass of the flask filled with sodium hydroxide solution is 36.138 g.
Write the balanced equation for the reaction and determine the enthalpy change that occurs when1.5 moles of hydrazine is burned. In liquid-fuel rockets the fuels are liquid hydrazine (N2H4) and dinitrogentetroxide gas (N2O4).
Explain which of the three reagents used in your synthesis of Alum experiment was the limiting reactant (1.5 M KOH, 4.5 M H2SO4 or the Al)? Calculate the spectrographic electron configuration for Li?
Explain how would you prepare 150.0 ml of a buffer having a pH of 7.05 using solid sodium hydrogen phosphate and solid sodium dihydrogenphospate?
Assume that the mean score on this test is 75.6 with standard deviation of 7.8. Assume also that the scores follow bell-shaped distribution.
A buffer contains 0.1500 M KNO2 and 0.2000 M of HNO2. Describe the pH after the 0.0020 mol of HCL is added to the 250 ml of this solution.(Assume there are no volume changes when the acid is added.)
Test at the 1% level the null hypothesis that population proportions are equal against the alternative that the higher proportion of French have a positive attitude towards car salesmen.
Determine the binding energy (in MeV/nucleon) for the following nuclides: Copper-63 ( which is having the atomic mass = 62.93960 amu)
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