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Calculate the end point pH, when 25 mL of 0.01 mol/L HCl solution reacts exactly with 25 mL of 0.1 mol/L NH4OH solution. NH3 Kb = 1.8 x 10^-5This will be the pH of NH4Cl solution. NH4+ + HOH ==> NH3 + H3O^+ Ka = Kw/Kb = (NH3)(H3O^+)/(NH4^+). Solve for H3O^+, then pH = - log(H3O^+). Post your work if you get stuck. But we haven't learned how to get the pH of H3O+...we only get the pH of [H+].Same thing. They are all H3O^+ but sometimes we get a little lazy and instead of writing H3O^+ or H*H2O^+ we just omit the water part and write H^+.
Given a stock solution of a food dye having a concentration of 1.0 x 10-5 and an absorbance of 0.700. If a new solution is made by diluting exactly 10.0 mL of the solution with exactly 15.4 mL of distilled water, what should the absorbance of the ..
Calculate the molar solubility of CaF2 at 25C in a solution that is (a) 0.010M Ca(NO3)2 and (b) 0.010M NaF
a solution is prepared by dissolving 4.21 g of a non electrolyte in 50 g of water. if the boiling point increases by .203 degree celsius, what is the molar mass of the solute? the boiling point elevation constant for water is .502 degree celsius p..
what is the pressure in a gas containter that is connected to an open-end manometer if the pressure of the atmosphere is 722 torr and the level of mercury in the connected to the container is 8.60cm
What is the molar composition of the vapor in equilibrium with a boiling liquid that has a composition of 60% A and 40% B
Calculate the molar mass of naphthalene, the organic compound in mothballs, if a solution prepared by disovlving 7.50g of naphthalene in exactly 150g of benzene has a freazing point 2.0 degrees
A quantity of 6.0 moles of an ideal gas is reversibly heated at constant volume from 17 C to 35 C. Calculate the entropy change.
A diprotic acid, H2A, has the following ionization constants: Ka1 = 1.1 multiplied by 10-3 and Ka2 = 2.5 multiplied by 10-6. In order to make up a buffer solution of pH 5.80, which combination would you choose, NaHA/H2A or Na2A/NaHA?
Explain the importance of a universal standard in measurement
Twenty-five mL of 0.150 M hydrofluoric acid, HF, is titrated with 0.100 M potassium hydroxide. What is the pH of the acid initially (before any base is added)?
What is the approximate percent of complexed iron in a 0.1 M Fe3+ solution containing 1 M KSCN? Kf FeSCN2+ = 1.2*10^2
A student is concentrating a solution having a polypeptide of modest molecular weight by pressure filtration through a membrane. The solute concentration on the feed side of the membrane is 0.10 M and the temperature is twenty five degree celsius.
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