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A buffer is prepared by mixing 500 ml of 0.4 M Na2HPO4 with 500 ml of 0.2 M NaH2PO4. what is the pH of this buffer? What would be the final pH if you added the same quantity of acid to 1 litre of H2O (pH 7)?
it is found that the equilibrium concentrations in a 5.00 L rigid container are [H2] = 0.0500 M, [F2] = 0.0100 M, and [HF] = 0.400 M. If 0.338 mol of F2 is added to this equilibrium mixture, calculate the concentrations of all gases once equilibri..
Mass(volume)of cold water:75.0g Temperature of cold water: 23.0 degree celsius Mass(volume) of hot water: 75.0g Final temperature: 41.1 degree celsius find the temperature change and the calorimeter constant.
A buffer solution is made by dissolving 2.5g benzoic acid and 2.7 sodium benzoate in 100mL water. 15 mL of 0.125M NaOH is added to the solution
Cyclopropane has significantly less angle strain than cyclopropane, yet is only slightly lower in energy. How can this be true? How does this information relate to the fact that cyclobutane is not a planar molecule
In each of the following groups of substances, pick the one that has the given property. Explain your reasoning for each.
at 25 c and 1.0 atm .25 g of a gas dissolves in 1.00l of water. what mass of the gas dissolves in 1.00l of water at 25c
Draw the structure (on a scratch sheet of paper) for the molecule that fits the following description and then name it according to IUPAC formalism:
Born-Haber cycles are called cycles because they form closed loops. If any five of the six energy changes in the cycle are known, the value of the sixth can be calculated.
If 2.44 moles of Helium gas has a pressure of 2.4 atm at 343 K, what volume must the gas occupy.
Calculate the [Cr+3] in equilibrium with Cr(OH)4-(aq) when 0.010 mol of Cr(NO3)3 is dissolved in a liter of solution buffered at a pH of 7.3. Kf for Cr(OH)4-(aq) is 8.0 x 1029.
What is the substance being oxidized?
What is the density (in grams per liter) of a gas mixture that contains 26.0 % F_2 and 74.0 % He by volume at 743 mm Hg and 28.5 C?
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