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Calculate the pH and pOH of the solutions with the following hydrogen ion or hydroxide ion concentrations. Indicate which solutions are acidic, basic, or neutral. (And please show how to solve! Thanks!) a. [OH-]= 7.69x10^-3 M b. [OH-]= 2.18x10^-9 M c. [H+]= 4.0x10^-8 M d. [H+]= 3.56x10^-4 M
What is the molar concentration of As(III) in a solution if 28.95mL of 0.120 M KBrO3 is needed to titrate 54.65 mL of the As(III) solution? The balanced equation is
A sample of the unknown complex is analyzed and has an absorbance of 0.528. What is the molar concentration of Cu^2+ ions in the unknown solution?
What is the ph of the buffer that results when 12.0 g of NaH2PO4 and 8.00 g of Na2HPO4 are diluted with water to a volume of 0.50 L? ( ka of H2PO4 = 6.2 X10-8, the molar masses of NaH2PO4 and Na2HPO4 are 120.0 g/mol and 142.0 mol respectively)
balanced oxidation half reaction and balanced reduction half reaction?
A balloon has a volume of 10,500 liters, and the temperature is 15°C. If the temperature were -25°C, what would the volume of the balloon be?
An equilibrium mixture contains {\rm{N}}_2 {\rm{O}}_4, (P = 0.27 atm) and {\rm{NO}}_2 (P = 1.2 atm) at 350 {\rm K}. The volume of the container is doubled at constant temperature.
What phase changes occur when the pressure is held constant at 0.25 atm and the temperature increases from 100 °C to 300 °C?
Consider the following reaction, equlibrium concentrations, and equilibrium constant at a particular temperature. Determine the equilibrium concentration of SO3(g)
Calculate the molar amounts of NaOH used in the reaction with the HCI solution and with the HC2H3O2 solution?
Explain why it would have been inadvisable to supply hydrogen and sodium in elemental form and why it is not neccessary.
In the laboratory you dissolve 15.4 g of zinc acetate in a volumetric flask and add water to a total volume of 500 mL.
Chromic acid is a diprotic acid H2CrO4 with Ka1 = 0.18 and Ka2 = 3.2 x 10-7. A solution of potassium chromate is prepared at pH 5.43. Calculate the fraction of the total chromate in this solution that is present as the chromate ion CrO42-.
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