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The concentration of Cu2+ ions in the water (which also contains sulfate ions) discharged from a certain industrial plant is determined by adding excess sodium sulfide (Na2S)solution to 0.800L of the water.
The molecular equation is:Na2S (aq) + CuSO4 (aq) ----> Na2SO4 (aq) + CuS (s)
Write the net ionic equation and calculate the molar concentration of Cu2+ in the water sample if 0.0177g of solid CuS is formed.
A chemist must prepare 0.9 L of sodium hydroxide solution with a pH of 13.40 at 25 C. He will do this in three steps: Fill a 0.9 L volumetric flask about halfway with distilled water.
Suppose that each sphere represents 6.7×1021 molecules and that the volume of the container is 1.0 L. What is the rate constant for the reaction in the usual units?
Calculate the concentration of the hydronium ion and the the pH in a solution that is formed by combining 300 ml of 0.10 M NaOH with 180 ml of .15ml of .15 M H2SO4.
container at a temperature of 47C exerts a pressure of 6.3 atm. Calculate the number of moles in the sample
If you used 5.0 g of salicylic acid and excess acetic anhydride in the preceding synthesis of aspirin, what would be the theoretical yield of acetylsalicylic acid in moles and in grams
a mixture contains 76.5 nacl and 6.5 mgcl2 and 17 na2so4 by mass what is the molarity of cl- ions in a solution formed
Assuming the solution has a heat capacity of 4.18 J/°C · g and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol.
Calculate the heat of formation, Hof, of pentane given that the Hof of H2O(l) is -285.3 kJ mol-1 and Hof of CO2(g) is -393.5 kJ mol-1.
The lab is synthesis of Methyl Red. The question is starting with the appropriate aromatic amine and using any other organic or inorganic reagent, outline a synthetic sequence for the preparation of Chrysoidine, Para red and Congo red
A compound of bromine and fluorine is used to make UF6, which is an important chemical in processing and reprocessing of nuclear fuel. The compound contains 58.37% by mass of bromine. Determine its empirical formula.
The composition by mass % of methyl alcohol, ethyl alcohol, n-Propyl alcohol and water in two solutions A and B are given below.
calculate the freezing point and boiling point of a solution of 383 g of glucose dissolved in 400. g of
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