Problems in Chemistry
#1 You dissolve 12.6352 g of potassium iodide in water and bring the volume of solution to 250.0 ml. What is the molar concentration of KI?
#2 What volume of 0.0436 molar hydrochloric acid is required to react with 30.0 ml of 0.0278 molar LiOH?
#3 An AM radio station broadcasts using electromagnetic radiation at 1490 kilohertz. What is the wave length of this radiation in meters?
#4 Using the Bohr equation for the hydrogen atom calculate the ionization energy for hydrogen.
#5 Give the electron configuration of each of the following atoms using the inert gas notation. (a) K (b) Mn
#6 Give the set of four quantum numbers that describe the last electron to be placed in the electron configuration of the following atoms. (a) Xe (b) Si
#7 Write the ionic equations for the following reactions in aqueous solution.
a. HNO3 (aq) + KOH (aq) ---> KNO3 (aq) + H2O (1)
B. BaCL2 (aq) + Na2SO4 (Aq) --> BaSO4 (s) + 2 NaCL (aq)