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problem 1: An acre-foot is an antediluvian but frequently used unit for measuring large volumes of water. Find out the conversion factor between acre-feet and cubic meter. Note that one part of a township is a one mile by one mile tract and contains 640 acres.

problem 2: prepare a balanced, net-ionic equation for the reaction, if any, that takes place when aqueous solutions of the given pairs of reagents are mixed:

a) Hydrobromic acid + ammonia
b) Hydrobromic acid + methylamine [CH3NH2]
c) Potassium hydroxide + nitric acid
d) Potassium hydroxide + nitrous acid (a weak acid)
e) Sodium sulfide + lead(II) nitrate
f) iron (III) chloride + sodium hydroxide
g) Propionic acid [CH3CH2COOH] + sodium hydroxide
h) Cesium bromide + copper(II) nitrate
i) Cesium bromide + copper(I) nitrate [Cu2(NO3)2]

problem 3: Ammonia is a non-planar polar molecule which has three N-H single bonds and one lone pair of electrons.

a) describe the structures of the molecular species which form when sodium bromide dissolves in liquid ammonia.

b) Nitric acid is a very strong acid and ionizes 100% when it is dissolved in the ammonia. prepare a balanced, net-ionic equation for the ionization reaction in liquid ammonia.

c) prepare a net-ionic equation for the reaction which takes place when ammonia solutions of nitric acid and sodium amide [NaNH2] are mixed.

d) prepare a net-ionic equation for the reaction which takes place when ammonia solutions of acetic acid and sodium amide are mixed.

problem 4: prepare a balanced, net-ionic equation for the reaction that occurs when an aqueous solution of iron(II) nitrate is mixed with each of the given aqueous solutions:

a) Sodium silicate
b) Sodium cyanide
c) Acidified hydrogen peroxide
d) Acidified potassium permanganate.

problem 5: prepare a balanced, net-ionic equation for the reactions which take place when aqueous solutions or slurries of the given pairs of reagents are mixed.  A reaction takes place in each case. The second reagent of each pair of reagents is present in large excess in each and every case.

a) Manganese (II) nitrate + ammonia
b) Sodium carbonate + hydrofluoric acid (a weak acid)
c) Iron metal + cold, dilute nitric acid
d) Iron metal + hot, concentrated nitric acid
e) Manganese (II) phosphate + cold, dilute nitric acid
f) Cobalt (II) hydroxide + potassium cyanide
g) Sodium monohydrogen sulfite + lithium hydroxide

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  • Category:- Chemistry
  • Reference No.:- M93210

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