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balance the equation and find the net ionic equation

1) Determine net ionic equations, if any, occurring when aqueous solutions of the following reactants are mixed.
Select "True" or "False" to indicate whether or not the stated reaction (or "no reaction") correctly corresponds to the expected observation in each case.

Magnesium chloride and sodium hydroxide; No reaction occurs.
Nickel(II) chloride and lead(II) nitrate; Pb2+(aq) + 2Cl-(aq) = PbCl2(s)
Sodium bromide and hydrochloric acid; Na+(aq) + Cl-(aq) = NaCl(s)
Ammonium sulfate and barium nitrate; No reaction occurs.
Sodium phosphate and potassium nitrate; No reaction occurs.

2) Balance the following reaction occurring in acidic aqueous medium.
Reduce all coefficients to the lowest possible integral values.

As2S3(s) + NO3-(aq) ---> H3AsO4(aq) +NO(g) + S8(s)

How many H+ ions appear in the correctly balanced equation, and on which side of the arrow?


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