Identify the neutralization reaction. 2nh3 + h2so4 ⟶ (nh4)2so4 2h3po4 + 3ba(oh)2 ⟶ 6h2o + ba(po4)2 2 no2 ⟶ 2 o2 + n2 po4 3pb + 2h3po4 ⟶ 3h2 + pb3(po4)2

  The neutralization reaction is
 

2H3PO4 + 3 Ba(OH)2 = 6 H2O  + Ba(PO4)2
 
This is because a neutralization reaction involve  a reaction between an acid and  a base   to form  a salt   and water.  for the reaction above  H3PO4 is the acid while Ba(OH)2 is  a base  which react to form Ba(PO4)2  a  salt  and water.

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Rate law for this reaction israte of the reaction = k[a]²[b].second order in a  means concentration of a in power of two, and  first order in b means concentration of b in power of one.