Which of the following unbalanced reactions are precipitation reactions?Select all that are True.  Ba(OH)2(aq) + H2SO4(aq) → BaSO4(s) + H2O(l)   Br2(l) + Cl2(g) → BrCl(g)   H2SO4(aq) + KOH(aq) → K2SO4(aq) + H2O(l)   CuCl2(aq) + AgNO3(aq) → Cu(NO3)2(aq) + AgCl(s)   CuSO4(aq) + Zn(s) → Cu(s) + ZnSO4(aq)   H2O2(aq) → H2O(l) + O2(g)

Question
Asked Nov 5, 2019

Which of the following unbalanced reactions are precipitation reactions?

Select all that are True.
  Ba(OH)2(aq) + H2SO4(aq) → BaSO4(s) + H2O(l)
  Br2(l) + Cl2(g) → BrCl(g)
  H2SO4(aq) + KOH(aq) → K2SO4(aq) + H2O(l)
  CuCl2(aq) + AgNO3(aq) → Cu(NO3)2(aq) + AgCl(s)
  CuSO4(aq) + Zn(s) → Cu(s) + ZnSO4(aq)
  H2O2(aq) → H2O(l) + O2(g)

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Expert Answer

Step 1

Precipitation reactions are defined as the reactions in which an insoluble solid product is formed after the reaction of the two soluble salts.

Step 2

The reactions in which a solid product is getting formed can be identified as precipitation reactions out of the given reactions. Such reactions can be identified as,

Ba(OH)2 + H2SO4(aq) → BaSO4(s) + H2O(l)

CuCl2(aq) + AgNO3(aq) → Cu(NO3)2(aq) + AgCl(s)

CuSO4(aq) + Zn(s) → Cu(s) + ZnSO4(aq)

As all these reactions involve the formation of a solid product (BaSO4, AgCl and Cu), therefore, these reactions are the precipitation reactions out of the given reactions.

Step 3

Rest of the three reactions are given below.

Br2(l) + Cl2(g) → BrCl(g)

H2SO4(aq) + KOH(aq) → K2SO4(aq) + H2O(l)

H2O2(aq) → H2O(l) + O2(g)

These reactions involve the formation of either liquid or g...

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