1. Identify each of the following substances as a strong electrolyte, weak elect

Question

1.     Identify each of the following substances as a strong electrolyte, weak electrolyte or non-electrolyte:

a.     Saline solution (NaCl solution)

b.     Distilled water

c.     Air

d.     A weak base ammonia in water

2.     Using the solubility table (Table 4.2), characterize is the following substances are soluble or insoluble in water

a.     BaSO4

b.     LiOH

c.     Ca3(PO4)2

d.     Ag2CO3

3.     Predict the products of the following reactions, write the molecular equation, ionic equation and net ionic equation. Indicate of it is a precipitation reaction or not:

a.     AgNO3(aq)   +   Na2SO4(aq)  

      b.     BaCl2(aq)   +   ZnSO4(aq)

Explanation / Answer

1)

a.     Saline solution (NaCl solution)   ---------- strong electrolyte

b.     Distilled water    --------- non electolyte

c.     Air              ------------- non electolyte

d.     A weak base ammonia in water   ---------- weak electrolyte

2)

a.     BaSO4      --------- insoluble

b.     LiOH   ------ soluble

c.     Ca3(PO4)2   -------- insoluble

d.     Ag2CO3       -------- insoluble .

3)

a.  

molecular : 2 AgNO3(aq)   +   Na2SO4(aq)      Ag2SO4 (s) + 2 NaNO3

ionic : 2 Ag+ (aq) + 2 NO3- (aq) + 2 Na+ (aq) + SO42- (aq) -----------> Ag2SO4 (s) + 2 Na+ (aq) + 2 NO3- (aq)

net ionic : 2 Ag+ (aq) + SO42- (aq) -----------> Ag2SO4 (s)

b)

BaCl2(aq)   +   ZnSO4(aq) BaSO4 (s) + ZnCl2 (aq)

Ba+2 (aq) + 2 Cl- (aq) + Zn+2 (aq) + SO42- (aq) -----------> BaSO4 (s) + Zn+2 (aq) + 2 Cl- (aq)

Ba+2 (aq) + SO42- (aq) -----------> BaSO4 (s)

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