Explain the observations obtained from the following experiments. Write the balanced equations involved.(i) Anhydrous beryllium chloride is exposed to moist air; sodium hydroxide is then added to...

Explain the observations obtained from the following experiments. Write the balanced equations involved.(i) Anhydrous beryllium chloride is exposed to moist air; sodium hydroxide is then added to the solution. (ii) Aqueous sodium iodide is reacted with aqueous silver nitrate; aqueous ammonia is then added to the solution.
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jerichorayel eNotes educator| Certified Educator

ii. When anhydrous Beryllium chloride is exposed to air, it readily forms Beryllium hydroxide. The equation would be:

BeCl2 + 2H2O --> Be(OH)2 + 2 HCl

**H2O is the water in the air.

Now the solution will now be acidic so upon the addition of Sodium Hydroxide, the reaction will be neutralized. The neutralization equation is:

HCl + NaOH --> NaCl + H2O

 

ii. The reaction of Sodium iodide with Silver nitrate will produce a precipitate. The reaction equation can be written as:

NaI (aq) + AgNO3 (aq) ---> NaNO3 (aq) + AgI (s)

AgI is the precipitate in the solution.

When aqueous Ammonia is added, no visible changes will occur since ammonia cannot dissolve the precipitate AgI in the solution.