Question

What would be observed in the addition of barium nitrate to magnesium sulfate? What about for barium nitrate and postassium iodide?

Answer 1

Macroscopic changes depend on solubility equilibria.

Explanation:

Barium nitrate and magnesium sulfate:

`Ba(NO_3)_2(aq) + MgSO_4(aq) rarr BaSO_4(s)darr + Mg(NO_3)_2(aq)`

Barium sulfate is quite insoluble in water. A white solid precipitates.

Barium nitrate and potassium iodide:

Both metathesis products, `BaI_2` and `KNO_3` are soluble species. Nitrates tend to be soluble. So no macroscopic change.

Lead nitrate and barium nitrate: no macroscopic change.