Question

Use the solubility rules and periodic table to predict the product that will precipitate out in the reaction

Answer 1

Answer:- E.
`BaSO_4`

Explanations:- The reactants are
`K_2SO_4` and
`Ba(NO_3)_2` and both of these are soluble. The double displacement reaction takes place in which the ion exchange takes place. sulfate ion goes to barium and nitrate ion goes to potassium and the products are
`KNO_3` and
`BaSO_4` .

Here, it could be noticed that charge for potassium is +1 and charge for barium is +2. Charge for nitrate ion is -1 and the charge for sulfate ion is -2. Nitrates ion goes with potassium ion and as they have equal charges, no subscripts are used for potassium for nitrate ion and the formula is
`KNO_3` . Similarly, barium and sulfate ion both have equal charges and so no subscripts are used neither for barium nor for sulfate and the formula is
`BaSO_4` .

Now, if we check out the solubility rules then all nitrates are soluble means potassium nitrate is soluble. Barium sulfate is insoluble. The balanced equation is:

`K_2SO_4(aq)+Ba(NO_3)_2(aq)\rightarrow 2KNO_3(aq)+BaSO_4(s)`

So, the correct option is E.
`BaSO_4` .