Question

You have plenty of salts that are in front of you and you are trying to figure out which salts are soluble in water, and which ones of their products are soluble in water. For the following equation, identify which reactants and products are soluble/insoluble in water. PbSO4 + KF =

Answer 1

So,

First of all, we should remember what the solubility rules are.

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The following complete reaction is given in our problem:

`PbSO_4+2KF\to K_2SO_4+PbF_2`

We're going to analyze each compound and check its solubility.

Let's begin with PbSO4:

If you see the rule number 4, all compounds containing sulfate (SO4) are soluble, except those of lead (Pb).

So, the compound PbSO4 is not soluble in water.

Let's see KF:

If you see the rule number 1, all common salts of the group 1A elements are soluble.

So, KF is soluble in water.

Let's see K2SO4 now:

If you look at the rule number 4, all compounds containing sulfate (SO4) are soluble. Since "K" doesn't belong to the exceptions group, we can say that:

K2SO4 is soluble in water.

And finally, let's analyze the compound PbF2:

If we notice, all Fluorides are soluble except if those of lead, so,

PbF2 is not soluble in water.