Question 1

According to the solubility rules, which of the following compounds is insoluble in water?

Accepted Answer

$$\mathrm{$$BaSO_4$$}$$

Question 2

Which of the following ions will always form soluble compounds in water, with no exceptions?

Accepted Answer

$$\mathrm{NH_4$^+}$$

Question 3

A student mixes solutions of $$\mathrm{Na_2SO_4}$$ and $$\mathrm{$$BaCl_2$$}. $$What will be the visible result?

Accepted Answer

A white precipitate of $$\mathrm{$$BaSO_4$$}$$ will form.

Question 4

Which of the following best describes the term 'soluble' as used in chemistry?

Accepted Answer

A substance that can be dissolved in a solvent to form an aqueous solution.

Question 5

Which compound will be insoluble in water according to the solubility rules?

Accepted Answer

$$\mathrm{$$CaCO_3$$}$$

Question 6

A solution contains $$\mathrm{$$AgNO_3$$}$$ and $$\mathrm{NaCl}. $$What will happen when these solutions are mixed?

Accepted Answer

A precipitate of $$\mathrm{AgCl}$$ will form.

Question 7

Which of the following compounds is soluble in water?

Accepted Answer

$$\mathrm{Na_3PO_4}$$

Question 8

Which of the following best explains why $$\mathrm{Mg(OH)_2} is $$considered insoluble in water?

Accepted Answer

Hydroxides are generally insoluble except when paired with group 1A cations or $$\mathrm{NH_4$^+}.$$

Question 9

A patient is given a medication containing $$\mathrm{$$CaSO_4$$}. $$Based on solubility rules, what can you predict about its solubility in water?

Accepted Answer

It is slightly soluble (sparingly soluble).

Question 10

Which of the following combinations will result in the formation of a precipitate?

Accepted Answer

$$\mathrm{Na_2CO_3}$$ and $$\mathrm{$$CaCl_2$$}$$

Question 11

Which of the following best describes the exception to the insolubility of sulfates?

Accepted Answer

Sulfates are soluble except when paired with $$\mathrm{Ca$$^{2+}$$}$$, $$\mathrm{Ba$$^{2+}$$}$$, or $$\mathrm{Pb$$^{2+}$$}.$$

Question 12

If $$\mathrm{Pb(NO_3$)_2} is $$mixed with $$\mathrm{Na_2SO_4}$$, what is the net ionic equation for the reaction?

Accepted Answer

$$\mathrm{Pb$$^{2+}$$ (aq) + SO_4$^{2-} (aq) \rightarrow $$PbSO_4$$ (s)}$$

Question 13

Which of the following compounds will be insoluble in water?

Accepted Answer

$$\mathrm{CuS}$$

Question 14

A solution contains $$\mathrm{Ca$$^{2+}$$}$$ and $$\mathrm{PO_4$^{3-}}$$ ions. What will happen when these ions are present together in water?

Accepted Answer

A precipitate of $$\mathrm{Ca_3$(PO_4$)_2}$$ will form.

Question 15

Which of the following best explains why $$\mathrm{Na_2CO_3} is $$soluble in water?

Accepted Answer

All sodium salts are soluble.

Question 16

Which of the following compounds is insoluble in water?

Accepted Answer

$$\mathrm{Mg_3$(PO_4$)_2}$$

Question 17

A hospital laboratory is testing for the presence of chloride ions in a patient's urine sample. Which reagent would produce a visible precipitate if chloride is present?

Accepted Answer

$$\mathrm{$$AgNO_3$$}$$

Question 18

Which of the following best describes the solubility of $$\mathrm{Ca(OH)_2} in $$water?

Accepted Answer

It is slightly soluble (sparingly soluble).

Question 19

Which of the following compounds will be soluble in water?

Accepted Answer

$$\mathrm{K_2SO_4}$$

Solubility Rules and Classification of Ionic Compounds in Water

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