Solubility and Predicting Precipitates

An aqueous solution is:

• any liquid with another compound dissolved in it.

• an ionic compound with water dissolved in it.

• water with another compound dissolved in it.

• none of the above

Which of the following compounds is SOLUBLE?

• copper carbonate

• calcium carbonate

• potassium carbonate

• strontium carbonate

When solid NaCl is stirred into water, which of the following is NOT true?

• Individual sodium and chloride ions are present.

• The solution will conduct electricity.

• The solution will taste salty.

• The NaCl will fail to dissociate.

In writing the chemical equation for a precipitation reaction, what abbreviation of the physical state must appear with one of the products?

• (s)

• (g)

• (l)

• (w)

What would be the formula of the precipitate that forms when Pb(NO₃)₂ (aq) and K₂SO₄ (aq) are mixed?

• K(NO₃)₂

• PbSO₄

• PbK₂

• H₂O

Considering the following precipitation reaction:

Pb(NO₃)₂(aq) + 2KI(aq) → PbI₂(s) + 2KNO₃(aq)

Which compound would not form ions in the complete ionic equation?

• PbI2

• KNO₃

• Pb(NO₃)₂

• KI

Considering the following precipitation reaction:

Pb(NO₃)₂(aq) + 2KI(aq) → PbI₂(s) + 2KNO₃(aq)

Which ion would NOT be present in the complete ionic equation?

• Pb²⁺

• K⁺

• NO^3-

• I^-

• All the above ions are in the complete ionic equation.

Considering the following precipitation reaction:

Pb(NO₃)₂(aq) + 2KI(aq) → PbI₂(s) + 2KNO₃(aq)

What is the correct complete ionic equation?

• Pb²⁺ + (NO₃)₂^- + 2K⁺ + 2I^- → PbI₂(s) + 2K⁺ + 2NO₃^-

• Pb²⁺ + 2NO₃^- +2K⁺ + I^- → PbI₂(s) + 2K⁺ + NO₃^-

• Pb²⁺ + 2NO₃^- + 2K⁺ + 2I^- → PbI₂(s) + 2K⁺ + 2NO₃^-

• Pb²⁺ + 2NO^3- + 2K⁺ + 2I^- → Pb²⁺ + 2I^- + 2K⁺ + 2NO₃^-

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-7

Which of the following statements about writing molecular, complete and net ionic equations is FALSE?

• A molecular equation is a chemical equation showing the complete, neutral formulas for every compound in a reaction

• A complete ionic equation is a chemical equation showing all of the species as they are actually present in solution.

• A net ionic equation is an equation showing only the species that actually participate in the reaction.

• A spectator ion remains unchanged in the reaction and appears on both sides of the equation.

• All of the statements are true

Which of the following compounds is INSOLUBLE?

• magnesium phosphate

• magnesium sulfate

• magnesium iodide

• magnesium nitrate

• none of the above