Q: Given the balanced molecular equation: $$2\text{Na}_3\text{PO}_4 (aq) + 3\text{CaCl}_2 (aq) \rightarrow 6\text{NaCl} (aq) + \text{Ca}_3(\text{PO}_4)_2 (s)$$, which of the following is the correct complete ionic equation?

$$6\text{Na}^+ (aq) + 2\text{PO}_4$$^{3-}$$ (aq) + 3\text{Ca}^{2+} (aq) + 6\text{Cl}^- (aq) \rightarrow 6\text{Na}^+ (aq) + 6\text{Cl}^- (aq) + \text{Ca}_3(\text{PO}_4)_2 (s)$$

Q: What is the net ionic equation for the reaction between $$\text{CaCl}_2 (aq)$$ and $$\text{Na}_3\text{PO}_4 (aq)$$?

$$3\text{Ca}^{2+} (aq) + 2\text{PO}_4$$^{3-}$$ (aq) \rightarrow \text{Ca}_3(\text{PO}_4)_2 (s)$$

Q: Which ions are considered spectator ions in the reaction between $$\text{CaCl}_2$$ and $$\text{Na}_3\text{PO}_4$$?

$$\text{Na}^+$$ and $$\text{Cl}^-$$

Q: A chemist mixes copper(II) bromide and lithium hydroxide in water. What is the net ionic equation for the reaction?

$$\text{Cu}^{2+} (aq) + 2\text{OH}^- (aq) \rightarrow \text{Cu(OH)}_2 (s)$$

Question 1

Which of the following best describes a complete ionic equation?

Accepted Answer

An equation that shows all strong electrolytes as dissociated ions.

Question 2

Given the balanced molecular equation: $$2	ext{Na}_3	ext{PO}_4 (aq) + 3	ext{CaCl}_2 (aq) ightarrow 6	ext{NaCl} (aq) + 	ext{Ca}_3(	ext{PO}_4)_2 (s)$$, which of the following is the correct complete ionic equation?

Accepted Answer

$$6	ext{Na}^+ (aq) + 2	ext{PO}_4$$^{3-}$$ (aq) + 3	ext{Ca}^{2+} (aq) + 6	ext{Cl}^- (aq) ightarrow 6	ext{Na}^+ (aq) + 6	ext{Cl}^- (aq) + 	ext{Ca}_3(	ext{PO}_4)_2 (s)$$

Question 3

What is the net ionic equation for the reaction between $$	ext{CaCl}_2 (aq)$$ and $$	ext{Na}_3	ext{PO}_4 (aq)$$?

Accepted Answer

$$3	ext{Ca}^{2+} (aq) + 2	ext{PO}_4$$^{3-}$$ (aq) ightarrow 	ext{Ca}_3(	ext{PO}_4)_2 (s)$$

Question 4

Which ions are considered spectator ions in the reaction between $$	ext{CaCl}_2$$ and $$	ext{Na}_3	ext{PO}_4$$?

Accepted Answer

$$	ext{Na}^+$$ and $$	ext{Cl}^-$$

Question 5

A solution contains magnesium nitrate and cesium hydroxide. Which reagent could be used to separate the two ions?

Accepted Answer

$$	ext{NaOH}$$

Question 6

Which of the following reagents could be used to separate the two cations from a solution containing Lead (IV) acetate and cesium permanganate?

Accepted Answer

$$	ext{TCH}_4	ext{O}$$

Question 7

When writing a complete ionic equation, which compounds should be broken up into their respective ions?

Accepted Answer

All soluble ionic compounds and strong acids.

Question 8

Why are spectator ions omitted from the net ionic equation?

Accepted Answer

They do not participate in the chemical reaction.

Question 9

Which of the following is a correct step in converting a balanced molecular equation to a net ionic equation?

Accepted Answer

Cancel out the spectator ions from both sides of the complete ionic equation.

Question 10

A chemist mixes copper(II) bromide and lithium hydroxide in water. What is the net ionic equation for the reaction?

Accepted Answer

$$	ext{Cu}^{2+} (aq) + 2	ext{OH}^- (aq) ightarrow 	ext{Cu(OH)}_2 (s)$$

Question 11

Which of the following best explains why $$	ext{Ca}_3(	ext{PO}_4)_2$$ forms a precipitate in aqueous solution?

Accepted Answer

It is insoluble in water.

Question 12

In a precipitation reaction, what is the driving force for the reaction to occur?

Accepted Answer

Formation of an insoluble solid.

Complete Ionic Equations and Net Ionic Equations

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