Question 1

Which of the following correctly represents the balanced molecular equation for the reaction between lithium hydroxide and copper(II) chloride in aqueous solution?

Accepted Answer

$$2\ \mathrm{LiOH}_{(aq)} + \mathrm{CuCl}_2_{(aq)} \rightarrow 2\ \mathrm{LiCl}_{(aq)} + \mathrm{Cu(OH)}_2_{(s)}$$

Question 2

What type of reaction occurs when $$\mathrm{LiOH}_{(aq)}$$ reacts with $$\mathrm{CuCl}_2_{(aq)}$$?

Accepted Answer

Double displacement (precipitation) reaction

Question 3

Which product forms as a precipitate in the reaction between $$\mathrm{LiOH}_{(aq)}$$ and $$\mathrm{CuCl}_2_{(aq)}$$?

Accepted Answer

$$\mathrm{Cu(OH)}_2_{(s)}$$

Question 4

Predict the products and state if a reaction occurs when $$\mathrm{Ca(NO_3$)_2}_{(aq)} is $$mixed with $$\mathrm{BaS}_{(aq)}.$$

Accepted Answer

No reaction

Question 5

Which of the following best explains why there is no reaction between $$\mathrm{Ca(NO_3$)_2}_{(aq)}$$ and $$\mathrm{BaS}_{(aq)}$$?

Accepted Answer

All possible products are soluble in water

Question 6

If $$\mathrm{Cu(OH)_2} is $$formed as a product in a reaction, what is its physical state under standard conditions?

Accepted Answer

Solid

Question 7

Which of the following net ionic equations correctly represents the precipitation reaction between $$\mathrm{LiOH}_{(aq)}$$ and $$\mathrm{CuCl}_2_{(aq)}$$?

Accepted Answer

$$\mathrm{Cu}^{2+}_{(aq)} + 2\ \mathrm{OH}^-_{(aq)} \rightarrow \mathrm{Cu(OH)}_2_{(s)}$$

Question 8

Which of the following statements is true regarding the solubility of $$\mathrm{LiCl}$$ and $$\mathrm{Cu(OH)_2} in $$water?

Accepted Answer

$$\mathrm{LiCl} is $$soluble, $$\mathrm{Cu(OH)_2} is $$insoluble

Question 9

A student mixes $$\mathrm{Ca(NO_3$)_2}_{(aq)}$$ and $$\mathrm{BaS}_{(aq)} in a $$test tube. What observation should the student expect?

Accepted Answer

No visible change

Question 10

Which of the following best describes a double displacement reaction?

Accepted Answer

Two compounds exchange ions to form two new compounds

Question 11

Given the reaction $$2\ \mathrm{LiOH}_{(aq)} + \mathrm{CuCl}_2_{(aq)} \rightarrow 2\ \mathrm{LiCl}_{(aq)} + \mathrm{Cu(OH)}_2_{(s)}$$, which ion acts as the spectator ion?

Accepted Answer

$$\mathrm{Li}^+$$

Question 12

Which of the following is a correct balanced equation for a reaction that produces a precipitate?

Accepted Answer

$$2\ \mathrm{LiOH}_{(aq)} + \mathrm{CuCl}_2_{(aq)} \rightarrow 2\ \mathrm{LiCl}_{(aq)} + \mathrm{Cu(OH)}_2_{(s)}$$

Predicting and Balancing Double Displacement Reactions

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