Question 1

Which of the following best describes the reaction: $$\mathrm{C_2H_2 + O_2$ \rightarrow CO_2$ + H_2O}$$?

Accepted Answer

Combustion reaction

Question 2

Given the reaction $$\mathrm{Mg + $$AgNO_3$$ \rightarrow Mg(NO_3$)_2 + Ag}$$, what type of reaction is this?

Accepted Answer

Single-replacement

Question 3

Predict the products and balance the following reaction: $$\mathrm{Zn + $$CuSO_4$$ \rightarrow}$$

Accepted Answer

$$\mathrm{$$ZnSO_4$$ + Cu}$$

Question 4

Which of the following combinations will produce a precipitate according to solubility rules?

Accepted Answer

Mixing $$\mathrm{Na_2CO_3(aq)}$$ and $$\mathrm{$$MgCl_2$$(aq)}$$

Question 5

For the reaction $$\mathrm{K_2CO_3(aq) + $$AgNO_3$$(aq) \rightarrow}$$, what is the net ionic equation?

Accepted Answer

$$\mathrm{2Ag^+(aq) + CO_3$^{2-}(aq) \rightarrow Ag_2CO_3(s)}$$

Question 6

In the gravimetric analysis of a mixture containing $$\mathrm{$$MgCl_2$$}$$ and $$\mathrm{NaCl}$$, which reagent should be added to selectively precipitate the magnesium ion?

Accepted Answer

Aqueous $$\mathrm{Na_2CO_3}$$

Question 7

A sample containing $$7.92$$ grams of a mixture of $$\mathrm{$$MgCl_2$$}$$ and $$\mathrm{NaCl}$$ yields $$4.88$$ grams of $$\mathrm{$$MgCO_3$$}$$ precipitate after reaction with $$\mathrm{Na_2CO_3}. $$What is the number of moles of $$\mathrm{$$MgCO_3$$}$$ formed? ($$\mathrm{Molar\ mass\ of\ $$MgCO_3$$ = 84.3\ g/mol})$$

Accepted Answer

$$0.0579$$ mol

Question 8

After mixing $$\mathrm{NaOH(aq)}$$ and $$\mathrm{Fe(NO_3$)_3(aq)}$$, a precipitate forms. What is the net ionic equation for this reaction?

Accepted Answer

$$\mathrm{Fe$$^{3+}$$(aq) + 3OH^-(aq) \rightarrow Fe(OH)_3(s)}$$

Question 9

A $$250\ \mathrm{mL}$$ sample of $$\mathrm{$$FeCl_3$$(aq)} is $$treated with excess $$\mathrm{NaOH(aq)}$$ and yields $$2.23$$ grams of $$\mathrm{Fe(OH)_3}$$ precipitate. What is the molarity of $$\mathrm{$$FeCl_3$$} in $$the original solution? ($$\mathrm{Molar\ mass\ of\ Fe(OH)_3 = 106.9\ g/mol})$$

Accepted Answer

$$0.0834\ \mathrm{M}$$

Question 10

Which of the following is a correct complete ionic equation for the reaction between $$\mathrm{K_2CO_3(aq)}$$ and $$\mathrm{$$AgNO_3$$(aq)}$$?

Accepted Answer

$$\mathrm{2K^+(aq) + CO_3$^{2-}(aq) + 2Ag^+(aq) + 2NO_3^-(aq) \rightarrow 2K^+(aq) + 2NO_3^-(aq) + Ag_2CO_3(s)}$$

Question 11

In the reaction $$\mathrm{HCl(aq) + Al(OH)_3(s) \rightarrow}$$, which ions are spectator ions?

Accepted Answer

$$\mathrm{Cl^-}$$

Question 12

Which of the following best represents a decomposition reaction?

Accepted Answer

$$\mathrm{$$PbO_2$$ \rightarrow PbO + O_2$}$$

Question 13

A student mixes $$\mathrm{Na_2CO_3(aq)}$$ and $$\mathrm{$$CuSO_4$$(aq)}. $$What is the expected precipitate?

Accepted Answer

$$\mathrm{$$CuCO_3$$(s)}$$

Question 14

Which of the following is the correct balanced molecular equation for the reaction between $$\mathrm{Al}$$ and $$\mathrm{Fe_2O_3}$$?

Accepted Answer

$$\mathrm{2Al + Fe_2O_3 \rightarrow 2Fe + Al_2O_3}$$

Question 15

If $$\mathrm{Mg($$ClO_3$$)_2}$$ decomposes, what are the products?

Accepted Answer

$$\mathrm{$$MgCl_2$$ + O_2$}$$

Question 16

A mixture of $$\mathrm{NaOH(aq)}$$ and $$\mathrm{Fe(NO_3$)_3(aq)} is $$filtered after reaction. What will be present in the filtrate?

Accepted Answer

$$\mathrm{Na^+}$$ and $$\mathrm{NO_3$^-}$$ ions

Question 17

Which of the following best describes the reaction: $$\mathrm{C_8H_{18} + O_2$ \rightarrow CO_2$ + H_2O}$$?

Accepted Answer

Combustion reaction

Question 18

Which of the following is a correct net ionic equation for the reaction between $$\mathrm{HCl(aq)}$$ and $$\mathrm{Al(OH)_3(s)}$$?

Accepted Answer

$$\mathrm{3H^+(aq) + Al(OH)_3(s) \rightarrow Al$$^{3+}$$(aq) + 3H_2O(l)}$$

General Chemistry Reaction Types, Equations, and Gravimetric Analysis Study Guide

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