R-1 Reactions Flashcards Preview

Wenger - AP Chemistry > R-1 Reactions > Flashcards

Flashcards in R-1 Reactions Deck (27):
1

Identify the following type of reaction

AB ⇒ A + B

Decomposition

2

Identify the following type of reaction

AB + C ⇒ AC + B

Single Replacement

3

Identify the following type of reaction

AB (aq) + CD (aq) ⇒ AD (s) + CB (aq)

Double Replacement or metathesis that forms a precipitate

4

Identify the following type of reaction

AOH (aq) + HB (aq) ⇒ AB (aq) + H2O (l)

Double Replacement or metathesis-neutralization

5

Identify the following type of reaction

A + B ⇒ AB

Synthesis

6

Identify the following type of reaction

CxHy + O2 ⇒ CO2 + H2O

Combustion of a hydrocarbon

7

Identify the following type of reaction

2 NaO (s) + H2O (l) ⇒ 2 NaOH (aq)

Synthesis but also a metal oxide in water

8

Identify the following type of reaction

SO3 (g) + H2O (l) ⇒ H2SO4 (aq)

Synthesis but also a non metal oxide in water.

Notice: The sulfur has a +6 oxidation number as a reactant and a product.

9

Identify the following type of reaction

Na2SO3 (aq) + 2 HCl (aq) ⇒ 2 NaCl (aq) + SO2 (g) + H2O (l)

Metathesis reaction that produces a gas

Note: Carbonate/bicarbonates with an acid make CO2 and H2O

Note: Sulfites and an acid make SO2 and H2O

Note: Ammonium ions and hydroxide makes NH3 and H2O

 

10

Identify the following type of reaction

2 NaCl (aq) + F2 (g) ⇒ 2 NaF (aq) + Cl2 (g)

Single Replacement (anionic)

 

11

Identify the following type of reaction

NaCl (aq) + Li (s) ⇒ Na (s) + LiCl (g)

Single Replacement (cationic)

 

12

Identify the following type of reaction

Li2SO4 (aq) + Pb(NO3)2 (aq) ⇒ 2 LiNO3 + PbSO4 (s)

Double Replacement (Precipitation)

 

13

Identify the following type of reaction

C (s) + O2 (g) ⇒ CO2 (g)

Synthesis

 

14

Identify the following type of reaction

2 CaO (s) ⇒ 2 Ca (s) + O2 (g)

Decomposition

 

15

Identify the following type of reaction

2 C2H2 (g) + 5 O2 (g) ⇒ 4 CO2 (g) + 2 H2O (g)

Combustion of a hydrocarbon

 

16

What is wrong with the way the following reaction is written?

4 H2 (g) + 2 O2 (g) ⇒ 4 H2O (l)

 

Reactions are written in lowest whole number form

2 H2 (g) + O2 (g) ⇒ 2 H2O (l)

 

17

What is wrong with the way the following reaction is written?

2 KBr (aq) + Cl2 (g) ⇒ 2 KCl (aq) + 2Br (l)

 

Bromine is diatomic

 

 

18

What is wrong with the way the following reaction is written?

2 KBr (aq) + Cl2 (g) ⇒ 2 K (s) + 2 BrCl (aq)

 

This is anionic single replacement so the anion switch places.  The K combines with the Cl.

 

 

19

What is wrong with the way the following reaction is written?

3 CuCl2 (aq) + 2 Al3+ (s) ⇒ 2 AlCl3 (aq) + 3 Cu2+ (s)

 

Metals do not have a charge unless they dissociated.  Both the elemental forms of Cu and the Al do not have a charge.

 

20

What is wrong with the way the following reaction is written?

CH4 (g) + O2 (g) ⇒ CO2 (g) + 2 H2 (g)

 

This is combustion of a hydrocarbon reaction, not a single replacement reaction.

 

21

What is wrong with the way the following reaction is written?

2 NaCl (aq) + Pb(NO3)2 (aq) ⇒ 2 NaNO3 (aq) + PbCl (s)

 

The reaction is not balanced and the charge of of the lead ion needs to be +2 in the lead chloride since it is +2 in the lead (II) nitrate in the reactants.

 

22

What is wrong with the way the following reaction is written?

NaCl (aq) + AgNO3 (aq) ⇒ NaAg (s) + ClNO3 (aq)

 

The positive silver ion should combine with the negative chloride ion to form a precipitate and the positive sodium ion should combine with the negative nitrate ion.

23

What is wrong with the way the following reaction is written?

SO2 (g) + H20 (l) ⇒ H2SO4 (aq)

 

The reaction is not balanced and the oxidation number of the sulfur atom in the reactants is +4 while it is +6 in the products.  The oxidation number should be the same for a nonmetal oxide in water so the product should be H2SO3 (aq)

24

What is wrong with the way the following reaction is written?

CaO (s) + H2O (l) ⇒ CaH2 (aq) + O2 (g)

 

This is a metal oxide in water so the product should be a hydroxide, Ca(OH)2

25

What is wrong with the way the following reaction is written?

MgCO3 (s) + 2 HCl (aq) ⇒ MgCl2 (aq) + H2CO3 (aq)

 

Carbonates and an acid will form CO2 and H2O so the products should be MgCl2 + CO2 + H2O. 

Note:  Bicarbonates and acis do the same thing

Note: Sulfites and acids become SO2 and H2O.

Note: Ammonium ion and hydroxide becomes ammonia and water

26

What is wrong with the way the following reaction is written?

3 Ag (s) + N (g) ⇒ Ag3N (s)

 

Nitrogen gas is diatomic so it should be written as N2

27

What is wrong with the way the following reaction is written?

2 AlO (s) ⇒ 2 Al (s) + O2 (g)

 

AlO should be Al2O3 since Al has a +3 charge and O has a -2 charge.