Unit 4: Chemical Reactions

Classifying Rxns

100

The type of reaction that involves one reactant breaking down into two or more products

Decomposition

200

Classify the following reaction: 2 H2 + O2 --> 2 H2O

Synthesis

300

All combustion reactions involve _____________ in the reactants and produce _______________________.

Oxygen gas Carbon dioxide and water

400

Classify the following reactions 1) 2 Al + Fe3N2 --> 2 AlN + 3Fe 2) CaCO3 + H3PO4 --> Ca3(PO4)2 + 3 H2CO3 3) C3H8 + 5 O2 --> CO2 + H2O 4) 3 KBr + Fe(OH)3 --> 3 KOH + FeBr3

1) Single Replacement 2) Double Replacement 3) Combustion 4) Double Replacement

500

Correctly write and classify the following reactions 1) Sodium and chlorine gas react to form sodium chloride 2) Silver nitrate and solid nickel react to form nickel (II) nitrate and silver 3) Sodium carbonate and potassium fluoride react to form sodium fluoride and potassium carbonate

1) 2 Na + Cl2 --> 2 NaCl (Synthesis) 2) 2 AgNO3 + Ni --> Ni(NO3)2 + 2 Ag (Single Replacement) 3) Na2CO3 + 2 KF --> 2 NaF + K2CO3 (Double Replacement)

Balancing Equations

100

Chemical equations must be balanced to satisfy the ___________

The law of conservation of matter/mass

200

Write the following equation in words, interpreting the coefficients and representative particles 4 NaI + Pb(SO4)2 --> PbI4 + 2 Na2SO4

4 formula units of sodium iodide reaction with 1 formula unit of lead sulfate to make 1 formula unit of lead (IV) iodide and 2 formula units of sodium sulfate

300

Balance the following equation KNO3 + H2CO3 --> K2CO3 + HNO3

2 KNO3 + H2CO3 --> K2CO3 + 2 HNO3

400

Write and balance the following reactions 1) Calcium and hydrochloric acid react to form calcium chloride and hydrogen gas 2) Silver fluoride reacts with nickel (II) chloride to form silver chloride and nickel (II) fluoride

1) Ca + 2 HCl --> CaCl2 + H2 2) 2 AgF + NiCl2 --> 2 AgCl + NiF2

500

Balance the following equations 1) C3H8 + O2 --> CO2 + H2O 2) ZnS + AlP --> Zn3P2 + Al2S3 3) (NH4)3PO4 + Pb(NO3)4 --> Pb3(PO4)4 + NH4NO3 4) NO2 --> O2 + N2

1) C3H8 + 5 O2 --> 3 CO2 + 4 H2O 2) 3 ZnS + 2 AlP --> Zn3P2 + Al2S3 3) 4 (NH4)3PO4 + 3 Pb(NO3)4 --> Pb3(PO4)4 + 12 NH4NO3 4) 2 NO2 --> 2 O2 + N2

Single Replacement

100

Single replacement reactions involve a free _____ and an __________ ___________ __________

Single replacement reactions involve a free metal and an aqueous ionic compound

200

Which of the following is the most reactive metal? Least reactive? Tin Lead Cobalt Copper Silver Nickel

Most: Cobalt Least: Silver

300

Can the following reaction occur? If so, finish the equation: Ni + Cu(NO3)2 -->

Yes; Ni + Cu(NO3)2 --> Ni(NO3)2 + Cu

400

Complete the following reactions. If the reaction will not occur, write NR. 1) Ag + HCl --> 2) Al + Zn(NO3)2 --> 3) AgNO3 + Ni -->

1) NR 2) 2 Al + Zn(NO3)2 --> 2 AlNO3 + Zn 3) 2 AgNO3 + Ni --> Ni(NO3)2 + 2 Ag

500

Predict if the following reactions will occur. If so, write the complete equation. 1) Copper and Silver Nitrate 2) Nickel and Iron (II) Nitrate 3) Aluminum and Hydrochloric Acid

1) Cu + 2 AgNO3 --> Cu(NO3)2 + 2 Ag 2) NR (iron is more reactive than nickel) 3) 2 Al + 6 HCl --> 2 AlCl3 + 3 H2

Double Replacement

100

Double Replacement reactions involve what type of substances?

Aqueous ionic compounds

200

What property of ionic compounds allow double replacement reactions to occur?

They dissociate in water

300

Determine if the following substances are soluble or insoluble 1) Ca3(PO4)2 2) CaCl2 3) Zn(NO3)2

1) insoluble 2) soluble 3) soluble

400

Predict if the following reactions will take place. If so, complete the reaction and write the complete equation (included states of matter) 1) AgF + NiCl2 --> 2) Na2CO3 + KF --> 3) Na3PO4 + CaCl2 -->

1) 2 AgF(aq)+ NiCl2(aq) --> 2 AgCl(s) + NiF2(aq) 2) NR 3) 2 Na3PO4 + 3 CaCl2 --> Ca3(PO4) 2 + 6 NaCl

500

Predict if the following reactions will take place. If so, complete the reaction and write the complete equation (included states of matter) 1) Sodium phosphate and calcium hydroxide 2) Sodium iodide and calcium chloride 3) Lead (II) Nitrate and Potassium Sulfate

1) Na2PO4 (aq) + Ca(OH)2 (aq) --> 2 NaOH (aq) + CaPO4 (s) 2) NaI + CaCl2 --> NR 3) Pb(NO3)2(aq) + K2S(aq) --> PbS(s) + 2 KNO3(aq)

Miscellaneous

100

Which of the following is always conserved in a chemical reaction? A. Mass and Molecules B. Atoms and Molecules C. Metals and Atoms D. Atoms and Mass

D. Atoms and Mass

200

How many molecules of carbon dioxide gas are in 65.5 L at STP?

1.76 x 10^24 molecules CO2

300

Write the following equation, then find the total molar mass of the products: Zinc and lead (II) nitrate react to form Zinc nitrate and lead

Zn + Pb(NO3)2 --> Zn(NO3)2 + Pb 189.41 g/mol + 207.2 g/mol = 396.61 g/mol

400

How many grams are in 4.25 x 10^22 formula units of Aluminum Bromide?

18.83 g AlBr3

500

Write the correct equations then write the net ionic equations 1) Sodium phosphate and calcium chloride 2) Sodium hydroxide and calcium bromide

1) 2 Na3PO4(aq) + 3 CaCl2(aq) --> 6 NaCl (aq) + Ca3(PO4)2(s) 3Ca2+ + 2 PO42- --> Ca3(PO4)2 2) 2 NaOH + CaBr2 --> 2 NaBr + Ca(OH)2 2OH- + Ca + --> Ca(OH)2