Displacement Reactions Words for your glossary: Single displacement Metal activity series Halogen activity series Double displacement 7f9to&feature=fvwrel 7f9to&feature=fvwrel

Single Displacement Reactions A metal can replace a metal (+) OR a nonmetal can replace a nonmetal (-). ____________________________________________ A + BC  AC + B (if A is a metal) OR A + BC  BA + C (if A is a nonmetal) (remember the cation always goes first!) When H 2 O splits into ions, it splits into H + and OH - (not H+ and O -2 !!)

Single Displacement Reactions A metal replacing a metal cation in a compound: ________________________ Zn (s) + Fe(NO 3 )(aq)  Zn(NO 3 ) 2(aq) + Fe 2(s) A non-metal (usually a halogen) replacing an anion in a compound: ___________________ Cl 2 (g) + CaBr 2 (aq)  CaCl 2 (aq) + Br 2 (l)

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Single Displacement Reactions

When analyzing single displacement reactions, use the following guidelines:

Single Replacement Reactions Write and balance the following single replacement reaction equation: Zinc metal reacts with aqueous hydrochloric acid Note: Zinc replaces the hydrogen ion in the reaction In the case with HCl, we will treat H as a metal.

Single Replacement Reactions Sodium chloride solid reacts with fluorine gas Aluminum metal reacts with aqueous copper (II) nitrate

The Metal Activity Series pp.130 in text

The Metal Activity Series Look at table 4.2 on pp. 130 Most reactive metals are at the top Least reactive metals are at the bottom

Will there be a reaction? Using table 4.2, predict whether or not a reaction will occur in the following examples (if there is a reaction, finish and balance it): Cu + MgSO 4  Zn + FeCl 2  Al + H 2 SO 4  Fe + Al 2 (SO 4 ) 3 

Single Displacement Reactions Involving Halogens The activity series for halogens directly mirrors the position of the halogens on the periodic table: ______________________ Same rules apply, you can use this series to predict whether substances will undergo a single displacement reaction. Eg. Pp. 131 in text.

Double Displacement Reactions Double Displacement Reactions: Compound + compound  compound+ compound __________________

Double Replacement Reactions Think about it like “foil”ing in algebra, ___________ _______________________________________ Example: AgNO 3(aq) + NaCl (s)  AgCl (s) + NaNO 3(aq) Another example: K 2 SO 4(aq) + Ba(NO 3 ) 2(aq)  KNO 3(aq) + BaSO 4(s)

Double Displacement Reactions Exchange of cations Eg. Fig 4.14 in text pp. 132 Tend to occur in aqueous solutions ______________________________________ A gas is produced Some form a molecular compound such as water.

You need to think about two things with DDR BaCl 2 (aq) + K 2 SO 4 (aq)  1. How will you determine the products? 2. Which of the products, if any, will precipitate out of solution? In this course you will be given solubility, therefore, those elements that are INSOLUBLE will precipitate out. Let’s look at the example on pp. 133 Pp. 134 #25 a+d only

Lesson #13 - Review of Reactions

Predicting Chemical Reactions 1. When solid potassium chlorate is heated strongly, it decomposes into solid potassium chloride and oxygen. 2. Aqueous solutions of barium chloride and sodium carbonate react to produce barium carbonate (ppt) and sodium chloride, which dissolves in water.

Predicting Chemical Reactions A piece of Mg displaces the lead in (aq) lead (II) nitrate to produce (aq) magnesium nitrate and solid lead. Hydrogen sulfate (sulfuric acid) and sodium hydroxide, both (aq), react to produce water and sodium sulfate, which dissolves in water.

Predicting Chemical Reactions 1. Decomposition reaction: hydrogen chloride  2. Double displacement reaction: iron (III) chloride + sodium hydroxide  3. Single displacement reaction: zinc + copper (II) nitrate  4. Synthesis reaction: aluminum + bromine  5. Single displacement reaction: magnesium + hydrogen sulfate (sulfuric acid) 

Homework + Test Prep Do remaining questions on pp. 39 of the green book. Do all three Self-Checks Do the readings + all questions from REVIEW OF SC 4.2 pp in the green book. Wed = LAB You will hand it in after the lab so NO HOMEWORK, you will only have to study for the TEST!