catalyst – march 17 th 2010
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Catalyst – March 17 th 2010. List 2 characteristics of combustion reactions. What is the general equation for a synthesis reaction? What do you think the products of the following decomposition reaction are: CaO ? + ?. Today’s Agenda. Catalyst Homework Review - PowerPoint PPT PresentationTRANSCRIPT
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Catalyst – March 17th 2010
1. List 2 characteristics of combustion reactions.
2. What is the general equation for a synthesis reaction?
3. What do you think the products of the following decomposition reaction are:
CaO ? + ?
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Today’s Agenda
Catalyst Homework Review Chemistry Prom 2009 Day 2! Practice and Work Time GEE PREP Exit Question
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Today’s Objectives
SWBAT predict the products of single-replacement and double-replacement reactions.
SWBAT differentiate between single-replacement and double-replacement reactions.
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Single and Double Replacement
Reactions
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Drama on the Dance Flo!
Key Point #1: A SINGLE-REPLACEMENT REACTION is one in which a single element replaces a similar element in a compound
A + BX AX + B A couple is dancing, and someone
else cuts in
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Single-Replacement in Action
Example: Zn + CuCl2
ZnClCl Cu +
A + BX AX + B
ClCl Zn Cu+
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Single-Replacement Practice
1. Predict the products of the reaction between solid copper and silver (I) nitrate.
Write the reactants first.Then, write the products.
Ag + Cu(NO3)2
Cu + AgNO3 Must Kriss
Kross to get the correct formulas!
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Reactivity in the mix!
Will a single-replacement reaction ALWAYS take place?
Will there ALWAYS be cut-in drama on the dance flo?
No, you have to check the reactivity series of metals and halogens
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Reactivity in the mix!
A metal will NOT ALWAYS replace another metal in a compound
Reactivity is a substance’s ability to react with another substance
The most active metals are on the top of the list on page 288
More active metals will replace less active metals Example: Ag (s) + Cu(NO3)2 (aq) NO
RXN!
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Metals near the top are most reactive and will displacing metals near the bottom.
Q: Which of these will react?
1. Fe + CuSO4 2. Ni + NaCl 3. Li + ZnCO3 4. Al + CuCl2
Cu + Fe2(SO4)3Yes, Fe is
above CuNR (no reaction)
No, Ni is below Na
Zn + Li2CO3Cu + AlCl3
Yes, Al is above Cu
KNaLiCaMgAlZnFeNiSnPbHCuHgAgAu
Yes, Li is above Zn
Reactivity Series
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Reactivity of Halogens
The same goes for halogens More active halogens will replace less
active halogens List also on page 288 Q: Which of these will react?
F2 (g) + 2 NaBr (aq)
I2 (g) + 2 KCl (aq)
F
Cl
Br
I
Yes, F is above Br
2 NaF (aq) + Br2 (l)
NR (no reaction)
No, I is below Cl
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Example Problem 10-2
Write down the following reactants. Then, predict the products of the reactions.
1. Fe (s) + CuSO4 (aq)
2. Br2 (l) + MgCl2 (aq)
3. Mg (s) + AlCl3 (aq)
KNaLiCaMgAlZnFeNiSnPbHCuHgAgAu
F
Cl
Br
I
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Swing Fever!
Key Point #2: A DOUBLE-REPLACEMENT REACTION is one in which ions switch places. You must KRISS-KROSS to write ALL formulas!
AX + BY AY + BX Two couples are dancing and decide to
switch partners!
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Double-Replacement in Action
Example: MgO + CaS
AX + BY AY + BX
SOMg Ca
+O S
Mg Ca+
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Double-Replacement Practice
1. Predict the products of the reaction between silver (I) nitrate and lithium iodide.
Write the reactants first.Then, write the products.
LiNO3 + AgIAgNO3 + LiI Must Kriss
Kross to get the correct formulas!
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Let’s think about the positive and the negative…cations and anions
AX + BY AY + BX
A and B are cations (positively charged)X and Y are anions (negatively charged)
You can see the anions have switched places andare now bonded to the other cations in the
reaction
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PRACTICE!
Worksheet!
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Exit Question
1. What are the 4 types of chemical reactions we have learned about so far at Chemistry Prom?
2. Will the following reaction occur? Why or why not?
Ni + AuBr3 NiBr2 + Au