Presentation on theme: "Single Replacement Reactions. Understand this first! Writing formulas for compounds -Ex. Al 2 O 3 (Balancing positive and negative charge) Balancing equations."— Presentation transcript:
Understand this first! Writing formulas for compounds -Ex. Al 2 O 3 (Balancing positive and negative charge) Balancing equations (7.4) HONClBrIF
Understanding Single Replacement Single-Replacement Reaction: Atoms of an element replace the atoms of a second element in a compound Activity Series of Metals: A list of metals on order of decreasing reactivity (S) (L) (G) (aq) Solid, Liquid, Gas, Dissolved in water A + BC B + AC Think of it like this!
How to understand the tab le In both the tables shown the highest element is able to knock out any other elements below it. The ones below it are unable to knock out the ones above it. F can knock out Cl, Br, I, and At but they cant knock out F. Li can knock out K, Ca, Na, Mg, Al, Zn, Fe, Pb, H, Cu, Hg, Ag but they cant knock out K.
Using the table 1)Check if element will replace the other element in the compound 2)If the isolated element is greater than the element in the compound, then it will replace the lower element in the equation 3)If you get an unbalanced equation thats where chapter 7.4 comes in, in order to balance out the equation
Practice Problems Zn (s) + H 2 S0 4 (aq) ZnSO 4(aq) + H 2(g)
Practice Problems Zn (s) + H 2 S0 4 (aq) ZnSO 4(aq) + H 2(g) Zn has a +2 charge and so does H 2 Zn replaces H without balancing needed
Practice problems Al(NO 3 ) 3 +Mg Mg(NO 3 ) 2 + Al Unbalanced In Al(NO 3 ) 3 = three of NO3 In (NO 3 ) 2 = two of NO3 To get them the same of NO3 you need to put them to a common quantity (which is six) 2Al(NO 3 ) 3 +3Mg 3Mg(NO 3 ) 2 + 2Al Balanced Mg(NO 3 ) 2 + Al Unbalanced
Practice Problems Cl 2 + 2NaI I 2 + 2NaCl Cl is greater than I so its replaces it Beware of HONClBrIF when that element is alone it has 2
Practice Problems Cl 2 + 2NaI I 2 + 2NaCl Cl is greater than I so its replaces it Beware of HONClBrIF when that element is alone it has 2 To balance you put 2 NaI and 2 NaCl because there is 2 Cl in the first equation and 2 I in the second. And you have to balance the NaI and NaCl so that both sides have Cl 2 and I 2
Practice Problems Ag (s) + KNO 3(ag) No Reaction (NR) Ag is lower on the chart than K so it cant replace it No Reaction (NR)
Homework Solve by single replacement to the balanced form 1.Al + CuCl 2 2.Br 2 + CaI 2 3.Cu + FeSO 4