Catalyst Classify the following reaction types: – CH 4 + O 2  H 2 O + CO 2 – H 2 + O 2  H 2 O

Predicting Products

Review: Finding Charges S and P block elements: use the group (column) Polyatomic ions (NO 3 ): use cheat sheet Transition metals: reverse Kriss - Kross K + AgNO 3 -> KNO 3 + Ag

Review: Finding Charges S and P block elements: use the group (column) Polyatomic ions: use cheat sheet Transition metals: reverse Kriss - Kross NaCl + AgNO 3 -> NaNO 3 + AgCl

Reaction Type: Combination Two elements combine to form a compound A + B -> AB

Predicting the Products of a combination reaction Use balance of charges (kriss kross) for the two elements, ignoring reactant subscripts Na + Cl 2 -> _______________ Ignore this! Na + Cl - NaCl

It doesn’t matter if it comes in as O 2. Kriss Kross its charge just like O. Na (s) and O 2(g) -> _____________

Practice part A: 2 minutes Assume Fe (s) is Iron (III)

Reaction Type: Single Replacement An element replaces another element in a compound A + BX -> AX + B Identify the charges. The single element will replace the element with like charge IF it is more active

Practice Zn (s) + CuSO 4(aq) -> _______ Zn (s) + KCl (aq) -> _________

A + BX -> AX + B Identify the charges. The single element will replace the element with like charge IF it is more active (higher in activity series) Cu + Ag 2 O -> __________ Cu + Ag 2 O -> CuO + Ag

Activity Series Says which elements are “more active” and can replace others in single replacement. Can it happen? Cu + Ag 2 O -> CuO + Ag (YES) Ag + CuO -> No Reaction because Ag is less active than Cu

Practice Zn (s) + CuSO 4(aq) -> ZnSO 4 + Cu Zn (s) + KCl (aq) -> NO RXN

More Examples: NiSO 4 + Li -> Ca(OH) 2 + Fe ->

More Examples: NiSO 4 + Li -> Li 2 SO 4 + Ni Ca(OH) 2 + Fe -> NO REACTION

Practice Part B: 9 minutes 1.Check to see if the single reactant is higher in the activity series 2.If so, it replaces the ion of like charge 3.Kriss Kross

Reaction type: Double Replacement AB + CD -> AD + CB The cations and anions from two compounds switch partners NaBr + Ca(OH) 2  _______________ Identify the charges first: NaBr + Ca(OH) 2  _______________ Like charges replace each other. NaBr + Ca(OH) 2  NaOH + CaBr

Examples of Double Replacement NaNO 3 + KCl �  __________________ AgNO 3 + Na 3 PO 4  __________________

Practice Part C: 16 minutes

Reaction Type: Combustion A substance reacts with oxygen, releasing energy (Fire!) Hydrocarbons always combust to make CO 2 and H 2 O: C x H y + O 2 -> CO 2 + H 2 O Other substance are usually combination C + O 2 -> CO 2

Practice Part D: 5 minutes

Exit Question

Predict the Products: Na 2 O + CaCl 2 -> _______________