Chemistry Brooks

TODAYS NOTES

STEPS:

1.  Identify the type ofreaction (Rxn)

2.  Put the products together

3.  Put in subscripts inproducts

4.  Balance the equation

Completeand balance the equations

Problem: Ca + F₂ ---à

Step1: Synthesis Type Reaction

Step2: Ca + F₂ ---à CaF

Step3: Ca + F₂ ---à CaF₂

Step4: 1 Ca + F₂ ---à 1 CaF₂

Problem: V(OH)₅  ---à

Step1: Decomposition

Step2: V(OH)₅  ---àVO + 5H2O

Step3: V(OH)₅  ---àV₂O₅ + 5H₂O

Step4: 2 V(OH)₅  ---àV₂O₅ + 5H₂O

Problem: H₃PO₄+ Mg(OH)₂ --à

Step1: Double Replacement: Acid Base

Step2: H₃PO₄ + Mg(OH)₂ --à Mg (PO₄) + HOH

Step3: H₃PO₄ + Mg(OH)₂ --à Mg3 (PO₄)₂ + HOH

Step4: 2 H₃PO₄ + Mg(OH)₂ --à Mg3 (PO₄)₂ + 6 HOH

Problem: Bi2(SO4)5 + Ga --à

Step1: Single Replacement Reaction

Step2: Bi2(SO4)5 + Ga --à Ga(SO4) + Bi

Step3: Bi2(SO4)5 + Ga --à Ga2(SO4)3 + Bi

Step4: 3Bi2(SO4)5 + 10Ga --à 5Ga2(SO4)3 + 6Bi

Problem: C₄H7O2 +O2 --à

Step1: Combustion (carbohydrate)

Step2 C₄H₇O2 + O₂ --à CO₂ + H₂O

Step3: C₄H₇O2 + O₂ --à CO₂ + H₂O

Step4 4C₄H7O2 + 19O2 --à 16CO₂ + 14H₂O

Problem: Ca(NO3)2 + Zn --à

Step1: Single Replacement Reaction

Step2: Because Zn is below Ca on the Activity Series

Sumof the coefficients: ZERO because they will not react.

Problem: Na2CO3(aq) + ZnF2(aq) --à

Step1: Double Replacement Reactions

Step2: Na₂CO₃(aq) + ZnF₂ (aq) --à ZnCO₃ + NaF

Step3: Na₂CO₃(aq) + ZnF₂ (aq) --à ZnCO₃ + NaF

Step4: Na₂CO₃(aq) + ZnF₂ (aq) --à ZnCO₃ + 2 NaF