Question

sLA OF AcomERCcR CHMISILL CLASSIFICATION OF CEMCAL REACTIONs 1-REDON REACTIONS 5 Date Post-laboratory Exercise Score A. Complete and balance each of these reaction equations. Most will need formulas for the products, a few will need only balancing. Use two-letter abbreviations to designate the reaction opes as follows: acid base neutralization AB, combination-CM, combustion- CO, double replacement-DR. decomposition DC, redox OR, single replacement-SR. Some reactions may fall into more than one category-show them all. For single- and double-replacement reactions where no reaction should occur write NR in place of the reaction type. Name TYPE(S) REACTION P-Os + 1- H:O- HsPO color 2. CaHs+ O 3. H2SO+ NH4OH Cm/or N.R. Dc Dr ar/AB NR 4. FeClh + AgNO)- 5. Ci2H2O11 + O2- 6. Au + Fe(NO))2- A MgCO 7. Pb(CIO4)2- Fe:(SO4)) + 8. HsPO4- NaOH 9. MgSO 10. Pb + MgO +H2O _Mg(OH) 11 NR CoSO4+_CuCl: Cael 2 tCoso 12. .2 NHsN+3H 13. Sr HCI n cl2 HM 14. Zn + 15._CoCl-6 H:O coclz tetzC

Answer 1

Balancing is to adjust the number of reactant atoms and products, placing coefficients to the left of the reactants or products Match the number of atoms on both sides of the reaction. It is suggested to balance the atoms in the following order: Metals No metals Hydrogen Oxygen 1. Р.О5 Н,о Н,РО, Reactants Product The number of P atoms in reactants is greater than that of product. To equalize the atoms on both sides it is necessary to place the coefficient 2 in products 2H3PO + H,о P205 The number of H atoms in product is greater than that of reactants. To equalize the atoms on both sides it is necessary to place the coefficient 3 in reactants. Р.0, + Зн,о — 2H,РО, The number of O atoms it is the same in reactants and product, that is 8 Reaction type: CM Two substances react to give a single product

+ O2 2. СдНо Reaction type: Co Chemical reaction of a substance called fuel with oxygen O2 со, + Н.о С Н. The number of C atoms in reactants is greater than that of product. To equalize the atoms on both sides it is necessary to place the coefficient 4 in products. 4CO2H2O С, Н. O2 6 The number of H atoms in reactants is greater than that of products. To equalize the atoms on both sides it is necessary to place the coefficient 3 in products 4CO2 O2 С,На + The number of O atoms in products is greater than that of reactants. To equalize the atoms on both sides it is necessary to place the coefficient 5.5 in reactants 4CО, + 3Н,0 C4H5.5 O2

3. Н,SO, но'HN Reaction type: DR + It consists of two elements that are in different compounds exchange positions, forming two new compounds. Н,о HN)OS H2SO4 + но'HN The number of S atoms is the same on both sides of sides of the reaction The number of N atoms is lower in the reactants than in the products. To equalize the atoms on both sides it is necessary to place the coefficient 2 in reactants. H2SO EHN)OS Но The number of H atoms in reactants is greater than that of products. To equalize the atoms on both sides it is necessary 2NH2OH to place the coefficient 2 in products H2SO42NH OH HN)OS The number of O atoms is the same on both sides of sides of 2H20 the reaction

4. FeCl AgNO3 Reaction type: DR It consists of two elements that are in different compounds exchange positions, forming two new compounds AgCl Fe(NO3)3 FeCl3 AgNO3 The number of Fe atoms is the same on both sides of sides of the reaction The number of Cl atoms is lower in the products than in the products. To equalize the atoms on both sides it is necessary to place the coefficient 3 in products 3AgCl FeClAgNO3 Fe(NO3)3 The number of Ag atoms is greater in products than that of reactants. To equalize the atoms on both sides it is necessary to place the coefficient 3 in reactants. 3 AGNO3 FeCl3 Fe(NO3)3 3AgCl The number of O atoms is the same on both sides of sides of the reaction

5. СpHa011 O2 Reaction type: CO + H,о O2 C12H22011 со, The number of C atoms in reactants is greater than that of product. To equalize the atoms on both sides it is necessary to place the coefficient 12 in products со, + Н,о 12 CO2 O2 C12H22011 + The number of H atoms in reactants is greater than that of products. To equalize the atoms on both sides it is necessary to place the coefficient 11 in products 12 CO2 11 H20 C12H22011 + The number of O atoms in products is greater than that of reactants. To equalize the atoms on both sides it is necessary to place the coefficient 12 in reactants. 12 CO2 11 H2O 12 O2 C12H22011

6. Au Fe(NO3)2 Reaction type: SR A metal is displaced by another within a compound Fe(NO3)2 Fe Au(NO3)2 Au The number of Au atoms is the same on both sides of the reaction The number of Fe atoms is the same on both sides of the reaction The number of N atoms is the same on both sides of the reaction The number of O atoms is the same on both sides of the reaction

A 7. MgCO3 Reaction type: DC A single substance decomposes, producing two or more different substances. MgOCO2 MgCO3 The number of Mg atoms is the same on both sides of the reaction The number of C atoms is the same on both sides of the reaction The number of O atoms is the same on both sides of the reaction

8. Fe2(SO)3+3Pb(CIO)2 Reaction type: DR Two ionic compounds that are in different compounds, exchange positions forming two new compounds Fe(CIO4)3 PbSO Fe2(SO4)3Pb(CI02 The number of Fe atoms in reactants is greater than that of product. To equalize the atoms on both sides it is necessary to place the coefficient 2 in products. -2Fe(CIO4)3 PbSO, Fe2(SO4)3Pb(CIO4)2 The number of SO4 in reactants is greater than that of products. To equalize SO4 on both sides it is necessary to place the coefficient 3 in products. 2Fe(CIO33PbSO Fe2(SO43Pb(CIO42 The number of Pb atoms in products is greater than that of reactants. To equalize the Pb atoms on both sides it is necessary to place the coefficient 3 in reactants. 2Fe(CIO4)33PbSO Fe2(SO4)3+3Pb(CIO4)2

9. NaOH H3PO4 Base Acido Reaction type: AB NaOH H3PO NaHPO + H,о The number of Na atoms in products is greater than that of reactant. To equalize the atoms on both sides it is necessary to place the coefficient 2 in reactants 2NaOH H3PO Na,HPO, + H,о The number of H atoms in products is less than that of reactant. To equalize the atoms on both sides it is necessary to place the coefficient 2 in products NazHPO 2NaOH HPO4 2H2O The number of O atoms is the same on both sides of the reaction

10. Pb MgSO4 Reaction type: SR PbSO Pb MgSO4 Mg Balanced equation

11. Pb MgSO 4 Reaction type: CM PbSO Mg Pb MgSO4 Balanced equation

12. CoSO4 Cucl2- + Reaction type: DR CoCl2 CuSO4 CoSO4CuC2 + Balanced equation