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Saturday, 7 March 2015

Types of Reaction Worksheet and Answer

Types of Chemical Reactions Worksheet

There are 5 major types of reactions simplified by the following equations:
  • Synthesis/Combination      A + B à AB
  • Decomposition                     AB à A + B
  • Combustion                          ? + O2 à ?
  • Single Replacement            X + AB à XB + A               or            Y + AB à AY + B
  • Double Replacement          XY + AB à XB + AY

Classify each of the following reactions:

1. Zn   +    Cl2  à ZnCl2                                 combination
2. 2 H2S +   3 O2 à   2 SO2  +    2 H2O         combustion
3. Cu + 2 AgNO3 à Cu(NO3)2 + 2 Ag          single replacement
4. Mg(OH)2 à MgO + H2O                           decomposition
5. CaCl2    +    Na2SO4 à CaSO4 + 2 NaCl   double replacement
6. CaO +    H2O à Ca(OH)2                                      combination  
7. Pb  + 4 HCl à PbCl4 + 2 H2                      single replacement
8. Li2O +   CO2 à LiCO3                               combination
9. SO2 +   H2O à H2SO3                               combination
10. MgCO3 à MgO + CO2                            decomposition
Predict the product and Classify each of the following reactions when only the reactants are given:

1. Mg  +  N2 à Mg3N2                                             combination
2. C2H6 +  O2 à CO2  +  H2O                                  combustion
3. Zn  + CuCl2  àZnCl2   +  Cu                               single replacement
4. Ca  + H2àCa(OH)2 + H2                                single replacement
5. AgNO3    +    NaI àAgI  + NaNO3                      double replacement
6. Fe(NO3)3    +    LiOH à Fe (OH)3 + LiNO3        double replacement
7. MgCO3 àMgO + CO2                                          decomposition
8. SO2 +    H2O àH2SO3                                          combination
9. HI àH2 + I2                                                          decomposition
10. H2SO4    +    LiOH à Li2SO4  +  H2O              double replacement
Convert these following into symbol equations
  1. Some grey magnesium ribbon was added to colourless dilute hydrochloric acid. The metal dissolves producing magnesium chloride and produces some hydrogen gas.

Mg(s)  +  HCl(aq)   à  MgCl2(aq)  +  H2(g)
  1. Some zinc metal is added to copper(11) sulphate solution. The zinc becomes coated with copper and colourless zinc sulphate solution is produced.

Zn(s)  +  CuSO4(aq)  à  ZnSO4(aq)  +  Cu(s)
  1. Some colourless hydrogen gas is mixed with colourless oxygen gas. The mixture is sparked and it explodes producing steam which condenses to liquid water.

H2(g)  +  O2(g)  à  H2O(l)
  1. Magnesium ribbon is burnt in carbon dioxide gas. It burns splattering as it goes. Black carbon is produced and some magnesium oxide solid.

Convert these word equations below into symbol symbol equations. Then classify the following reactions, represented by word equations, as synthesis/combination, decomposition , single replacement, double replacement, combustion
1)      sulphur + oxygen à  sulphur dioxide                                    ……………...

S  +  O2  à  SO2                               combination


2)      sodium + chlorine à  sodium chloride                                   ……………...

Na    +  Cl2   à   NaCl                      combination


3)      magnesium + oxygen à   magnesium oxide                          ……………...

Mg   +    O2    à    MgO                   combination/combustion


4)      magnesium + hydrochloric acid    ----------->  magnesium chloride + hydrogen ……………...
                                                         HEAT

Mg    +   HCl    à   MgCl2    +   H2 single replacement

5)      calcium carbonate ----------->.calcium oxide + carbon dioxide                                   ……………...
                                HEAT


CaCO3  à  CaO   +  CO2                decomposition

6)       mercury oxide      -------------->  mercury + oxygen                           ……………...
HEAT


            Hg2O  à  Hg  + O2                           decomposition


7)      sodium nitrate à sodium nitrite + oxygen                 ……………...

NaNO3  à  NaNO2  +  O2               decomposition



8)      aluminium + iron III oxide  -------------->aluminium oxide + iron ……………...
HEAT


            Al   +   Fe2O3   à  Al2O3   +  Fe     single replacement


9)      cobalt II chloride crystals --------------->.anhydrous cobalt chloride + water vapour                   
                                              HEAT                                                                 ……………...

CoCl2. n H2O  à   CoCl2   +   H2O           decompostion


10)  nitrogen + hydrogen ---------------> ammonia (hydrogen nitride) ……………...
                                  iron catalyst


            N2  +   H2   à  NH3                          combination

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