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Balance the following chemical equations and indicate the class of reaction. Wri

ID: 960641 • Letter: B

Question

Balance the following chemical equations and indicate the class of reaction. Write the equations for each pair of reactants. Be sure to remember subscripted states and charges where appropriate. Be careful of NO reaction. Potassium carbonate, K_2CO_3 and tin (IV) chloride, SnCl_4 balanced molecular net ionic Sodium sulfate, Na_2SO_4 and copper (II) chloride. CuCI_2 balanced molecular net ionic Postassium Hydroxide, KOH and Zinc Nitrate, Zn(NO_3)_2 balanced molecular net ionic The following is the combustion reaction of propane gas C_3 H_8 + 5O_2 rightarrow 3CO_2 + 4H_2O How many moles of water will be produced when 8.0 moles of propane, (C_3H_8) are burned?

Explanation / Answer

1.

a.S8+8O2 ----> 8SO2

It is an example of oxidation reaction because here the oxidation number of S increases from 0 to +4.

b. 2Al + 6HCl = 2AlCl3 + 3H2

It is an example of Single Displacement or (Substitution) because here H is displacement by Al3+

c. Pb(NO3)2 + 2KCl --> PbCl2 + 2KNO3

It is an example of double Displacement reaction because here more reactive element displaces a less reactive element from its compound and form other products.

d. P4 + 6 Br2 4 PBr3

It is an example of addition reaction because here P4 and Br 2 add and form new product .

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