AlinaMaco
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a) Balance the following equations:
i) PbCl2 + AgNO3 <----> AgCl + Pb (NO3) 2
ii) AlCl3 + NH4OH <----> Al(OH)3 + NH4Cl
iii) FeCl3 + Ca(OH)2 <----> CaCl2 + Fe(OH)3
iv) Pb(ClO3)2 + K2SO4 <----> PbSO4 + KClO3
v) Na + HOH <----> NaOH + H2
vi) Zn + HCl <----> ZnCl2 + H2
vii) Al + AgCH3COO <----> Al(CH3COO)3 + Ag
viii) MgO + HNO3 <----> Mg (NO3)2 + H2O
ix) MnO2 <----> Mn3O4 + O2
b) Why is it incorrect to alter the chemical formula when balancing an equation?



Answer :

SoapyMcTavish
A-
i) [tex]PbCl_2 + 2AgNO_3 = 2AgCl + Pb(NO_3)2[/tex]
ii) [tex]AlCl_3 + 3NH_4OH = Al(OH)_3 + 3NH_4Cl[/tex]
iii) [tex]2FeCl_3 + 3Ca(OH)_2 = 3CaCl_2 + 2Fe(OH)_3[/tex]
iv) [tex]Pb(ClO_3)_2 + K_2SO_4 = PbSO_4 + 2KClO_3[/tex]
v) [tex]2Na + 2HOH = 2NaOH + H_2[/tex]
vi) [tex]Zn + 2HCl = ZnCl_2 + H_2[/tex]
vii) [tex]Al + 3AgCH_3COO = Al(CH_3COO)_3 + 3Ag[/tex]
viii) [tex]MgO + 2HNO_3 = Mg(NO_3)_2 + H_2O[/tex]
ix) [tex]3MnO_2 = Mn_3O_4 + O_2[/tex]

B- Because chemical formula has its own unique set of elements and subscripts

Hope this Helps :)

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