chemistry help how do u write molecular equations?

Question

The word observed means what changes did you see (such as color changes, solid formation, etc.) Write the equations (molecular ) for all reactions that occur.


a. What will be observed when a piece of Cu metal is added to a MgSO4 solution?
b. What will be observed when a piece of Pb metal is added to a ZnSO4 solution?
c. What will be observed when a piece of Fe metal is added to a AgNO3 solution?
d. What will be observed when a piece of Ag metal is added to a Pb(NO3)2 solution?
e. What will be observed when a piece of Ca metal is added to a AgNO3 solution?

Answer 1

a. MgSO4 breaks up into (Mg)+2 and (SO4)-2 ions. Cu will just move in and replace Mg:
MgSO4 + Cu --> CuSO4 + Mg

b. same thing as a.

c. depends on if you have Fe (II) or Fe (III) - it's all stoichiometry

d. stoichiometry - you see from c. that Ag:NO3 is 1:1, but here you have 2 NO3 per 1 Pb (meaning Pb is in the +2 oxidation state)
Pb(NO3)2 + 2Ag --> Pb + 2AgNO3

e. Ca is +2, again - stoichiometry! 2 (NO3) per 1 Ca.
Ca + 2AgNO3 --> Ca(NO3)2 + 2Ag

Answer 2

It seems that you missed your chemistry lab.

Look at your solubility tables to predict this, and speak with your laboratory assistant or instructor about making up this experiment set.