To solve the given equations and determine the correct molecular formulas, we need to apply the rules of chemical reactions and write the balanced equations.
1. Fe (s) + Ni(NO3)2 (aq) = Fe(NO3)2 (aq) + Ni (s)
To balance this equation, we start by ensuring that the number of atoms of each element on both sides of the equation is equal.
There is already one iron (Fe) atom on each side. Now let's balance the other elements:
Fe (s) + Ni(NO3)2 (aq) = Fe(NO3)2 (aq) + Ni (s)
On the left: 2 nitrate (NO3) ions (2 x NO3)
On the right: 2 nitrate (NO3) ions (1 x NO3)
To balance the nitrate ions, we can multiply the nitrate (NO3) on the right side by 2:
Fe (s) + Ni(NO3)2 (aq) = Fe(NO3)2 (aq) + Ni (s)
Now all the elements are balanced, and the correct balanced equation is:
Fe (s) + Ni(NO3)2 (aq) = Fe(NO3)2 (aq) + Ni (s)
You can check this equation against your answer.
Now, let's move on to the rest of the equations and find their balanced molecular formulas.
2. FeCl3(s) + K3PO4(aq) = FePO4(s) + KCl(aq)
3. CaCl2(s) + K3PO4(aq) = Ca3(PO4)2(s) + 2KCl(aq)
4. FeCl3(s) + KNO3(aq) = Fe(NO3)3(s) + KCl(aq)
5. Fe2(SO4)3(aq) + 3K3PO4(aq) = 2FePO4(s) + 3K2SO4(aq)
6. CuBr2(s) + 2NH4OH(aq) = Cu(OH)2(s) + 2NH4Br
7. ZnBr2(s) + 2NH4OH(aq) = Zn(OH)2(s) + 2NH4Br
8. CuBr2(s) + 2NH4NO3(aq) = Cu(NO3)2(s) + 2NH4Br
9. CuSO4(s) + 2NH4OH(aq) = Cu(OH)2(s) + (NH4)2SO4(aq)
10. NiCl2(s) + Na2CO3(aq) = NiCO3(s) + 2NaCl(aq)
11. MgCl2(s) + Na2CO3(aq) = MgCO3(s) + 2NaCl(aq)
12. NiCl2(s) + 2NaNO3(aq) = Ni(NO3)2(s) + 2NaCl(aq)
13. NiSO4(s) + Na2CO3(aq) = NiCO3(s) + Na2SO4(aq)
You can match these balanced equations with your answers and see if they align.