1. PREDICTING CHEMICAL REACTIONS:

2. Single displacement Reactions:
Mg(s) + ZnCl2(aq) → Zn(s)+ MgCl2(aq)
The most reactive element (Mg) will replace the least reactive element (Zn) in a compound.

3. Single displacement Reactions:
Mg(s) + ZnCl2(aq) → Zn(s)+ MgCl2(aq)
The most reactive element (Mg) will replace the least reactive element (Zn) in a compound.
See Activity Series of metals

4. Activity Series of Metals:
Name Symbol Name Symbol
Lithium Li
Potassium K
Calcium Ca
Sodium Na
Magnesium Mg
Barium Ba
Aluminum Al
Zinc Zn
Iron Fe
Nickel Ni
Tin Sn
Lead Pb
(Hydrogen) (H)*
Copper Cu
Silver Ag
Platinum Pt
Gold Au
Halogens:
All replace the H in water forming the metal hydroxide + H2 (g).
Fluorine F
Chlorine Cl
Bromine Br
Iodine I
Reactivity decreases

5. EXERCISE:
Predict if the following reactions will occur. If yes, complete the chemical balanced equation :
1) Ca(s) + ZnCl2(aq) →
2) Fe(s) + KOH(aq) →
3) HCl(aq) + Zn(s) →
4) HCl(aq) + Cu(s) →

6. EXERCISE:
Predict if the following reactions will occur. If yes, complete the chemical balanced equation:
1) Ca(s) + ZnCl2(aq) → CaCl2(aq) + Zn(s)
2) Fe(s) + NaOH(aq) →
3) HCl(aq) + Zn(s) →
4) HCl(aq) + Cu(s) →

7. EXERCISE:
Predict if the following reactions will occur. If yes, complete the chemical balanced equation :
1) Ca(s) + ZnCl2(aq) → CaCl2(aq) + Zn(s)
2) Fe(s) + NaOH(aq) → N/R
3) HCl(aq) + Zn(s) →
4) HCl(aq) + Cu(s) →

8. EXERCISE:
Predict if the following reactions will occur. If yes, complete the chemical balanced equation :
1) Ca(s) + ZnCl2(aq) → CaCl2(aq) + Zn(s)
2) Fe(s) + NaOH(aq) → N/R
3) HCl(aq) + Zn(s) →
4) HCl(aq) + Cu(s) →

9. EXERCISE:
Predict if the following reactions will occur. If yes, complete the chemical balanced equation :
1) Ca(s) + ZnCl2(aq) → CaCl2(aq) + Zn(s)
2) Fe(s) + NaOH(aq) → N/R
3) HCl(aq) + Zn(s) → ZnCl2(aq) + H2(g)
4) HCl(aq) + Cu(s) →

10. EXERCISE:
Predict if the following reactions will occur. If yes, complete the chemical balanced equation :
1) Ca(s) + ZnCl2(aq) → CaCl2(aq) + Zn(s)
2) Fe(s) + NaOH(aq) → No
3) 2HCl(aq) + Zn(s) → ZnCl2(aq) + H2(g)
4) HCl(aq) + Cu(s) →

11. EXERCISE:
Predict if the following reactions will occur. If yes, complete the chemical balanced equation :
1) Ca(s) + ZnCl2(aq) → CaCl2(aq) + Zn(s)
2) Fe(s) + NaOH(aq) → No
3) 2HCl(aq) + Zn(s) → ZnCl2(aq) + H2(g)
4) HCl(aq) + Cu(s) → N/R

12. A halogen can also replace another halogen from a compound: The activity of halogens decreases as you go down Group 7A of the periodic table (F, Cl, Br, & I). Br2(aq) + 2NaI(aq) → * Bromine is more active than iodine, so the reaction occurs. Br2(aq) + NaCl(aq) → * But bromine is less active than chlorine, so this reaction does not occur. 2
NaBr(aq)
+ I2 (aq)
N/R

13. Double displacement Reactions
2KI(aq) + Pb(NO3)2(aq) → PbI2 (s)+ 2KNO3(aq)
They generally take place in aqueous solution and often produce a precipitate, a gas, a liquid, or a molecular compound such as water.

14. Double displacement Reactions
2KI(aq) + Pb(NO3)2(aq) → PbI2 (s)+ 2KNO3(aq)
They generally take place in aqueous solution and often produce a precipitate, a gas, a liquid, or a molecular compound such as water.
Examples:
KCl(aq) + AgNO3(aq) →
NaOH(aq) + HCl(aq) →
HCI(aq) + CaCO3(s) →

15. Double displacement Reactions
2KI(aq) + Pb(NO3)2(aq) → PbI2 (s)+ 2KNO3(aq)
They generally take place in aqueous solution and often produce a precipitate, a gas, a liquid, or a molecular compound such as water.
Examples:
KCl(aq) + AgNO3(aq) → AgCl(s)+ KNO3(aq)
NaOH(aq) + HCl(aq) →
HCI(aq) + CaCO3(s) →

16. Double displacement Reactions
2KI(aq) + Pb(NO3)2(aq) → PbI2 (s)+ 2KNO3(aq)
They generally take place in aqueous solution and often produce a precipitate, a gas, a liquid, or a molecular compound such as water.
Examples:
KCl(aq) + AgNO3(aq) → AgCl(s)+ KNO3(aq)
NaOH(aq) + HCl(aq) → NaCl(aq)+ H2O(l)
HCI(aq) + CaCO3(s) →

17. Double displacement Reactions
2KI(aq) + Pb(NO3)2(aq) → PbI2 (s)+ 2KNO3(aq)
They generally take place in aqueous solution and often produce a precipitate, a gas, a liquid, or a molecular compound such as water.
Examples:
KCl(aq) + AgNO3(aq) → AgCl(s)+ KNO3(aq)
NaOH(aq) + HCl(aq) → NaCl(aq)+ H2O(l)
HCI(aq) + CaCO3(s) → CaCI2 (aq)+ H2O(l)+ CO2(g)

18. Double displacement Reactions
2KI(aq) + Pb(NO3)2(aq) → PbI2 (s)+ 2KNO3(aq)
They generally take place in aqueous solution and often produce a precipitate, a gas, a liquid, or a molecular compound such as water.
Examples:
KCl(aq) + AgNO3(aq) → AgCl(s)+ KNO3(aq)
NaOH(aq) + HCl(aq) → NaCl(aq)+ H2O(l)
2HCI(aq) + CaCO3(s) → CaCI2 (aq)+ H2O(l)+ CO2(g)

19. Exercise: Predict and complete:
1) Zn(s) + Cu(NO3)2(aq) →
2) Cu(s) + Zn(NO3)2(aq) →
3) NaOH(aq) + Zn(NO3)2(aq) →
4) KCl(aq) + Mg(NO3)2(aq) →

20. Zn(s) + Cu(NO3)2(aq) → Yes (Zn is more reactive than Cu)
2) Cu(s) + Zn(NO3)2(aq) →
3) NaOH(aq) + Zn(NO3)2(aq) →
4) KCl(aq) + Mg(NO3)2(aq) →

21. Zn(s) + Cu(NO3)2(aq) → Yes (Zn is more reactive than Cu)
Zn(s) + Cu(NO3)2(aq) → Zn(NO3)2(aq) + Cu(s)
2) Cu(s) + Zn(NO3)2(aq) →
3) NaOH(aq) + Zn(NO3)2(aq) →
4) KCl(aq) + Mg(NO3)2(aq) →

22. Zn(s) + Cu(NO3)2(aq) → Yes (Zn is more reactive than Cu)
Zn(s) + Cu(NO3)2(aq) → Zn(NO3)2(aq) + Cu(s)
2) Cu(s) + Zn(NO3)2(aq) → NO (Cu is less reactive than Zn)
3) NaOH(aq) + Zn(NO3)2(aq) →
4) KCl(aq) + Mg(NO3)2(aq) →

23. Zn(s) + Cu(NO3)2(aq) → Yes (Zn is more reactive than Cu)
Zn(s) + Cu(NO3)2(aq) → Zn(NO3)2(aq) + Cu(s)
2) Cu(s) + Zn(NO3)2(aq) → NO (Cu is less reactive than Zn)
3) NaOH(aq) + Zn(NO3)2(aq) → Yes ( Zn(OH)2 is insoluble)
4) KCl(aq) + Mg(NO3)2(aq) →

24. Zn(s) + Cu(NO3)2(aq) → Yes (Zn is more reactive than Cu)
Zn(s) + Cu(NO3)2(aq) → Zn(NO3)2(aq) + Cu(s)
2) Cu(s) + Zn(NO3)2(aq) → NO (Cu is less reactive than Zn)
3) NaOH(aq) + Zn(NO3)2(aq) → Yes ( Zn(OH)2 is insoluble)
NaOH(aq) + Zn(NO3)2(aq) → NaNO3(aq) + Zn(OH)2(s)
4) KCl(aq) + Mg(NO3)2(aq) →

25. Zn(s) + Cu(NO3)2(aq) → Yes (Zn is more reactive than Cu)
Zn(s) + Cu(NO3)2(aq) → Zn(NO3)2(aq) + Cu(s)
2) Cu(s) + Zn(NO3)2(aq) → NO (Cu is less reactive than Zn)
3) NaOH(aq) + Zn(NO3)2(aq) → Yes ( Zn(OH)2 is insoluble)
NaOH(aq) + Zn(NO3)2(aq) → 2NaNO3(aq) + Zn(OH)2(s)
4) KCl(aq) + Mg(NO3)2(aq) →

26. Zn(s) + Cu(NO3)2(aq) → Yes (Zn is more reactive than Cu)
Zn(s) + Cu(NO3)2(aq) → Zn(NO3)2(aq) + Cu(s)
2) Cu(s) + Zn(NO3)2(aq) → NO (Cu is less reactive than Zn)
3) NaOH(aq) + Zn(NO3)2(aq) → Yes ( Zn(OH)2 is insoluble)
2NaOH(aq) + Zn(NO3)2(aq) → 2NaNO3(aq) + Zn(OH)2(s)
4) KCl(aq) + Mg(NO3)2(aq) →

27. Zn(s) + Cu(NO3)2(aq) → Yes (Zn is more reactive than Cu)
Zn(s) + Cu(NO3)2(aq) → Zn(NO3)2(aq) + Cu(s)
2) Cu(s) + Zn(NO3)2(aq) → NO (Cu is less reactive than Zn)
3) NaOH(aq) + Zn(NO3)2(aq) → Yes ( Zn(OH)2 is insoluble)
2NaOH(aq) + Zn(NO3)2(aq) → 2NaNO3(aq) + Zn(OH)2(s)
4) KCl(aq) + Mg(NO3)2(aq) → NO (no precipitate, liquid or gas is formed).