How to Balance Compounds
Step 1: Put charges above each ion in the compound. (ex: Ca+2OH-1)
Step 2: Criss Cross Method: Balancing out compounds means to balance out the charge of the
compound so that the net charge is ZERO.
(ex: Ca+2(OH-1)2)
Calcium has a +2 charge and hydroxide has 2 -1 charges, when added together, the net
charge is zero.
Notice that we had to put a parenthesis around t he hydroxide so that the O and the H
both have the quantity of two.
Practice Problems:
1. CdF =
2. CeS
3. RbO
4. MgS
5. NiN
6. BiN
7. CaI
8. Pb+2S
9. NH4Cl
10. CaBrO3
Worksheet-Monatomics
Directions: Write balanced formulas. (Write ions, place charges above, and balance!!)
1. Sodium Bromide
______________ 33. Cobalt (II) Fluoride
___________________
2. Barium Sulfide
_______________34. Manganese (III) Sulfide
___________________
3. Iron (III) Phosphide
_______________35. Silicon Nitride
___________________
4. Copper (II) Iodide
_______________36. Cobalt (III) Selenide
___________________
5. Iron (II) Bromide
_______________37. Lead (IV) Chloride
___________________
6. Magnesium Boride
_______________38. Manganese (III) Bromide
7. Silicon Oxide
_______________39. Aluminum Selenide
_________________
8. Bismuth Fluoride
_______________40. Iron (II) Hydride
_________________
9. Potassium Nitride
_______________41. Cerium Oxide
_________________
10. Tin (II) Fluoride
_______________42. Cobalt (III) Boride
_________________
11. Tin (IV) Sulfide
_______________43. Chromium (II) Selenide
_________________
12. Tin (II) Hydride
_______________44. Manganese (II) Iodide
_________________
13. Copper (I) Boride
___________________
14. Silver Sulfide
___________________
15. Lead (IV) Iodide
___________________
16. Chromium (III) Bromide
___________________
17. Rubidium Oxide
___________________
18. Cesium Chloride
___________________
19. Cerium Sulfide
___________________
20. Mercury (II) Iodide
___________________
21. Lead (II) Chloride
___________________
22. Cobalt (II) Fluoride
___________________
23. Iron (III) Sulfide
___________________
24. Strontium Fluoride
___________________
25. Aluminum Boride
___________________
26. Lithium Nitride
___________________
27. Cadmium Boride
___________________
28. Manganese (II) Iodide
___________________
29. Cobalt (III) Selenide
___________________
30. Tin (IV) Phosphide
___________________
31. Iron (III) nitride
___________________
32. Chromium (III) Fluoride
___________________
__________________