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Worksheet 18 . Topic 5

Set B cont.
____ C atoms
12. C3H5(OH)3 ____ H atoms Total number of atoms in each formula

____ O atoms
__________

.
13. LiCl 4H2O ____ Li atoms
____ Cl atoms
____ H atoms __________
____ O atoms
.
14. CuSO4 3H2O ____ Cu atoms
____ S atoms
Teacher Preview Copy
____ O atoms Need help? Study Book pg 97 Set 1
____ H atoms __________

15. NH4Cl. 5H2O ____ N atoms
____ H atoms
____ Cl atoms __________
____ O atoms

Set C: Counting ions in ionic formulas Objective: To test your ability to determine ratio of ions in
ionic formulas.
18 . Na2CO3 Teacher Preview Copy
For each ionic formula, write symbols and names of both ions in the formula. Then indicate ratio of the
ions in the formula. Follow the example given below.
Ex. MgCO3 Ions in formula: Mg (magnesium ion) CO3 (carbonate ion)
2-
2+
Ratio of ions : 1 : 1

16. KCl Ions in formula:
Ratio of ions :

17. SrBr2 Ions in formula:
Ratio of ions :

Ions in formula:
Ratio of ions :
Need help? Study Book pg 98 Set 2
19. CaSO4 Ions in formula:
Ratio of ions :
20. (NH4)3PO4 Ions in formula:
Ratio of ions :

21. Mg(ClO3)2 Ions in formula:
Ratio of ions :

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