Chemical formulation
Files to download
Rules for naming compounds
Rules for naming Type I binary compounds
1. The (metal) cation is always named first and the (non metal) anion second.
2. The cation takes its name from the name of the element.
3. The anion is named by taking the first part of the element name (the root) and adding the letters “IDE.”
4. Write the name for the compound by combining the names of the ions.
e.g. Name the compound CaO.
● Ca is the chemical symbol for calcium.
● O is the symbol for oxygen, whose root is “ox.” Add the “ide” ending to get oxide.
● CaO = calcium oxide.
Write the formula for Potassium sulfide.
1. .Identify the elements symbols K S
2.. Find the ions (oxidation numbers) K+ S2-
3.. Balance the positive and negative charges K+ K+ S2-
4.. Simplify by putting numbers of each atom at the bottom
Don’t write the number 1 K2S
5. (if necessary) reduce numbers to their lowest ratio
1. The (metal) cation is always named first and the (non metal) anion second.
2. The cation takes its name from the name of the element.
3. The anion is named by taking the first part of the element name (the root) and adding the letters “IDE.”
4. Write the name for the compound by combining the names of the ions.
e.g. Name the compound CaO.
● Ca is the chemical symbol for calcium.
● O is the symbol for oxygen, whose root is “ox.” Add the “ide” ending to get oxide.
● CaO = calcium oxide.
Write the formula for Potassium sulfide.
1. .Identify the elements symbols K S
2.. Find the ions (oxidation numbers) K+ S2-
3.. Balance the positive and negative charges K+ K+ S2-
4.. Simplify by putting numbers of each atom at the bottom
Don’t write the number 1 K2S
5. (if necessary) reduce numbers to their lowest ratio
Some extra help
Check out these websites to practice formulation online. I looks very basic but you can find explanations and quizzes which might be very helpful.
LINK 1
LINK 2
LINK 3
LINK 4
Acids:
LINK 1
LINK 2
LINK 3
Download the free Mercx PSE HD Periodic table app for IOS:
App store
Or the free Periodic Droid app for Android:
Play Store
LINK 1
LINK 2
LINK 3
LINK 4
Acids:
LINK 1
LINK 2
LINK 3
Download the free Mercx PSE HD Periodic table app for IOS:
App store
Or the free Periodic Droid app for Android:
Play Store
The periodic table of elements
From Visually.
Practice questions.
1. Ca(OH)2
2. MgO
3. HF
4. NaCl
5. KBr
6. Fe(OH)3
7. K2SO4
8. Cl2O7
9. Pb(SO3)2
10.H2SO3
11. Potassium hypoiodite
12. Potassium permanganate
13. Calcium phosphate
14. Potassium bromide
15. Tin (IV) hydroxide
16. Sodium oxide
17. Iron (III) hydroxide
18. Gold (I) oxide
19: Hydrobromic acid
20. Carbonic acid:
2. MgO
3. HF
4. NaCl
5. KBr
6. Fe(OH)3
7. K2SO4
8. Cl2O7
9. Pb(SO3)2
10.H2SO3
11. Potassium hypoiodite
12. Potassium permanganate
13. Calcium phosphate
14. Potassium bromide
15. Tin (IV) hydroxide
16. Sodium oxide
17. Iron (III) hydroxide
18. Gold (I) oxide
19: Hydrobromic acid
20. Carbonic acid:
