module 12.4- ionic compounds and solubility

Question 1

what is the chem formula for ionic compounds?

Answer 1

the empirical formula of the compound

Question 2

what is an elemental ion?

Answer 2

ion formed when atom loses/gains an e-

Question 3

polyatomic ions definition

Answer 3

positively/negatively charged ions that contain more than one type of atom (element)

Question 4

an ionic compound is…

Answer 4

neutral overall with no charge

Question 5

what happens to the name of non-metal ions?

Answer 5

end of name changes to ‘ide’
-> eg chloride, oxide, phosphide

Question 6

what are spectator ions?

Answer 6

ions that do not participate in a reaction and are not included in the final ionic equations

Question 7

what happens when an ionic compound dissolves in water? *mention the type of bonding that occurs

Answer 7

• cation separates from anion
• slightly negative end of water molecule (O) is attracted to cation *vice versa
• this type of bonding between ions and dipole molecule (eg water) is called ion-dipole bonding

Question 8

what happens when an ionic compound dissolves in water? *mention the type of bonding that occurs

Answer 8

• cation separates from anion
• slightly negative end of water molecule (O) is attracted to cation *vice versa
• this type of bonding between ions and dipole molecule (eg water) is called ion-dipole bonding

Question 9

sales are ionic compounds that…., acids are molecules that…

Answer 9

dissociate, ionise