5.5 Salts From Insoluble Bases

Question 1

What is the difference between alkali and bases?

Answer 1

• bases are compounds that can neutralise acids (they have a pH more than 7)
• an alkali is a type of base that are soluble in water

Question 2

Examples of bases

Answer 2

Metal oxides, such as sodium or copper oxide

Question 3

Neutralisation def

Answer 3

The chemical reaction of an acid with a base in which a salt and water are formed. If the base is carbonate or hydrogen carbonate, carbon dioxide is also produced in the reaction

Question 4

What are salts made up of and where do the positive ions come from

Answer 4

• Positive metal ions and and a negative ion from an acid
• +ve ions come from a metal, a base or a carbonate

Question 5

Do ionic compounds have an overall charge

Answer 5

No

Question 6

What is the charge on group 1 ions

Answer 6

+1

Question 7

What is the charge on group 2 metal ions

Answer 7

+2

Question 8

What is the charge of an aluminium ion

Answer 8

+3

Question 9

What is the charge on an ammonium ion

Answer 9

+1, NH4+

Question 10

What is the charge of transition metals

Answer 10

• variable
• given by roman numerals
• eg copper II = Cu2+

Question 11

What is the charge on group 7 ions

Answer 11

• 1

Question 12

What is the charge of nitrate ions

Answer 12

-1

Question 13

What is the charge on sulphate ions

Answer 13

-2

Question 14

Hydrochloric acid formula

Answer 14

HCl

Question 15

Sulphuric acid formula

Answer 15

H2SO4

Question 16

Nitric acid formula

Answer 16

HNO3

Question 17

Metal + acid —>

Answer 17

Salt + hydrogen

Question 18

Metal oxide/hydroxide + acid

Answer 18

Salt + water

Question 19

Metal carbonate + acid

Answer 19

Salt + water + carbon dioxide