5.28 describe the use of sulfuric acid in the manufacture of detergents, fertilisers and paints

Detergents: used to 'sulphonate' products (apperently.)
Fertilisers: reacted to make phosphates soluble to plants: reacted to make ammonia easier to handle.
Paints: reacted with titanium ore to make a main pigment in paint.

http://bscstriplescience.wikispaces.com/file/view/C3_4_12+Why+is+sulphuric+acid+important.pdf