Question 17 (4 marks) (a) Draw the Lewis electron dot structure for the compound, hydrogen fluoride, HF. (1 mark) H F (b) Hydrogen fluoride reacts with water according to the following equationâ¦ HF (l) + H 2 O (l) â H 3 O +(aq) + F â(aq) At room temperature pure hydrogen fluoride exists as a liquid.his shows that water is made up of more than one type of atom. (1 mark) âº The two substances obtained were in definite ratio of 2:1 as shown by the 2:1 ratio of the gas volumes. (1 mark) (ii) State another observation that shows that electrolysis is a chemical change.
Definition of columnist for English Language Learners. : a person who writes a newspaper or magazine column.
noun. 1 A newspaper having pages half the size of those of the average broadsheet, typically popular in style and dominated by sensational stories: [as modifier]: the tabloid press. More example sentences. 1  She has even forgiven boyfriends who have sold stories about her to the tabloids.ore example sentences. 1  The first obstacle to the rising star of my career in tabloid television was that we were lost. 2  Chattering about tabloid trivia or television celebrity shows, he can barely conceal his lack of interest.